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Articles 31 - 60 of 87
Full-Text Articles in Engineering
A Porous Nano-Micro-Composite As A High-Performance Bi-Functional Air Electrode With Remarkable Stability For Rechargeable Zinc–Air Batteries, Yasir Arafat, Muhammad R. Azhar, Yijun Zhong, Xiaomin Xu, Moses O. Tadé, Zongping Shao
A Porous Nano-Micro-Composite As A High-Performance Bi-Functional Air Electrode With Remarkable Stability For Rechargeable Zinc–Air Batteries, Yasir Arafat, Muhammad R. Azhar, Yijun Zhong, Xiaomin Xu, Moses O. Tadé, Zongping Shao
Research outputs 2014 to 2021
The development of bi-functional electrocatalyst with high catalytic activity and stable performance for both oxygen evolution/reduction reactions (OER/ORR) in aqueous alkaline solution is key to realize practical application of zinc–air batteries (ZABs). In this study, we reported a new porous nano-micro-composite as a bi-functional electrocatalyst for ZABs, devised by the in situ growth of metal–organic framework (MOF) nanocrystals onto the micrometer-sized Ba0.5Sr0.5Co0.8Fe0.2O3 (BSCF) perovskite oxide. Upon carbonization, MOF was converted to porous nitrogen-doped carbon nanocages and ultrafine cobalt oxides and CoN4 nanoparticles dispersing inside the carbon nanocages, which further anchored on the surface of BSCF oxide. We homogeneously dispersed BSCF …
Synergistic Effect Of Hydrophilic Nanoparticles And Anionic Surfactant On The Stability And Viscoelastic Properties Of Oil In Water (O/W) Emulations; Application For Enhanced Oil Recovery (Eor), Sarmad Al-Anssari, Zain-Ul-Abedin Arain, Haider A. Shanshool, Alireza Keshavarz, Mohammad Sarmadivaleh
Synergistic Effect Of Hydrophilic Nanoparticles And Anionic Surfactant On The Stability And Viscoelastic Properties Of Oil In Water (O/W) Emulations; Application For Enhanced Oil Recovery (Eor), Sarmad Al-Anssari, Zain-Ul-Abedin Arain, Haider A. Shanshool, Alireza Keshavarz, Mohammad Sarmadivaleh
Research outputs 2014 to 2021
With the rapidly increased global energy demand, great attention has been focused on utilizing nanotechnology and particularly nanofluids in enhanced oil recovery (EOR) to produce more oil from low-productivity oil reservoirs. Nanofluid flooding has introduced as one of the promising methods for enhanced oil recovery using environment-friendly nanoparticles (NPs) to be as an innovative-alternative for chemical methods of EOR. This work investigates the synergistic effects of anionic surfactant and hydrophilic silica nanoparticles on the stability and the mechanical behavior of oil in water (O/W) emulsions for their application in EOR. To achieve this, an extensive series of experiments were conducted …
Mhd Heat Transfer In W-Shaped Inclined Cavity Containing A Porous Medium Saturated With Ag/Al2o3 Hybrid Nanofluid In The Presence Of Uniform Heat Generation/Absorption, Mohamed Dhia Massoudi, Mohamed Bechir Ben Hamida, Hussein A. Mohammed, Mohammed A. Almeshaal
Mhd Heat Transfer In W-Shaped Inclined Cavity Containing A Porous Medium Saturated With Ag/Al2o3 Hybrid Nanofluid In The Presence Of Uniform Heat Generation/Absorption, Mohamed Dhia Massoudi, Mohamed Bechir Ben Hamida, Hussein A. Mohammed, Mohammed A. Almeshaal
Research outputs 2014 to 2021
© 2020 by the Authors. In this paper, a 2D numerical study of natural convection heat transfer in a W-shaped inclined enclosure with a variable aspect ratio was performed. The enclosure contained a porous medium saturated with Ag/Al2O3 hybrid nanofluid in the presence of uniform heat generation or absorption under the effect of a uniform magnetic field. The vertical walls of the enclosure were heated differentially; however, the top and bottom walls were kept insulated. The governing equations were solved with numerical simulation software COMSOL Multiphysics which is based on the finite element method. The results showed that the convection …
Comparison And Verification Of Turbulence Reynolds-Averaged Navier-Stokes Closures To Model Spatially Varied Flows, Kudzai Chipongo, Mehdi Khiadani, Kaveh Sookhak Lari
Comparison And Verification Of Turbulence Reynolds-Averaged Navier-Stokes Closures To Model Spatially Varied Flows, Kudzai Chipongo, Mehdi Khiadani, Kaveh Sookhak Lari
