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- 5th International Conference on Porous Media and Their Applications in Science, Engineering and Industry (59)
- Wastewater and Biosolids Treatment and Reuse: Bridging Modeling and Experimental Studies (50)
- Thermal Barrier Coatings IV (47)
- Ultra-High Temperature Ceramics: Materials For Extreme Environmental Applications II (3)
- Biochar: Production, Characterization and Applications (1)
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Articles 31 - 60 of 162
Full-Text Articles in Engineering
High Temperature Environmental Resistance Of Mo-Si-B Alloys And Coatings, John H. Perepezko
High Temperature Environmental Resistance Of Mo-Si-B Alloys And Coatings, John H. Perepezko
Thermal Barrier Coatings IV
No abstract provided.
Mechanical Stability Limits Of Bi-Layer Thermal Barrier Coatings, Mario Rudolphi, Mathias Galetz, Michael Schutze, Martin Frommherz, Alfred Scholz, Mathias Oechsner, Emine Bakan, Robert Vassen, Werner Stamn
Mechanical Stability Limits Of Bi-Layer Thermal Barrier Coatings, Mario Rudolphi, Mathias Galetz, Michael Schutze, Martin Frommherz, Alfred Scholz, Mathias Oechsner, Emine Bakan, Robert Vassen, Werner Stamn
Thermal Barrier Coatings IV
Thermal barrier coatings based on yttria stabilized zirconia (YSZ) have reached a state in development, where a further increase in lifetime and/or maximum operating temperature has become more and more difficult. Nevertheless, the demand for even higher operating temperatures is persisting, and it is pushing the YSZ-based thermal barrier coatings to and beyond their limit. Especially phase instabilities of YSZ at temperatures above 1200°C lead to a fast deterioration of the ceramic top coating. Consequently, the search for new materials with low thermal conductivity, relatively low coefficient of thermal expansion and phase stability at temperatures well above 1200°C was started, …
Specific Failure Modes Of Ni-Base Superalloys And Tbcs Under A Simulated Combustion Gas Atmosphere, Mazaku Okazaki, Satoshi Yamagishi, Y. Hayashi
Specific Failure Modes Of Ni-Base Superalloys And Tbcs Under A Simulated Combustion Gas Atmosphere, Mazaku Okazaki, Satoshi Yamagishi, Y. Hayashi
Thermal Barrier Coatings IV
No abstract provided.
Nasa’S Advanced Environmental Barrier Coatings Development For Sic/Sic Ceramic Matrix Composites: Understanding Cmas Degradations And Resistance, Dongming Zhu
Thermal Barrier Coatings IV
No abstract provided.
Effect Of Variable Porosity On Composite Heat Transfer In A Boundary Layer Flow, Puttabasavsetty Nagaraju
Effect Of Variable Porosity On Composite Heat Transfer In A Boundary Layer Flow, Puttabasavsetty Nagaraju
5th International Conference on Porous Media and Their Applications in Science, Engineering and Industry
The effects of variable porosity and variable thermal conductivity of the medium and also the emission, absorption and scattering of radiation are studied in this paper. The comparative study has been made for three different situations, namely a) variable porosity b) constant porosity and c) absence of porous medium.In carrying out the solution, the momentum and energy equations are coupled and they are solved simultaneously by Runge-Kutta Gill method in conjunction with Newton-Raphson iterative scheme. The results of the analyses show that, in the cases of variable porosity and absence of porous medium the velocity profiles possess very small curvature …
Fractional Diffusion Model For Transport Through Porous Media, Iftikhar Ali, Nadeen Malik, Bilal Chanane
Fractional Diffusion Model For Transport Through Porous Media, Iftikhar Ali, Nadeen Malik, Bilal Chanane
5th International Conference on Porous Media and Their Applications in Science, Engineering and Industry
We model the transport of fluid through porous media in terms of fractional diffusion equation (FDE) for the pressure (,)pxt. Potential application could be to shale gas recovery in tight porous media. Specifically, we pose the time FDE in a finite domain of length L.
