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Journal Articles

Performance of Two-Dimensional Functionally Graded Anode Supported Solid-Oxide Fuel Cells

Sameer Osman, Khaled Ahmed, Mahmoud Ahmed
Journal: Journal of Energy Resources Technology
Article Type: Research Papers
J. Energy Resour. Technol. July 2022, 144(7): 070911.
Paper No: JERT-21-1711
DOI: https://doi.org/10.1115/1.4053675
Published Online: March 2, 2022
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Topics: Anodes, Design, Electrodes, Operating temperature, Power density, Solid oxide fuel cells, Stress, Temperature, Thermal stresses, Electrolytes
Proceedings Papers

A Two-Phase Flow Study on Carbon Dioxide Bubbles Evolution in Direct-Methanol Fuel Cells With Degassing Channels

Sameer Osman, Mahmoud Ahmed
Proc. ASME. IMECE2021, Volume 8B: Energy, V08BT08A005, November 1–5, 2021
Paper No: IMECE2021-72603
DOI: https://doi.org/10.1115/IMECE2021-72603
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Topics: Bubbles, Carbon dioxide, Direct methanol fuel cells, Fuel cells, Two-phase flow
Proceedings Papers

Mass Transport and Thermal Stresses Evaluation of Micro Solid-Oxide Fuel Cells: A Numerical Study

Sameer Osman, Mahmoud Ahmed
Proc. ASME. IMECE2021, Volume 8B: Energy, V08BT08A006, November 1–5, 2021
Paper No: IMECE2021-72922
DOI: https://doi.org/10.1115/IMECE2021-72922
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Topics: Fuel cells, Solid oxide fuel cells, Thermal stresses
Proceedings Papers

Effect of Stenosis Location on the Flow Distribution in Coronary Branches: Experimental and Numerical Study

Yasser Abuouf, Muhamed Albadawi, Mahmoud Ahmed
Proc. ASME. IMECE2021, Volume 5: Biomedical and Biotechnology, V005T05A024, November 1–5, 2021
Paper No: IMECE2021-71590
DOI: https://doi.org/10.1115/IMECE2021-71590
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Topics: Coronary arteries, Diseases, Flow (Dynamics), Bifurcation, Blood, Blood flow, Blood vessels, Computational fluid dynamics, Computer-aided design
Proceedings Papers

Influence of Arterial Wall Elasticity on Blood Flow Dynamic Factors of Stenotic Carotid Artery

Muhamed Albadawi, Yasser Abuouf, Mahmoud Ahmed
Proc. ASME. IMECE2021, Volume 5: Biomedical and Biotechnology, V005T05A038, November 1–5, 2021
Paper No: IMECE2021-71625
DOI: https://doi.org/10.1115/IMECE2021-71625
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Topics: Blood flow, Carotid arteries, Computational fluid dynamics, Elasticity, Flow (Dynamics), Blood, Fluid structure interaction, Blood vessels, Atherosclerosis, Boundary-value problems
Proceedings Papers

Performance Study of Thermoelectric Power Generators at Different Geometrical Configurations

Mohamed M. Elsabahy, Ramy Rabie, Mahmoud Ahmed
Proc. ASME. ES2021, ASME 2021 15th International Conference on Energy Sustainability, V001T05A004, June 16–18, 2021
Paper No: ES2021-63914
DOI: https://doi.org/10.1115/ES2021-63914
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Topics: Boundary-value problems, Generators, Shapes, Thermocouples, Dimensions, Prisms (Optics), Blocks (Building materials), Cooling, Geometry, Manufacturing
Proceedings Papers

Performance of Two-Dimensional Functionally Graded Anode Supported Solid-Oxide Fuel Cells

Sameer Osman, Khaled Ahmed, Mahmoud Ahmed
Proc. ASME. ES2021, ASME 2021 15th International Conference on Energy Sustainability, V001T04A001, June 16–18, 2021
Paper No: ES2021-63582
DOI: https://doi.org/10.1115/ES2021-63582
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Topics: Anodes, Fuel cells, Solid oxide fuel cells
Journal Articles

