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Proceedings Papers

Impact of Number of Blades and Solidity on the Performance of a Darrieus Vertical Axis Wind Turbine With Helical Blades

Ahmed S. Saad, Mahmoud Ahmed
Proc. ASME. IMECE2023, Volume 7: Energy, V007T08A069, October 29–November 2, 2023
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2023-113651
https://doi.org/10.1115/IMECE2023-113651
View Paper titled, Impact of Number of Blades and Solidity on the Performance of a Darrieus Vertical Axis Wind Turbine With Helical Blades
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Topics: Blades, Rotors, Vertical axis wind turbines
Proceedings Papers

An Investigation of the Influences of Diameter Ratio and Attaching Angle on the Performance of a Helical-Bladed Combined Darrieus-Savonius Wind Turbine

Ahmed S. Saad, Mahmoud Ahmed
Proc. ASME. IMECE2023, Volume 7: Energy, V007T08A070, October 29–November 2, 2023
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2023-113686
https://doi.org/10.1115/IMECE2023-113686
View Paper titled, An Investigation of the Influences of Diameter Ratio and Attaching Angle on the Performance of a Helical-Bladed Combined Darrieus-Savonius Wind Turbine
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Topics: Savonius wind turbines, Turbines, Wind turbines, Design, Rotors, Torque, Dimensions, Blades, Cycles, Drag (Fluid dynamics)
Proceedings Papers

Performance Improvement of Savonius-Type Hydrokinetic Turbine With Bucket Airfoil Profile

Shehab Osama, Mohamed Emam, Shinichi Ookawara, Mahmoud Ahmed
Proc. ASME. GT2023, Volume 14: Wind Energy, V014T37A010, June 26–30, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GT2023-103209
https://doi.org/10.1115/GT2023-103209
View Paper titled, Performance Improvement of Savonius-Type Hydrokinetic Turbine With Bucket Airfoil Profile
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Topics: Airfoils, Hydraulic turbines, Savonius wind turbines
Proceedings Papers

The Potential and Limitations of Using Geothermal-Sourced Chiller Plants to Eliminate Cooling Towers

Ahmed Farag, Mahmoud Ahmed, Shinichi Ookawara, Mohamed Emam
Proc. ASME. IMECE2022, Volume 6: Energy, V006T08A030, October 30–November 3, 2022
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2022-96657
https://doi.org/10.1115/IMECE2022-96657
View Paper titled, The Potential and Limitations of Using Geothermal-Sourced Chiller Plants to Eliminate Cooling Towers
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Topics: Cooling towers, Geothermal engineering, Heat exchangers
Proceedings Papers

Potentials and Limitations of Concentrator Silicon Solar Cells Energy Utilization

Mohamed M. Elsabahy, Mohamed Emam, Hidetoshi Sekiguchi, Mahmoud Ahmed
Proc. ASME. IMECE2022, Volume 6: Energy, V006T08A056, October 30–November 3, 2022
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2022-95678
https://doi.org/10.1115/IMECE2022-95678
View Paper titled, Potentials and Limitations of Concentrator Silicon Solar Cells Energy Utilization
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Topics: Heat sinks, Silicon, Solar cells
Proceedings Papers

Performance Enhancement of New Concentrator Photovoltaic System Using Phase Change Material/Water Cooling Technique

Mohamed M. Elsabahy, Mahmoud Ahmed, Mohamed Emam
Proc. ASME. IMECE2022, Volume 6: Energy, V006T08A054, October 30–November 3, 2022
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2022-95514
https://doi.org/10.1115/IMECE2022-95514
View Paper titled, Performance Enhancement of New Concentrator Photovoltaic System Using Phase Change Material/Water Cooling Technique
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Topics: Cooling, Phase change materials, Photovoltaic power systems, Water
Proceedings Papers

Is the Blood Flow Laminar or Turbulent at Stenosed Coronary Artery?

Muhamed Albadawi, Yasser Abuouf, Samir Elsagheer, Hidetoshi Sekiguchi, Shinichi Ookawara, Mahmoud Ahmed
Proc. ASME. IMECE2022, Volume 4: Biomedical and Biotechnology; Design, Systems, and Complexity, V004T05A032, October 30–November 3, 2022
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2022-95594
https://doi.org/10.1115/IMECE2022-95594
View Paper titled, Is the Blood Flow Laminar or Turbulent at Stenosed Coronary Artery?
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Topics: Blood flow, Coronary arteries, Flow (Dynamics), Turbulence
Proceedings Papers

Non-Newtonian Blood Flow in a Diseased Abdominal Aortic Arterial Segment Under the Effect of an External Magnetic Field: A Numerical Study

Ahmed Elhanafy, Yasser Abuouf, Shinichi Ookawara, Mahmoud Ahmed
Proc. ASME. IMECE2022, Volume 4: Biomedical and Biotechnology; Design, Systems, and Complexity, V004T05A029, October 30–November 3, 2022
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2022-95336
https://doi.org/10.1115/IMECE2022-95336
View Paper titled, Non-Newtonian Blood Flow in a Diseased Abdominal Aortic Arterial Segment Under the Effect of an External Magnetic Field: A Numerical Study
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Topics: Aneurysms, Blood flow, Magnetic fields, Non-Newtonian fluids, Shear stress, Blood, Computer simulation, Flow (Dynamics), Hemodynamics, Magnetic resonance imaging
Proceedings Papers