Research outputs 2014 to 2021
The robustness and accuracy of Reynolds-averaged Navier–Stokes (RANS) models was investigated for complex turbulent flow in an open channel receiving lateral inflow, also known as spatially varied flow with increasing discharge (SVF). The three RANS turbulence models tested include realizable k–ε, shear stress transport k–ω and Reynolds stress model based on their prominence to model jets in crossflows. Results were compared to experimental laser Doppler velocimetry measurements from a previous study. RANS results in the uniform flow region and farther from the jet centreline were more accurate than within the lateral inflow region. On the …
Stable Dispersion Of Coal Fines During Hydraulic Fracturing Flowback In Coal Seam Gas Reservoirs - An Experimental Study, Faisal Ur Rahman Awan, Alireza Keshavarz, Hamed Akhondzadeh, Sarmad Al-Anssari, Ahmed Al-Yaseri, Ataollah Nosrati, Muhammad Ali, Sefan Iglauer
Stable Dispersion Of Coal Fines During Hydraulic Fracturing Flowback In Coal Seam Gas Reservoirs - An Experimental Study, Faisal Ur Rahman Awan, Alireza Keshavarz, Hamed Akhondzadeh, Sarmad Al-Anssari, Ahmed Al-Yaseri, Ataollah Nosrati, Muhammad Ali, Sefan Iglauer
Research outputs 2014 to 2021
In subterranean coal seam gas (CSG) reservoirs, massive amounts of small-sized coal fines are released during the production and development stages, especially during hydraulic fracturing stimulation. These coal fines inevitably cause mechanical pump failure and permeability damage due to aggregation and subsequent pore-throat blockage. This aggregation behavior is thus of key importance in CSG production and needs to be minimized. Consequently, such coal fines dispersions need to be stabilized, which can be achieved by the formulation of improved fracturing fluids. Here, we thus systematically investigated the effectiveness of two additives (ethanol, 0.5 wt % and SDBS, 0.001 and 0.01 wt …
Robust Placement And Sizing Of Charging Stations From A Novel Graph Theoretic Perspective, Hossein Parastvand, Octavian Bass, Mohammad A. S. Masoum, Airlie Chapman, Stefan Lachowicz
Robust Placement And Sizing Of Charging Stations From A Novel Graph Theoretic Perspective, Hossein Parastvand, Octavian Bass, Mohammad A. S. Masoum, Airlie Chapman, Stefan Lachowicz
Research outputs 2014 to 2021
This paper proposes analytical approaches to extend the capacity of existing networks of electric vehicles (EVs) by placement of additional charging stations (CSs) as well as determining the sizes of existing and new CSs in order to handle future expansions of EVs. The EV flow at CSs is modeled by a graph where nodes are potential locations for CSs and edges are uncertain parameters representing the variable EV flow at CSs. The required extra CS locations are explored by transforming the CS placement problem into a controllability framework addressed by maximum matching principle (MMP). To find the sizes of each …
A Sample Weight And Adaboost Cnn-Based Coarse To Fine Classification Of Fruit And Vegetables At A Supermarket Self-Checkout, Khurram Hameed, Douglas Chai, Alexander Rassau
A Sample Weight And Adaboost Cnn-Based Coarse To Fine Classification Of Fruit And Vegetables At A Supermarket Self-Checkout, Khurram Hameed, Douglas Chai, Alexander Rassau
Research outputs 2014 to 2021
© 2020 by the authors. Licensee MDPI, Basel, Switzerland. The physical features of fruit and vegetables make the task of vision-based classification of fruit and vegetables challenging. The classification of fruit and vegetables at a supermarket self-checkout poses even more challenges due to variable lighting conditions and human factors arising from customer interactions with the system along with the challenges associated with the colour, texture, shape, and size of a fruit or vegetable. Considering this complex application, we have proposed a progressive coarse to fine classification technique to classify fruit and vegetables at supermarket checkouts. The image and weight of …
Cyber-Security Constrained Placement Of Facts Devices In Power Networks From A Novel Topological Perspective, Hossein Parastvand, Octavian Bass, Mohammad A. S. Masoum, Airlie Chapman, Stefan Lachowicz