Mri Evidence Of Nanoparticles Migration In Drying Porous Media, Emmanuel Keita, Pamela Faure, Stephane Rodts, Phillippe Coussot
Mri Evidence Of Nanoparticles Migration In Drying Porous Media, Emmanuel Keita, Pamela Faure, Stephane Rodts, Phillippe Coussot
5th International Conference on Porous Media and Their Applications in Science, Engineering and Industry
Due to the migration of elements they induce imbibition-drying cycles are known to play a major role in the colloid-facilitated transport in many industrials process, for instance for pollutants migration in soils or pores clogging in building materials. We study the drying of a colloidal suspension in a porous media. The critical physical phenomenon at work here is the displacement and redistribution of colloidal particles induced by evaporation of the liquid phase from the porous medium. This can be clearly seen by filling a bead packing with coffee. Indeed after full drying the sample has shaded tones with darker regions …
Phase Change With Local Thermal Non-Equilibrium In A Two-Phase Mixture Model, Franz Lindner, Michael Pfitzner, Christian Mundt
Phase Change With Local Thermal Non-Equilibrium In A Two-Phase Mixture Model, Franz Lindner, Michael Pfitzner, Christian Mundt
5th International Conference on Porous Media and Their Applications in Science, Engineering and Industry
CFD solutions of multi-phase, single-component flow through a vertical channel, filled with a porous medium, heated from one side, are shown. Steady-state solutions are presented for Darcian flow through capillary porous media. Local thermal non- equilibrium is used with a two-phase mixture. The effects of variation of Peclet-number and dimensionless heat input are shown. The displacement effect of the super-heated vapor reduces the free cross-section of flow of the liquid fluid and accelerates the liquid fluid flowing past the evaporation front. The temperatures, liquid saturations, liquid and vapor heat transfer coefficients are shown for cases with super-heated vapor.
Studies On Permeability Properties And Particle Capture Efficiencies Of Porous Sic Ceramics Processed By Oxide Bonding Technique, Atanu Dey, Nijhuma Kayal, Omprakash Chakrabarti, Rafael Caldato, Caio Andre, Murilo Innocentini, Vadila Guerra
Studies On Permeability Properties And Particle Capture Efficiencies Of Porous Sic Ceramics Processed By Oxide Bonding Technique, Atanu Dey, Nijhuma Kayal, Omprakash Chakrabarti, Rafael Caldato, Caio Andre, Murilo Innocentini, Vadila Guerra
5th International Conference on Porous Media and Their Applications in Science, Engineering and Industry
Porous SiC ceramics bonded with mullite (MBS of fractional porosity (e) of 0.29-0.56, average pore size (dpore) of 5-11 μm, flexural strength (σ) of 9-34 MPa and elastic modulus (E) of 7-28GPa) and cordierite (CBS with e of 0.33-0.72, dpore of 6-50 μm, σ of 5-54 MPa and E of 6-42 GPa) were prepared by heating in air at 1350-1500°C compacts of desired amounts of SiC, Al2O3 and MgO powders and petroleum coke dust as the pore former. Air permeation behavior of well-characterized samples was studied with fluid superficial velocity (vs) from 0.08 to 1.0 m s-1and at RT to …
Effects Of Non-Darcy Flow And Pore Proximity On Gas Condensate Production From Nanopore Unconventional Resources, Alireza Sanaei, Ahmad Jamili, Jeffrey Callard
Effects Of Non-Darcy Flow And Pore Proximity On Gas Condensate Production From Nanopore Unconventional Resources, Alireza Sanaei, Ahmad Jamili, Jeffrey Callard
5th International Conference on Porous Media and Their Applications in Science, Engineering and Industry
Transport properties and mechanisms as well as phase behavior under nanoscale confinement exhibit significant deviations from their bulk behavior. Phase behavior due to the significant effect of molecule-wall interactions as well as molecule-molecule interactions changes in nanopores. Additionally, in nanopores, when the mean free path of molecules is in the order of the pore radius, non-Darcy flow occurs. This phenomenon causes an increase in effective permeability of the flowing fluid. In this study, we focus on analyzing and determining the effect of phase behavior and transport properties change due to pore proximity on production from a shale gas condensate reservoir. …
Performance Comparison Of The Finite-Difference, Practical-Finite-Analytic, Differential-Quadrature, And Differential-Cubature Methods For Solving Porous Media Immiscible Fluids Transport, Faruk Civan
5th International Conference on Porous Media and Their Applications in Science, Engineering and Industry
Reviews and comparisons of the finite-difference, differential-quadrature, differential-cubature, finite-analytic, and practical-finite-analytic methods are presented. Numerical solution of immiscible fluids transport in porous media are illustrated. The cubature and practical finite-analytic methods are shown to have apparent advantages over the other methods because the numerical solution schemes are derived directly from the specific problems of interest.
