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Articles 1 - 7 of 7
Full-Text Articles in Engineering
Numerical Study Of Flow Characteristics Around A 30° Yawed Circular Cylinder At R E = 10 4, Ran Wang, Shaohong Cheng, David S.K. Ting
Numerical Study Of Flow Characteristics Around A 30° Yawed Circular Cylinder At R E = 10 4, Ran Wang, Shaohong Cheng, David S.K. Ting
Mechanical, Automotive & Materials Engineering Publications
Unstable motions of bridge stay cables have been observed on site and in wind tunnel tests when a cable is yawed at certain orientations to wind. To uncover the underlying mechanisms, flow around a circular cylinder at a yaw angle of 30° has been numerically analyzed in the current study using delayed detached eddy simulation (DDES) at R e = 10 4 . A comparison with the reference normal flow case indicates the presence of a more coherent span-wise flow structure when the cylinder is yawed at 30°. The application of proper orthogonal decomposition further reveals that at this orientation, …
Numerical Study Of Flow Characteristics Around A 30° Yawed Circular Cylinder At R E = 10 4, Ran Wang, Shaohong Cheng, David S.K. Ting
Numerical Study Of Flow Characteristics Around A 30° Yawed Circular Cylinder At R E = 10 4, Ran Wang, Shaohong Cheng, David S.K. Ting
Civil and Environmental Engineering Publications
Unstable motions of bridge stay cables have been observed on site and in wind tunnel tests when a cable is yawed at certain orientations to wind. To uncover the underlying mechanisms, flow around a circular cylinder at a yaw angle of 30° has been numerically analyzed in the current study using delayed detached eddy simulation (DDES) at R e = 10 4 . A comparison with the reference normal flow case indicates the presence of a more coherent span-wise flow structure when the cylinder is yawed at 30°. The application of proper orthogonal decomposition further reveals that at this orientation, …
Thermal Modelling Of A Passive Style Net-Zero Greenhouse In Alberta: The Effect Of Ground Parameters And The Solar To Air Fraction, Oselen J. Imafidon, David S.K. Ting, Rupp Carriveau
Thermal Modelling Of A Passive Style Net-Zero Greenhouse In Alberta: The Effect Of Ground Parameters And The Solar To Air Fraction, Oselen J. Imafidon, David S.K. Ting, Rupp Carriveau
Mechanical, Automotive & Materials Engineering Publications
Agricultural greenhouses can provide a suitable microclimate for crops to thrive under extreme weather conditions. The operations of these greenhouses are expensive due to the energy requirement of the active thermal conditioning systems required to maintain the growing environment for crop production. Engineering of these greenhouses to utilize clean renewable energy sources is critical and necessary to mitigate their carbon footprint, paving the way to a more sustainable agricultural industry. This paper presents numerical modelling of a net-zero passive solar greenhouse in Alberta, Canada with winter temperatures below freezing. The indoor microclimate of the greenhouse is modelled using the detailed …
Trading Electricity With Blockchain Systems, David Bowker, Anant Venkateswaran, Fazel Mohammadi, Abdulraheem Al Garni, Marko Vukobratovic, Claudio Lima, Farrokh Rahimi, Igor Ferreira, Davor Bosnjak, Hannes Agabus, Praveen Agarwal, Santosh Jain, Simon Mikulich, Victor Francisco, Toshiyuki Sawa, Umit Cali, Vladislav Berezovsky, Hannah Davis, Subhendu Subhendu, Gregor Karlovsek, Alex Barakat, Vivek Bhandari, Ivan Ostheimer, Jemma Green
Trading Electricity With Blockchain Systems, David Bowker, Anant Venkateswaran, Fazel Mohammadi, Abdulraheem Al Garni, Marko Vukobratovic, Claudio Lima, Farrokh Rahimi, Igor Ferreira, Davor Bosnjak, Hannes Agabus, Praveen Agarwal, Santosh Jain, Simon Mikulich, Victor Francisco, Toshiyuki Sawa, Umit Cali, Vladislav Berezovsky, Hannah Davis, Subhendu Subhendu, Gregor Karlovsek, Alex Barakat, Vivek Bhandari, Ivan Ostheimer, Jemma Green
Electrical and Computer Engineering Publications