Cyber-Security Constrained Placement Of Facts Devices In Power Networks From A Novel Topological Perspective, Hossein Parastvand, Octavian Bass, Mohammad A. S. Masoum, Airlie Chapman, Stefan Lachowicz
Research outputs 2014 to 2021
Optimal placement of flexible AC transmission systems (FACTS) devices and the cyber-security of associated data exchange are crucial for the controllability of wide area power networks. The placement of FACTS devices is studied in this paper from a novel graph theoretic perspective, which unlike the existing approaches, purely relies on topological characteristics of the underlying physical graphs of power networks. To this end, the maximum matching principle (MMP) is used to find the set of required FACTS devices for the grid controllability. In addition, the cyber-security of the most critical data related to the FACTS controllers is guaranteed by introducing …
Multi-Hole Simultaneous Drilling Of Aluminium Alloy: A Preliminary Study And Evaluation Against One-Shot Drilling Process, Muhammad Aamir, Shanshan Tu, Khaled Giasin, Majid Tolouei-Rad
Multi-Hole Simultaneous Drilling Of Aluminium Alloy: A Preliminary Study And Evaluation Against One-Shot Drilling Process, Muhammad Aamir, Shanshan Tu, Khaled Giasin, Majid Tolouei-Rad
Research outputs 2014 to 2021
Poly-drill heads are used in mass production to increase productivity when a large number of holes are required. In this work, drilling experiments on Al5083 aluminium alloy were carried out using a poly-drill head to measure the thrust force and assess hole quality. Analysis of chip formations and post-machining tool condition were evaluated using optical microscopy. Additional drilling tests were conducted using one-shot drilling and results obtained from the two drilling techniques were evaluated against each other. The results showed that the average thrust forces obtained from poly-drill head were slightly lower than those from one-shot drilling. Improvement in hole …
Socio-Hydrological Modelling To Assess Reliability Of An Urban Water System Under Formal-Informal Supply Dynamics, Rakhshinda Bano, Mehdi Khiadani, Stephen Burian
Socio-Hydrological Modelling To Assess Reliability Of An Urban Water System Under Formal-Informal Supply Dynamics, Rakhshinda Bano, Mehdi Khiadani, Stephen Burian
Research outputs 2014 to 2021
Increasing water scarcity in developing world cities combined with poor performance of water supply systems has led to an increasing reliance on informal water supply systems. Although the availability of informal supply provides a coping mechanism that enables water consumers to be resilient to failures in water supply, the longer-term effects on formal water supply systems (FWSS) are uncertain, with a potential reduction of tariff recovery (RT), and in turn a service provider’s financial sustainability. This motivates an analysis of the coevolving dynamics and feedbacks involved in water systems where formal and informal components co-exist. Investigating Hyderabad, Pakistan …
Leak Location Based On Pds-Vmd Of Leakage-Induced Vibration Signal Under Low Snr In Water-Supply Pipelines, Shuaiyong Li, Chuanqiang Xia, Zhenhua Cheng, Weipei Mao, Ying Liu, Daryoush Habibi
Leak Location Based On Pds-Vmd Of Leakage-Induced Vibration Signal Under Low Snr In Water-Supply Pipelines, Shuaiyong Li, Chuanqiang Xia, Zhenhua Cheng, Weipei Mao, Ying Liu, Daryoush Habibi
Research outputs 2014 to 2021
Leak location in water-supply pipelines is of great significance in order to preserve water resources and reduce economic losses. Cross-correlation (CC) based leak location is a popular and effective method in water-supply pipelines (WSP). However, with a decrease of signal to noise ratio (SNR), the errors of time-delay estimation (TDE) based on CC will become larger making it almost impossible to determine a leakage position. Hence, this work proposes leak location based on a combination of phase difference spectrum and variational mode decomposition (PDS-VMD) of leakage-induced vibration signal under low SNR for WSP. Firstly, the leakage-induced vibration signal is decomposed …