A Simplified Model For Transport In Aquifers, Robert Mckibbin, Amjad Ali, Winston Sweatman
A Simplified Model For Transport In Aquifers, Robert Mckibbin, Amjad Ali, Winston Sweatman
5th International Conference on Porous Media and Their Applications in Science, Engineering and Industry
Chemicals that are dissolved in groundwater flow along with the slow-moving water as it makes its way through the complex pores of the aquifer; during this process they are dispersed in different directions. The rate of dispersion depends on the porous structure and the fluid speed. Many groundwater aquifers have a natural layered structure; here this is used to advantage by discretizing them into "almost horizontal" layers, where each may have different matrix properties such as thickness, permeability, dispersivity, porosity, etc. The mean dynamic pressure (or mean hydraulic head) may be assumed constant vertically at each horizontal point if it …
Cmas Deposition Within The Turbine Of A Small Jet Engine And Effects On Tbc Spallation, Tw Clyne
Cmas Deposition Within The Turbine Of A Small Jet Engine And Effects On Tbc Spallation, Tw Clyne
Thermal Barrier Coatings IV
No abstract provided.
Probabilistic Lifetime Prediction Of Tbc Coated Parts Considering Design, Operation And Manufacturing + Thermal Barrier Coatings Ageing Mechanisms In Land-Based Gas Turbines, Hans Peter Bossmann, Gregoire Witz
Probabilistic Lifetime Prediction Of Tbc Coated Parts Considering Design, Operation And Manufacturing + Thermal Barrier Coatings Ageing Mechanisms In Land-Based Gas Turbines, Hans Peter Bossmann, Gregoire Witz
Thermal Barrier Coatings IV
A lifing model has been developed based on lab testing to describe the time-temperature-dependence of TBC spallation. An extensive parameter study, using serial parts and coating processes, was done to investigate the affect of manufacturing scatter on TBC life as well as on thermal loading. The impacts of several parameters have been quantified. The transfer to part level has to consider the overall boundary conditions, i.e. increased TBC thickness will reduce on one hand the bondcoat temperature and the risk of spallation, but on the other hand, the increased thickness will increase the stresses within the TBC and the risk …
Attack Of Thermal Barrier Coatings By Molten Silicate Deposits (Sand, Ash) And Its Mitigation, Nitin P. Padture
Attack Of Thermal Barrier Coatings By Molten Silicate Deposits (Sand, Ash) And Its Mitigation, Nitin P. Padture
Thermal Barrier Coatings IV
No abstract provided.
A Thermodynamic Database For Simulation Of Cmas And Tbc Interactions, Lina Kjellqvist, Johan Brattberg, Ake Jansson, Huahai Mao
A Thermodynamic Database For Simulation Of Cmas And Tbc Interactions, Lina Kjellqvist, Johan Brattberg, Ake Jansson, Huahai Mao
Thermal Barrier Coatings IV
A thermodynamic database has been developed for calculating thermochemical interaction of thermal barrier coatings, namely 7YSZ (yttria partially stabilized zirconia), with CaO-MgO-Al2O3-SiO2 (CMAS) deposits. CaO-MgO-Al2O3-SiO2-Y2O3-ZrO2 is thus the core system for understanding and modeling of processes occurring between CMAS and TBC. A good thermodynamic description of all phases in the system is essential in modeling related to materials design and process optimization. An efficient technique used to obtain a self-consistent thermodynamic database is called the CALPHAD method [1], where the Gibbs energy of each phase is described with a mathematical model. The Gibbs energy of the total system is then …
Development Of A Naturalistic Test Media For Dust Ingestion Cmas Testing Of Gas Turbine Engines, Andrew W. Phelps, Lynne Pfledderer
Development Of A Naturalistic Test Media For Dust Ingestion Cmas Testing Of Gas Turbine Engines, Andrew W. Phelps, Lynne Pfledderer
Thermal Barrier Coatings IV
No abstract provided.
Yttrium Oxide A Candidate Material For Environmental And Thermal Barrier Coatings, Peter Mechnich, Wolfgang Braue, Nadine K. Eils, Stefan Hackemann, Ravisankar Naraparaju
Yttrium Oxide A Candidate Material For Environmental And Thermal Barrier Coatings, Peter Mechnich, Wolfgang Braue, Nadine K. Eils, Stefan Hackemann, Ravisankar Naraparaju
Thermal Barrier Coatings IV
No abstract provided.