Influence of Varying the Stage Aspect Ratio on the Performance of Multi-Stage Savonius Wind Rotors

Ahmed S. Saad, Shinichi Ookawara, Mahmoud Ahmed
Journal: Journal of Energy Resources Technology
Article Type: Research Papers
J. Energy Resour. Technol. January 2022, 144(1): 011301.
Paper No: JERT-21-1033
DOI: https://doi.org/10.1115/1.4050876
Published Online: May 6, 2021
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Topics: Rotors, Savonius wind turbines, Torque
Proceedings Papers

Assessment of Invasive Fractional Flow Reserve Procedures Using Computational Fluid Dynamics

Yasser Abuouf, Muhamed Albadawi, Shinichi Ookawara, Mahmoud Ahmed
Proc. ASME. IMECE2020, Volume 5: Biomedical and Biotechnology, V005T05A030, November 16–19, 2020
Paper No: IMECE2020-23401
DOI: https://doi.org/10.1115/IMECE2020-23401
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Topics: Computational fluid dynamics, Flow (Dynamics)
Proceedings Papers

Influence of Carotid Artery Stenosis Location on Lesion Progression Using Computational Fluid Dynamics

Muhamed Albadawi, Yasser Abuouf, Shinichi Ookawara, Mahmoud Ahmed
Proc. ASME. IMECE2020, Volume 5: Biomedical and Biotechnology, V005T05A031, November 16–19, 2020
Paper No: IMECE2020-23451
DOI: https://doi.org/10.1115/IMECE2020-23451
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Topics: Atherosclerosis, Carotid arteries, Computational fluid dynamics
Proceedings Papers

Effect of the Number of Stages on the Performance of Savonius Vertical Axis Wind Turbines: Part I — Using Straight Semicircular Blades

Ahmed S. Saad, Shinichi Ookawara, Ahmed Elwardany, Ibrahim I. El-Sharkawy, Mahmoud Ahmed
Proc. ASME. IMECE2020, Volume 10: Fluids Engineering, V010T10A058, November 16–19, 2020
Paper No: IMECE2020-23555
DOI: https://doi.org/10.1115/IMECE2020-23555
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Topics: Blades, Rotors, Savonius wind turbines, Vertical axis wind turbines
Proceedings Papers

Effect of the Number of Stages on the Performance of Savonius Vertical Axis Wind Turbines: Part II — Using Twisted Blades

Ahmed S. Saad, Shinichi Ookawara, Ahmed Elwardany, Ibrahim I. El-Sharkawy, Mahmoud Ahmed
Proc. ASME. IMECE2020, Volume 10: Fluids Engineering, V010T10A059, November 16–19, 2020
Paper No: IMECE2020-23574
DOI: https://doi.org/10.1115/IMECE2020-23574
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Topics: Blades, Rotors, Savonius wind turbines, Vertical axis wind turbines
Journal Articles

Carbon Dioxide Bubbles Removal by Capillary Actuation in the Anode Channel of Direct Methanol Fuel Cells

Sameer Osman, Shinichi Ookawara, Mahmoud Ahmed
Journal: Journal of Energy Resources Technology
Article Type: Research Papers
J. Energy Resour. Technol. September 2021, 143(9): 090903.
Paper No: JERT-20-1792
DOI: https://doi.org/10.1115/1.4049288
Published Online: January 15, 2021
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Topics: Anodes, Bubbles, Carbon dioxide, Diffusion (Physics), Direct methanol fuel cells, Flow (Dynamics), Methanol
Proceedings Papers

Effect of Anode Flow Channel Design on the Carbon Dioxide Bubble Removal in Direct Methanol Fuel Cells