False Data Injection Attack (Fdia): An Overview And New Metrics For Fair Evaluation Of Its Countermeasure, Mohiuddin Ahmed, Al-Sakib Khan Pathan
False Data Injection Attack (Fdia): An Overview And New Metrics For Fair Evaluation Of Its Countermeasure, Mohiuddin Ahmed, Al-Sakib Khan Pathan
Research outputs 2014 to 2021
The concept of false data injection attack (FDIA) was introduced originally in the smart grid domain. While the term sounds common, it specifically means the case when an attacker compromises sensor readings in such tricky way that undetected errors are introduced into calculations of state variables and values. Due to the rapid growth of the Internet and associated complex adaptive systems, cyber attackers are interested in exploiting similar attacks in other application domains such as healthcare, finance, defense, governance, etc. In today’s increasingly perilous cyber world of complex adaptive systems, FDIA has become one of the top-priority issues to deal …
Green And Secure Computation Offloading For Cache-Enabled Iot Networks, M. Ishtiaque A. Zahed, Iftekhar Ahmad, Daryoush Habibi, Quoc Viet Phung
Green And Secure Computation Offloading For Cache-Enabled Iot Networks, M. Ishtiaque A. Zahed, Iftekhar Ahmad, Daryoush Habibi, Quoc Viet Phung
Research outputs 2014 to 2021
The ever-increasing number of diverse and computation-intensive Internet of things (IoT) applications is bringing phenomenal growth in global Internet traffic. Mobile devices with limited resource capacity (i.e., computation and storage resources) and battery lifetime are experiencing technical challenges to satisfy the task requirements. Mobile edge computing (MEC) integrated with IoT applications offloads computation-intensive tasks to the MEC servers at the network edge. This technique shows remarkable potential in reducing energy consumption and delay. Furthermore, caching popular task input data at the edge servers reduces duplicate content transmission, which eventually saves associated energy and time. However, the offloaded tasks are exposed …
Application Of A Brain-Inspired Spiking Neural Network Architecture To Odor Data Classification, Anup Vanarse, Josafath Israel Espinosa-Ramos, Adam Osseiran, Alexander Rassau, Nikola Kasabov
Application Of A Brain-Inspired Spiking Neural Network Architecture To Odor Data Classification, Anup Vanarse, Josafath Israel Espinosa-Ramos, Adam Osseiran, Alexander Rassau, Nikola Kasabov
Research outputs 2014 to 2021
Existing methods in neuromorphic olfaction mainly focus on implementing the data transformation based on the neurobiological architecture of the olfactory pathway. While the transformation is pivotal for the sparse spike-based representation of odor data, classification techniques based on the bio-computations of the higher brain areas, which process the spiking data for identification of odor, remain largely unexplored. This paper argues that brain-inspired spiking neural networks constitute a promising approach for the next generation of machine intelligence for odor data processing. Inspired by principles of brain information processing, here we propose the first spiking neural network method and associated deep machine …
Integration Of Heat Pipe Solar Water Heating Systems With Different Residential Households: An Energy, Environmental, And Economic Evaluation, Abdellah Shafieian, Mehdi Khiadani
Integration Of Heat Pipe Solar Water Heating Systems With Different Residential Households: An Energy, Environmental, And Economic Evaluation, Abdellah Shafieian, Mehdi Khiadani
Research outputs 2014 to 2021
This study presents a detailed methodology for evaluating the energy, environmental, and economic contributions of heat pipe solar water heating (HPSWH) systems in various households. The hot water consumption patterns of Perth residents in Australia in one, two, and four-occupant houses are extracted in hourly basis throughout a year. The annual performance of the system is evaluated based on parameters such as saved energy, solar fraction, avoided CO2 emission, saved money, and payback period. Moreover, an experimental rig is designed, manufactured, and tested. The results show that the contribution of the solar system in meeting the hot water demand …