Examination Of Cmas-Induced Eb-Pvd Tbc Failure, Vladimir Tolpygo
Examination Of Cmas-Induced Eb-Pvd Tbc Failure, Vladimir Tolpygo
Thermal Barrier Coatings IV
No abstract provided.
Tbc Lifetime Under Thermal Gradient Cyclic Testing With Simultaneous Cmas Attack: Towards Prediction Of Advanced Tbc Performance, Daniel Emil Mack, Doris Sebold, Michael Müller, Robert Vaseen, Maria Ophelia Jarligo, Tanja Wobst
Tbc Lifetime Under Thermal Gradient Cyclic Testing With Simultaneous Cmas Attack: Towards Prediction Of Advanced Tbc Performance, Daniel Emil Mack, Doris Sebold, Michael Müller, Robert Vaseen, Maria Ophelia Jarligo, Tanja Wobst
Thermal Barrier Coatings IV
No abstract provided.
Cmas Degradation And Implications For Coating Design, Arlos Levi
Cmas Degradation And Implications For Coating Design, Arlos Levi
Thermal Barrier Coatings IV
No abstract provided.
Aps Tbc Life Prediction - Impact Of Manufacturing Variations, Stefan Lampenscherf, Ramesh Subramanian
Aps Tbc Life Prediction - Impact Of Manufacturing Variations, Stefan Lampenscherf, Ramesh Subramanian
Thermal Barrier Coatings IV
No abstract provided.
Solubility Of Oxides From Zro2-Y2o3 And Zro2-Nd2o3 Systems In A Molten Cas. Selection Of A Thermal Barrier Composition Resistant To Cas Infiltration, Marie-Helene Vidal-Setif, Catherine Rio, Odile Lavigne, Nezha Chellah, Michel Vilasi, Cristophe Rapin, Carine Petitjean, Pierre Jean Panteix
Solubility Of Oxides From Zro2-Y2o3 And Zro2-Nd2o3 Systems In A Molten Cas. Selection Of A Thermal Barrier Composition Resistant To Cas Infiltration, Marie-Helene Vidal-Setif, Catherine Rio, Odile Lavigne, Nezha Chellah, Michel Vilasi, Cristophe Rapin, Carine Petitjean, Pierre Jean Panteix
Thermal Barrier Coatings IV
No abstract provided.
Effect Of Temperature Dependent Viscosity On Natural Convective Boundary Layer Flow Over A Horizontal Plate Embedded In A Nanofluid Saturated Porous Medium, Shoba Bagai, Chandrashekhar Nishad
Effect Of Temperature Dependent Viscosity On Natural Convective Boundary Layer Flow Over A Horizontal Plate Embedded In A Nanofluid Saturated Porous Medium, Shoba Bagai, Chandrashekhar Nishad
5th International Conference on Porous Media and Their Applications in Science, Engineering and Industry
The effect of temperature dependent viscosity on natural convective boundary-layer flow of a nano-fluid over an isothermal horizontal plate is investigated numerically. The viscosity of the fluid is assumed to have an exponentially decaying dependence on temperature ν=ν0e−b(T−T∞). A similarity analysis is presented for field equations embodying conservation of total mass, momentum, thermal energy and nano-particles. The analysis shows that velocity, temperature and nano-particle volume fraction profiles in the respective boundary layers depend on the viscosity parameter γ besides the pertinent parameters such as buoyancy ratio Nr, Brownian motion Nb, thermophoresis Nt and Lewis number Le. From physical considerations one …
Mixed Convection In Horizontal Channels Heated Below With External Heat Losses On Upper Plate And Partially Filled With Aluminum Foam, Bernardo Buonomo, Oronzio Manca, Lorenzo Marinelli, Sergio Nardini
Mixed Convection In Horizontal Channels Heated Below With External Heat Losses On Upper Plate And Partially Filled With Aluminum Foam, Bernardo Buonomo, Oronzio Manca, Lorenzo Marinelli, Sergio Nardini
5th International Conference on Porous Media and Their Applications in Science, Engineering and Industry
In this paper an experimental investigation on mixed convection in air in a heated channel partially filled with an aluminum foam is carried out. The aluminum foam layer is sets on the lower heated wall of the channel. The channel upper plate has a heat transfer toward the external ambient. The investigation allows to evaluate the effect of the aluminum foam on the mixed convection in the heated channel by wall temperature measurements and flow visualization. Results are given for heated channel without and with foam in terms of wall temperature profiles for different Reynolds number value, form 10 to …
Miscible Density Driven Convective Mass Transfer Process Analysis Based On Entransy Dissipation Theory, Rong Li, Ruina Xu, Peixue Jiang, Huihai Liu, Jiannan Chen