Sameer Osman, Shinichi Ookawara, Mahmoud Ahmed
Proc. ASME. ES2020, ASME 2020 14th International Conference on Energy Sustainability, V001T05A003, June 17–18, 2020
Paper No: ES2020-1659
DOI: https://doi.org/10.1115/ES2020-1659
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Topics: Anodes, Bubbles, Carbon dioxide, Design, Direct methanol fuel cells, Flow (Dynamics)
Proceedings Papers

Influence of Fractional Flow Reserve Setting on the Procedure Precision

Yasser Abuouf, Shinichi Ookawara, Mahmoud Ahmed
Proc. ASME. IMECE2019, Volume 3: Biomedical and Biotechnology Engineering, V003T04A034, November 11–14, 2019
Paper No: IMECE2019-10427
DOI: https://doi.org/10.1115/IMECE2019-10427
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Topics: Flow (Dynamics)
Proceedings Papers

Enhancing Fractional Flow Reserve Procedure in Stenosis Diagnosis

Yasser Abuouf, Shinichi Ookawara, Mahmoud Ahmed
Proc. ASME. IMECE2019, Volume 3: Biomedical and Biotechnology Engineering, V003T04A002, November 11–14, 2019
Paper No: IMECE2019-10425
DOI: https://doi.org/10.1115/IMECE2019-10425
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Topics: Flow (Dynamics)
Proceedings Papers

Performance Analysis of Concentrator Photovoltaic/Microchannel Heat Sink System Using Nanofluid

Ali Radwan, Mohamed M. Awad, Shinichi Ookawara, Mahmoud Ahmed
Proc. ASME. ICNMM2019, ASME 2019 17th International Conference on Nanochannels, Microchannels, and Minichannels, V001T11A001, June 23–26, 2019
Paper No: ICNMM2019-4256
DOI: https://doi.org/10.1115/ICNMM2019-4256
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Topics: Heat sinks, Microchannels, Nanofluids, Cooling, Ethanol, Flow (Dynamics), Solar cells, Temperature, Circuits, Coolants
Proceedings Papers

Performance of Concentrator Photovoltaic Systems Integrated With Double Layer Microchannel Heat Sink

Ali Radwan, Mohamed M. Awad, Shinichi Ookawara, Mahmoud Ahmed
Proc. ASME. ICNMM2019, ASME 2019 17th International Conference on Nanochannels, Microchannels, and Minichannels, V001T11A002, June 23–26, 2019
Paper No: ICNMM2019-4259
DOI: https://doi.org/10.1115/ICNMM2019-4259
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Topics: Heat sinks, Microchannels, Photovoltaic power systems, Flow (Dynamics), Boiling, Cooling, Coolants, Solar cells, Temperature, Design
Proceedings Papers

Modelling and Simulation of Homogeneous Charge Compression Ignition Engine Fueled by Biodiesel

Meshack Hawi, Mahmoud Ahmed, Shinichi Ookawara
Proc. ASME. POWER2018, Volume 1: Fuels, Combustion, and Material Handling; Combustion Turbines Combined Cycles; Boilers and Heat Recovery Steam Generators; Virtual Plant and Cyber-Physical Systems; Plant Development and Construction; Renewable Energy Systems, V001T01A003, June 24–28, 2018
Paper No: POWER2018-7202
DOI: https://doi.org/10.1115/POWER2018-7202
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Topics: Biodiesel, Homogeneous charge compression ignition engines, Modeling, Simulation, Compression, Emissions, Combustion, Ignition, Engines, Fuels
Proceedings Papers

Cooling of Concentrator Photovoltaic Cells Using Mini-Scale Jet Impingement Heat Sinks

Ali Radwan, Meshack Hawi, Mahmoud Ahmed
Proc. ASME. ES2018, ASME 2018 12th International Conference on Energy Sustainability, V001T12A004, June 24–28, 2018
Paper No: ES2018-7569
DOI: https://doi.org/10.1115/ES2018-7569
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Topics: Cooling, Heat sinks, Photovoltaic cells, Temperature, Coolants, Heat transfer, Design, Drainage, Electrical efficiency, Fluid dynamics