Machinability Of Al2024, Al6061, And Al5083 Alloys Using Multi-Hole Simultaneous Drilling Approach, Muhammad Aamir, Majid Tolouei-Rad, Khaled Giasin, Ana Vafadar
Machinability Of Al2024, Al6061, And Al5083 Alloys Using Multi-Hole Simultaneous Drilling Approach, Muhammad Aamir, Majid Tolouei-Rad, Khaled Giasin, Ana Vafadar
Research outputs 2014 to 2021
Aluminium alloys are extensively used in different industries due to their good mechanical properties, machinability, low cost and reliable inspection. Drilling is one of the most important machining processes for assembly operations. The number of holes required in an assembly may vary from several holes to millions depending on the application which increases the manufacturing time and costs. In this study, a multi-spindle drill head also known as the poly-drill head is used to perform multi-hole simultaneous drilling with the aim to increase productivity. Dry drilling tests are performed on Al2024, Al6061, and Al5083 aluminium alloys using uncoated carbide …
Energy Efficiency Of A Flat-Plate Solar Collector Using Thermally Treated Graphene-Based Nanofluids: Experimental Study, Omer A. Alawi, Haslinda Mohamed Kamar, Hussein A. Mohammed, A. R. Mallah, Omar A. Hussein
Energy Efficiency Of A Flat-Plate Solar Collector Using Thermally Treated Graphene-Based Nanofluids: Experimental Study, Omer A. Alawi, Haslinda Mohamed Kamar, Hussein A. Mohammed, A. R. Mallah, Omar A. Hussein
Research outputs 2014 to 2021
© The Author(s) 2020. A covalent functionalization approach was utilized for the preparation of highly dispersed pentaethylene glycol-thermally treated graphene-water as the absorbing material inside a flat-plate solar collector. Four mass fractions of nanofluids were prepared (0.025, 0.05, 0.075, and 0.1 wt% pentaethylene glycol-thermally treated graphene-water). Graphene nanoparticles were characterized by energy dispersive X-ray analysis with a scanning electron microscope. Measurements of the thermophysical properties were subsequently carried out for the nanosuspensions. The raw investigation data were collected from an indoor flat-plate solar collector test setup. The experimental procedure included different sets of variables such as input temperatures of 303, …
Selective Adsorption Of Rare Earth Ions From Aqueous Solution On Metal-Organic Framework Hkust-1, Liang Zhao, Xiaoguang Duan, Muhammad R. A. Azhar, Hongqi Sun, Xiangchen Fang, Shaobin Wang
Selective Adsorption Of Rare Earth Ions From Aqueous Solution On Metal-Organic Framework Hkust-1, Liang Zhao, Xiaoguang Duan, Muhammad R. A. Azhar, Hongqi Sun, Xiangchen Fang, Shaobin Wang
Research outputs 2014 to 2021
Recovery of rare earth ions from wastewater holds an important strategy for the use of the precious resources. In this study, we found that a metal-organic framework (MOF), HKUST-1, exhibited a high affinity and selectivity towards adsorptive recovery of rare earth ions (Ce3+ and La3+) in aqueous solutions. The adsorbent showed a remarkable adsorption capacity of 234 mg/g and 203 mg/g for Ce3+ and La3+ at pH = 6, respectively. More importantly, its adsorption selectivity of the rare earth ions was about 87% against other metal ions. The adsorption isotherm, kinetics, and mechanism in the process were also investigated. The …
A Graph Automorphic Approach For Placement And Sizing Of Charging Stations In Ev Network Considering Traffic, Hossein Parastvand, Valeh Moghaddam, Octavian Bass, Mohammad A.S. Masoum, Airlie Chapman, Stefan Lachowicz
A Graph Automorphic Approach For Placement And Sizing Of Charging Stations In Ev Network Considering Traffic, Hossein Parastvand, Valeh Moghaddam, Octavian Bass, Mohammad A.S. Masoum, Airlie Chapman, Stefan Lachowicz
Research outputs 2014 to 2021
This paper proposes a novel graph-based approach with automorphic grouping for the modelling, synthesis, and analysis of electric vehicle (EV) networks with charging stations (CSs) that considers the impacts of traffic. The EV charge demands are modeled by a graph where nodes are positioned at potential locations for CSs, and edges represent traffic flow between the nodes. A synchronization protocol is assumed for the network where the system states correspond to the waiting time at each node. These models are then utilized for the placement and sizing of CSs in order to limit vehicle waiting times at all stations below …