Numerical Simulation of Aggregation and Deformation of Red Blood Cells in Microchannels With Different Stenosis Severities

Ahmed Elhanafy, Yasser Abuouf, Samir Elsagheer, Shinichi Ookawara, Mahmoud Ahmed
Proc. ASME. IMECE2022, Volume 4: Biomedical and Biotechnology; Design, Systems, and Complexity, V004T05A030, October 30–November 3, 2022
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2022-95360
https://doi.org/10.1115/IMECE2022-95360
View Paper titled, Numerical Simulation of Aggregation and Deformation of Red Blood Cells in Microchannels With Different Stenosis Severities
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Topics: Computer simulation, Deformation, Erythrocytes, Lattice Boltzmann methods, Microchannels, Blood flow, Modeling, Blood, Cardiovascular system, Cell membranes
Proceedings Papers

Numerical Study on the Performance of Hybrid Darrieus-Savonius Vertical Axis Wind Turbines Having Twisted Blades

Ahmed S. Saad, Mahmoud Ahmed
Proc. ASME. GT2022, Volume 11: Wind Energy, V011T38A002, June 13–17, 2022
Publisher: American Society of Mechanical Engineers
Paper No: GT2022-80201
https://doi.org/10.1115/GT2022-80201
View Paper titled, Numerical Study on the Performance of Hybrid Darrieus-Savonius Vertical Axis Wind Turbines Having Twisted Blades
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Topics: Blades, Design, Savonius wind turbines, Turbines, Vertical axis wind turbines
Proceedings Papers

Effect of Twist Angle on the Performance of Darrieus Vertical Axis Wind Turbines

Ahmed S. Saad, Mahmoud Ahmed
Proc. ASME. GT2022, Volume 11: Wind Energy, V011T38A001, June 13–17, 2022
Publisher: American Society of Mechanical Engineers
Paper No: GT2022-80198
https://doi.org/10.1115/GT2022-80198
View Paper titled, Effect of Twist Angle on the Performance of Darrieus Vertical Axis Wind Turbines
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Topics: Blades, Computer simulation, Cycles, Design, Flow (Dynamics), Fluctuations (Physics), Navier-Stokes equations, Oscillations, Rotation, Rotors
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
Publisher: ASME
Article Type: Research Papers
J. Energy Resour. Technol. July 2022, 144(7): 070911.
Paper No: JERT-21-1711
https://doi.org/10.1115/1.4053675
Published Online: March 2, 2022
View Article titled, Performance of Two-Dimensional Functionally Graded Anode Supported Solid-Oxide Fuel Cells
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Topics: Anodes, Design, Electrodes, Operating temperature, Power density, Solid oxide fuel cells, Stress, Temperature, Thermal stresses, Electrolytes
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
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2021-71590
https://doi.org/10.1115/IMECE2021-71590
View Paper titled, Effect of Stenosis Location on the Flow Distribution in Coronary Branches: Experimental and Numerical Study
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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
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2021-71625
https://doi.org/10.1115/IMECE2021-71625
View Paper titled, Influence of Arterial Wall Elasticity on Blood Flow Dynamic Factors of Stenotic Carotid Artery
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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

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
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2021-72603
https://doi.org/10.1115/IMECE2021-72603
View Paper titled, A Two-Phase Flow Study on Carbon Dioxide Bubbles Evolution in Direct-Methanol Fuel Cells With Degassing Channels
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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
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2021-72922
https://doi.org/10.1115/IMECE2021-72922
View Paper titled, Mass Transport and Thermal Stresses Evaluation of Micro Solid-Oxide Fuel Cells: A Numerical Study
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Topics: Fuel cells, Solid oxide fuel cells, Thermal stresses
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
Publisher: American Society of Mechanical Engineers
Paper No: ES2021-63914
https://doi.org/10.1115/ES2021-63914
View Paper titled, Performance Study of Thermoelectric Power Generators at Different Geometrical Configurations
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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
Publisher: American Society of Mechanical Engineers
Paper No: ES2021-63582
https://doi.org/10.1115/ES2021-63582
View Paper titled, Performance of Two-Dimensional Functionally Graded Anode Supported Solid-Oxide Fuel Cells
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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
Publisher: ASME
Article Type: Research Papers
J. Energy Resour. Technol. January 2022, 144(1): 011301.
Paper No: JERT-21-1033
https://doi.org/10.1115/1.4050876
Published Online: May 6, 2021
View Article titled, Influence of Varying the Stage Aspect Ratio on the Performance of Multi-Stage Savonius Wind Rotors
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Topics: Rotors, Savonius wind turbines, Torque
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
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2020-23451
https://doi.org/10.1115/IMECE2020-23451
View Paper titled, Influence of Carotid Artery Stenosis Location on Lesion Progression Using Computational Fluid Dynamics
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Topics: Atherosclerosis, Carotid arteries, Computational fluid dynamics