Miscible Density Driven Convective Mass Transfer Process Analysis Based On Entransy Dissipation Theory, Rong Li, Ruina Xu, Peixue Jiang, Huihai Liu, Jiannan Chen
5th International Conference on Porous Media and Their Applications in Science, Engineering and Industry
Density driven convective mass transfer process in porous media is one of the most universal phenomena in underground aquifer. In this study, an original model defining Nu (or Sh) number for miscible mass transfer system was derived, based on basic concept of integrated entransy dissipation rate. Numerical simulation results of density driven convective mass transfer process in a closed Hele-Shaw cell and porous media are analyzed. In the process of dilute brine-water mass transfer system in Hele-Shaw cell, three different stages were observed. Meanwhile, time dependent entransy variation and Nu number using our definition also show three different steps in …
Experimental Analysis Of Air Vortex Impingement Through Porous Screens, Xudong An, Howard Fultz, Fatemeh Hassanipour
Experimental Analysis Of Air Vortex Impingement Through Porous Screens, Xudong An, Howard Fultz, Fatemeh Hassanipour
5th International Conference on Porous Media and Their Applications in Science, Engineering and Industry
This paper presents the experimental analysis of air flow vortex propagation through porous screens. This study is conducted by a new and unique experimental setup for ve- locity measurements and visualization of air vortex interac- tion with porous screen. A custom-made, high-precision vortex generator provides a variety of velocity profiles for vortex generation with an unprecedented level of precision. The flow fields are captured with the use of a fog gener- ator and a high-speed CCD camera. The porous screens are constructed out of acrylic rods with various orientations, thickness, and porosities from rod separation. The results presented in this …
Thermohydraulics Of Porous Heat Exchangers: Full Or Partial Blockage?, Kamel Hooman
Thermohydraulics Of Porous Heat Exchangers: Full Or Partial Blockage?, Kamel Hooman
5th International Conference on Porous Media and Their Applications in Science, Engineering and Industry
No abstract provided.
Concentration Of Bioethanol And Dehydration Of Organic Solvents By Porous Membranes, Tadashi Uragami
Concentration Of Bioethanol And Dehydration Of Organic Solvents By Porous Membranes, Tadashi Uragami
5th International Conference on Porous Media and Their Applications in Science, Engineering and Industry
In order to obtain higher membrane performance in the concentration of bioethanol and dehydration of organic solvents, porous poly[1-(trimethylsilyl)-1-propyne] (PTMSP) and porous chitosan membranes, respectively are applied to a temperature-difference controlled evapomeation (TDEV) method in which a temperature difference between the feed solution and the membrane surroundings is established. Pressure treated porous PTMS membranes showed a high ethanol concentration performance with a high permeation rate and porous chitosan membranes also showed a high dehydration performance in TDEV. Membrane performances through these porous membranes in TDEV are discussed from the viewpoints of physical structure of membranes and permeants.
Experimental Evaluation Of Wellbore Cement- Formation Shear Bond Strength In Presence Of Drilling Fluid Contamination, Mileva Radonjic, Arome Oyibo
Experimental Evaluation Of Wellbore Cement- Formation Shear Bond Strength In Presence Of Drilling Fluid Contamination, Mileva Radonjic, Arome Oyibo
5th International Conference on Porous Media and Their Applications in Science, Engineering and Industry
The objective of this experimental study is to investigate the impact of physical and chemical mud contaminations on cement-formation shear bond strength for sandstone and shale formations. Physical contamination occurs when drilling fluids (mud) dehydrates on the surface of the formation, while chemical contamination on the other hand occurs when the drilling fluid (still in the liquid state) is mixed with cement slurry and reacts chemically with the cement during a cementing job. We investigated the impact of the contamination on the shear bond strength and the changes in the mineralogy of the cement at the cement-formation interface to quantify …