Reducing The Impacts Of Electric Vehicle Charging On Power Distribution Transformers, Pravakar Pradhan, Iftekhar Ahmad, Daryoush Habibi, Ganesh Kothapalli, Mohammad A.S. Masoum
Reducing The Impacts Of Electric Vehicle Charging On Power Distribution Transformers, Pravakar Pradhan, Iftekhar Ahmad, Daryoush Habibi, Ganesh Kothapalli, Mohammad A.S. Masoum
Research outputs 2014 to 2021
This article investigates the effects of high penetration levels of Electric Vehicle (EV) charging on power distribution transformers and proposes a new solution to minimize its negative impacts. There has been growing concern over Greenhouse Gas (GHG) emissions within the transportation sector, which accounts for about 23% of total energy-related carbon-dioxide emissions. The main solution to this problem is the electrification of vehicles. However, large scale integration of EVs into existing grid systems poses some challenges. One major challenge is the accelerated aging of expensive grid assets such as transformers. In this article, a demand response mechanism based on the …
Experimental Investigation Into L-Arg And L-Cys Eco-Friendly Surfactants In Enhanced Oil Recovery By Considering Ift Reduction And Wettability Alteration, Hamed Foroughi Asl, Ghasem Zargar, Abbas Khaksar Manshad, Mohammad Ali Takassi, Jagar A. Ali, Alireza Keshavarz
Experimental Investigation Into L-Arg And L-Cys Eco-Friendly Surfactants In Enhanced Oil Recovery By Considering Ift Reduction And Wettability Alteration, Hamed Foroughi Asl, Ghasem Zargar, Abbas Khaksar Manshad, Mohammad Ali Takassi, Jagar A. Ali, Alireza Keshavarz
Research outputs 2014 to 2021
Surfactant flooding is an important technique used to improve oil recovery from mature oil reservoirs due to minimizing the interfacial tension (IFT) between oil and water and/or altering the rock wettability toward water-wet using various surfactant agents including cationic, anionic, non-ionic, and amphoteric varieties. In this study, two amino-acid based surfactants, named lauroyl arginine (l-Arg) and lauroyl cysteine (l-Cys), were synthesized and used to reduce the IFT of oil–water systems and alter the wettability of carbonate rocks, thus improving oil recovery from oil-wet carbonate reservoirs. The synthesized surfactants were characterized using Fourier transform infrared spectroscopy and nuclear magnetic resonance analyses, …
Fe-Based Metallic Glasses And Dyes In Fenton-Like Processes: Understanding Their Intrinsic Correlation, Xueqing Wang, Qiaoyue Zhang, Shun-Xing Liang, Zhe Jia, Wenchang Zhang, Weimin Wang, Lai-Chang Zhang
Fe-Based Metallic Glasses And Dyes In Fenton-Like Processes: Understanding Their Intrinsic Correlation, Xueqing Wang, Qiaoyue Zhang, Shun-Xing Liang, Zhe Jia, Wenchang Zhang, Weimin Wang, Lai-Chang Zhang
Research outputs 2014 to 2021
Fe-based metallic glasses have been demonstrated as effective heterogeneous catalysts in Fenton-like processes for dye degradation. Yet, currently corresponding studies have limitations due to the limited study object (dyes) and the correlation between metallic glasses and dye pollutants in Fenton-like processes is still not comprehensively studied. Accordingly, this work intensively investigated the thermal catalytic behavior correlations between two Fe-based metallic glasses (Fe78Si9B13 and Fe73.5Si13.5B9Cu1Nb3) and eight different dyes. Results indicated a lower activation energy in the more active metallic glass and a dependence of the activation energy …
Optimization And Modeling Of Process Parameters In Multi-Hole Simultaneous Drilling Using Taguchi Method And Fuzzy Logic Approach, Muhammad Aamir, Shanshan Tu, Majid Tolouei-Rad, Khaled Giasin, Ana Vafadar
Optimization And Modeling Of Process Parameters In Multi-Hole Simultaneous Drilling Using Taguchi Method And Fuzzy Logic Approach, Muhammad Aamir, Shanshan Tu, Majid Tolouei-Rad, Khaled Giasin, Ana Vafadar
Research outputs 2014 to 2021