On the wave of the development of new ICT technologies and renewable energy, the power system will certainly experience great changes to its outdated architecture over the next several decades. One of the key drivers of change in the power system is distributed energy resources. They are completely changing the paradigm of the power system as a system with a centralized hierarchy and one-way power flows from generation to customer and from high voltage to low voltage. Because the goals of net zero greenhouse gas emissions are gathering pace and are being accepted by countries around the world, slowdown in …
Event-Based Robust Control Techniques For Wheel-Based Robots Under Cyber-Attack And Dynamic Quantizer, Mobin Saeedi, Jafar Zarei, Mehrdad Saif, Allahyar Montazeri
Event-Based Robust Control Techniques For Wheel-Based Robots Under Cyber-Attack And Dynamic Quantizer, Mobin Saeedi, Jafar Zarei, Mehrdad Saif, Allahyar Montazeri
Electrical and Computer Engineering Publications
Nowadays, mobile robots are becoming an increasingly significant part of daily human life. Humanoid robots, wheeled mobile robots, aerial vehicles, mobile manipulators, and more are examples of mobile robots. As opposed to other robots, they are capable of moving autonomously, with sufficient intelligence to make decisions in response to the perceptions they receive from their environment. In today’s world, cooperative tasks and the ability to control robots via networks make them a component of cyber-physical systems (CPSs). In this study, mobile robots that are acting as a part of CPSs are examined. Data-network burden, signal quantizers, cyber security, delayed transition, …
Improvement To An Existing Multi-Level Capacitated Lot Sizing Problem Considering Setup Carryover, Backlogging, And Emission Control, Rifat Bin Hasan, Hany Osman, Ahmed A. Azab Ismail, Fazle Baki
Improvement To An Existing Multi-Level Capacitated Lot Sizing Problem Considering Setup Carryover, Backlogging, And Emission Control, Rifat Bin Hasan, Hany Osman, Ahmed A. Azab Ismail, Fazle Baki
Mechanical, Automotive & Materials Engineering Publications
This paper presents a multi-level, multi-item, multi-period capacitated lot-sizing problem. The lot-sizing problem studies can obtain production quantities, setup decisions and inventory levels in each period fulfilling the demand requirements with limited capacity resources, considering the Bill of Material (BOM) structure while simultaneously minimizing the production, inventory, and machine setup costs. The paper proposes an exact solution to Chowdhury et al. (2018)'s[1] developed model, which considers the backlogging cost, setup carryover & greenhouse gas emission control to its model complexity. The problem contemplates the Dantzig-Wolfe (D.W.) decomposition to decompose the multi-level capacitated problem into a single-item uncapacitated lot-sizing sub-problem. …
A New Economic Dispatch For Coupled Transmission And Active Distribution Networks Via Hierarchical Communication Structure, Wael T. El-Sayed, Ahmad Sa Awad, Maher Azzouz, Mostafa F. Shaaban
A New Economic Dispatch For Coupled Transmission And Active Distribution Networks Via Hierarchical Communication Structure, Wael T. El-Sayed, Ahmad Sa Awad, Maher Azzouz, Mostafa F. Shaaban
Electrical and Computer Engineering Publications
Traditionally, the economic dispatch problem (EDP) of the bulk generators connected to transmission networks (TNs) is solved in a centralized dispatching center (CDC) while modeling distribution networks as passive loads. With the increasing penetration levels of distributed generation, coordinating the economic dispatch between TNs and active distribution networks (ADNs) became vital to maximizing system efficiency. This article proposes a hierarchical communication structure, which requires minimal upgrades to the CDC, for solving the EDP of coupled TNs and ADNs. Based on the minimal data transfer between the CDC and distribution network operators, the problem is formulated and solved while considering the …