In industries such as aerospace and automotive, drilling many holes is commonly required to assemble different structures where machined holes need to comply with tight geometric tolerances. Multi-spindle drilling using a poly-drill head is an industrial hole-making approach that allows drilling several holes simultaneously. Optimizing process parameters also improves machining processes. This work focuses on the optimization of drilling parameters and two drilling processes-namely, one-shot drilling and multi-hole drilling-using the Taguchi method. Analysis of variance and regression analysis was implemented to indicate the significance of drilling parameters and their impact on the measured responses i.e., surface roughness and hole size. …
Thermal-Hydraulic Performance In A Microchannel Heat Sink Equipped With Longitudinal Vortex Generators (Lvgs) And Nanofluid, Basel Al Muallim, Mazlan A. Wahid, Hussain A. Mohammed, Mohammed Kamil, Daryoush Habibi
Thermal-Hydraulic Performance In A Microchannel Heat Sink Equipped With Longitudinal Vortex Generators (Lvgs) And Nanofluid, Basel Al Muallim, Mazlan A. Wahid, Hussain A. Mohammed, Mohammed Kamil, Daryoush Habibi
Research outputs 2014 to 2021
In this study, the numerical conjugate heat transfer and hydraulic performance of nanofluids flow in a rectangular microchannel heat sink (RMCHS) with longitudinal vortex generators (LVGs) was investigated at different Reynolds numbers (200-1200). Three-dimensional simulations are performed on a microchannel heated by a constant temperature with five different configurations with different angles of attack for the LVGs under laminar flow conditions. The study uses five different nanofluid combinations of Al2O3 or CuO, containing low volume fractions in the range of 0.5% to 3.0% with various nanoparticle sizes that are dispersed in pure water, PAO (Polyalphaolefin) or ethylene glycol. The results …
3d Magneto-Buoyancy-Thermocapillary Convection Of Cnt-Water Nanofluid In The Presence Of A Magnetic Field, Lioua Kolsi, Salem Algarni, Hussain A. Mohammed, Walid Hassen, Emtinene Lajnef, Walid Aich, Mohammed Almeshaal
3d Magneto-Buoyancy-Thermocapillary Convection Of Cnt-Water Nanofluid In The Presence Of A Magnetic Field, Lioua Kolsi, Salem Algarni, Hussain A. Mohammed, Walid Hassen, Emtinene Lajnef, Walid Aich, Mohammed Almeshaal
Research outputs 2014 to 2021
Anumerical study is performed to investigate the effects of adding Carbon Nano Tube (CNT) and applying a magnetic field in two directions (vertical and horizontal) on the 3D-thermo-capillary natural convection. The cavity is differentially heated with a free upper surface. Governing equations are solved using the finite volume method. Results are presented in term of flow structure, temperature field and rate of heat transfer. In fact, results revealed that the flow structure and heat transfer rate are considerably affected by the magnitude and the direction of the magnetic field, the presence of thermocapillary forces and by increasing nanoparticles volume fraction. …
A Comprehensive Review Of Acoustic Methods For Locating Underground Pipelines, Ying Liu, Daryoush Habibi, Douglas Chai, Xiuming Wang, Hao Chen, Yan Gao, Shuaiyong Li
A Comprehensive Review Of Acoustic Methods For Locating Underground Pipelines, Ying Liu, Daryoush Habibi, Douglas Chai, Xiuming Wang, Hao Chen, Yan Gao, Shuaiyong Li
Research outputs 2014 to 2021
Underground pipelines are vital means of transporting fluid resources like water, oil and gas. The process of locating buried pipelines of interest is an essential prerequisite for pipeline maintenance and repair. Acoustic pipe localization methods, as effective trenchless detection techniques, have been implemented in locating underground utilities and shown to be very promising in plastic pipeline localization. This paper presents a comprehensive review of current acoustic methods and recent advances in the localization of buried pipelines. Investigations are conducted from multiple perspectives including the wave propagation mechanism in buried pipe systems, the principles behind each method along with advantages and …
Review Of Polymer Composites With Diverse Nanofillers For Electromagnetic Interference Shielding, Dimuthu Wanasinghe, Farhad Aslani, Guowei Ma, Daryoush Habibi
Review Of Polymer Composites With Diverse Nanofillers For Electromagnetic Interference Shielding, Dimuthu Wanasinghe, Farhad Aslani, Guowei Ma, Daryoush Habibi
Research outputs 2014 to 2021
Polymer matrix composites have generated a great deal of attention in recent decades in various fields due to numerous advantages polymer offer. The advancement of technology has led to stringent requirements in shielding materials as more and more electronic devices are known to cause electromagnetic interference (EMI) in other devices. The drive to fabricate alternative materials is generated by the shortcomings of the existing metallic panels. While polymers are more economical, easy to fabricate, and corrosion resistant, they are known to be inherent electrical insulators. Since high electrical conductivity is a sought after property of EMI shielding materials, polymers with …
Solids Velocity Measurement Using Electric Capacitance Sensor Assemblies, Usama Abrar, Liu Shi, Nasif Raza Jaffri, Qin Li, Hassan Raza Sindhu, Mian Waqas Omar
Solids Velocity Measurement Using Electric Capacitance Sensor Assemblies, Usama Abrar, Liu Shi, Nasif Raza Jaffri, Qin Li, Hassan Raza Sindhu, Mian Waqas Omar
Research outputs 2014 to 2021
This paper covers the application of the cross-correlation method for measuring the velocity of solid particles. Capacitive electrodes are used as primary sensors to measure the time required by the solid particles to cover a known distance between the electrodes. The capacitive variations of both the electrode sensors are stored in computer synchronously for offline estimation of the velocity of the solid particles. Single glass marble is used as a solid particle to conduct the performance in the lab for its good signal to noise ratio (SNR) and vivid graphs. Matlab R2018a is used as a programming tool to perform …
Vortex Fluidic Mediated Synthesis Of Polysulfone, Aghil Igder, Scott Pye, Ahmed Hussein Mohammed Al-Antaki, Alireza Keshavarz, Colin L. Raston, Ata Nosrati
Vortex Fluidic Mediated Synthesis Of Polysulfone, Aghil Igder, Scott Pye, Ahmed Hussein Mohammed Al-Antaki, Alireza Keshavarz, Colin L. Raston, Ata Nosrati
Research outputs 2014 to 2021
Polysulfone (PSF) was prepared under high shear in a vortex fluidic device (VFD) operating in confined mode, and its properties compared with that prepared using batch processing. This involved reacting the pre-prepared disodium salt of bisphenol A (BPA) with a 4,4′-dihalodiphenylsulfone under anhydrous conditions. Scanning electron microscopy (SEM) established that in the thin film microfluidic platform, the PSF particles are sheet-like, for short reaction times, and fibrous for long reaction times, in contrast to spherical like particles for the polymer prepared using the conventional batch synthesis. The operating parameters of the VFD (rotational speed of the glass tube, its tilt …
Increasing The Yield Of Lactuca Sativa, L. In Glass Greenhouses Through Illumination Spectral Filtering And Development Of An Optical Thin Film Filter, Jacqualine Anne Thomas, Mikhail Vasiliev, Mohammad Nur-E-Alam, Kamal Alameh
Increasing The Yield Of Lactuca Sativa, L. In Glass Greenhouses Through Illumination Spectral Filtering And Development Of An Optical Thin Film Filter, Jacqualine Anne Thomas, Mikhail Vasiliev, Mohammad Nur-E-Alam, Kamal Alameh
Research outputs 2014 to 2021
With the increase in world population, the continued advances in modern greenhouse agriculture and plant growth practices are expected to help overcome the global problem of future food shortages. The next generation greenhouse design practices will need to address a range of issues, ranging from energy and land use efficiency to providing plant-optimized growth techniques. In this paper, we focus on investigating the optimum irradiation spectra matched to the lettuce species (Lactuca sativa, L.), commonly grown in greenhouse environments, in order to develop low-emissivity glass panes that maximize the biomass productivity of glass greenhouses. This low-emissivity glass passes the solar …