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Proceedings Papers

Pore-Scale Simulation of a Tubular Solar Absorber Partially Filled With Raschig Ring Porous Medium for Efficiency Enhancement Purposes

Hossein Ebadi, Antonio Cammi, Nima Fathi, Laura Savoldi
Proc. ASME. POWER2023, ASME Power Applied R&D 2023, V001T05A007, August 6–8, 2023
Publisher: American Society of Mechanical Engineers
Paper No: POWER2023-108768
https://doi.org/10.1115/POWER2023-108768
View Paper titled, Pore-Scale Simulation of a Tubular Solar Absorber Partially Filled With Raschig Ring Porous Medium for Efficiency Enhancement Purposes
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Topics: Porous materials, Simulation, Solar energy, Pressure drop, Fluids, Computational fluid dynamics, Cooling, Flow (Dynamics), Furnaces, Heat
Journal Articles

Computational Framework Development for Heat Transfer Studies in Liquid Metal-Cooled Small-Scale Heat Sinks With Non-Circular Cross Sections

Mahyar Pourghasemi, Nima Fathi
Journal: Journal of Thermal Science and Engineering Applications
Publisher: ASME
Article Type: Research Papers
J. Thermal Sci. Eng. Appl. October 2023, 15(10): 101007.
Paper No: TSEA-22-1554
https://doi.org/10.1115/1.4062833
Published Online: July 25, 2023
View Article titled, Computational Framework Development for Heat Transfer Studies in Liquid Metal-Cooled Small-Scale Heat Sinks With Non-Circular Cross Sections
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Topics: Flow (Dynamics), Heat sinks, Heat transfer, Reynolds number, Turbulence, Cross section (Physics)
Proceedings Papers

Validation and Verification Analyses of Turbulent Forced Convection of Na and NaK in Miniature Heat Sinks

Baixuan Pourghasemi, Nima Fathi
Proc. ASME. VVUQ2023, ASME 2023 Verification, Validation, and Uncertainty Quantification Symposium, V001T06A001, May 17–19, 2023
Publisher: American Society of Mechanical Engineers
Paper No: VVUQ2023-108819
https://doi.org/10.1115/VVUQ2023-108819
View Paper titled, Validation and Verification Analyses of Turbulent Forced Convection of Na and NaK in Miniature Heat Sinks
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Topics: Forced convection, Heat sinks, Turbulence, Convection, Reynolds number, Uncertainty, Computer simulation, Liquid metals, Stainless steel
Proceedings Papers

Numerical Assessment of Hydraulic Properties of Triply Periodic Minimal Surfaces Structures

Cecilia Piatti, Laura Savoldi, Nima Fathi
Proc. ASME. VVUQ2023, ASME 2023 Verification, Validation, and Uncertainty Quantification Symposium, V001T07A001, May 17–19, 2023
Publisher: American Society of Mechanical Engineers
Paper No: VVUQ2023-108794
https://doi.org/10.1115/VVUQ2023-108794
View Paper titled, Numerical Assessment of Hydraulic Properties of Triply Periodic Minimal Surfaces Structures
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Topics: Computational fluid dynamics, Dimensions, Experimental analysis, Flow (Dynamics), Friction, Porosity, Shapes, Thermal hydraulics, Uncertainty, Water
Journal Articles

Enhancement of Liquid Sodium (Na) Forced Convection Within Miniature Heat Sinks

Mahyar Pourghasemi, Nima Fathi
Journal: ASME Journal of Heat and Mass Transfer
Publisher: ASME
Article Type: Research-Article
J. Heat Mass Transfer. May 2023, 145(5): 051801.
Paper No: HT-22-1626
https://doi.org/10.1115/1.4056143
Published Online: January 12, 2023
View Article titled, Enhancement of Liquid Sodium (Na) Forced Convection Within Miniature Heat Sinks
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Topics: Heat sinks, Cladding systems (Building), Sodium, Forced convection
Proceedings Papers

Validation Analysis of Medium-Scale Methanol Pool Fire

Jared Kirsch, Nima Fathi, Joshua Hubbard
Proc. ASME. VVUQ2022, ASME 2022 Verification, Validation, and Uncertainty Quantification Symposium, V001T07A001, May 25–26, 2022
Publisher: American Society of Mechanical Engineers
Paper No: VVS2022-86806
https://doi.org/10.1115/VVS2022-86806
View Paper titled, Validation Analysis of Medium-Scale Methanol Pool Fire
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Topics: Flow (Dynamics), Liquid pool fires, Methanol, Turbulence
Proceedings Papers

Verification Assessment of Thermal Models in Conjugate Heat Transfer Analysis of Small-Scale Heat Sinks

Mahyar Pourghasemi, Nima Fathi
Proc. ASME. VVUQ2022, ASME 2022 Verification, Validation, and Uncertainty Quantification Symposium, V001T07A003, May 25–26, 2022
Publisher: American Society of Mechanical Engineers
Paper No: VVS2022-86822
https://doi.org/10.1115/VVS2022-86822
View Paper titled, Verification Assessment of Thermal Models in Conjugate Heat Transfer Analysis of Small-Scale Heat Sinks
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Topics: Heat sinks, Heat transfer, Cladding systems (Building), Heat conduction, Reliability, Shells, Computer simulation, Computer software, Convection, Flow (Dynamics)
Journal Articles

Probing the Accuracy of Experimental Data on Nusselt Numbers Within Miniature Heat Sinks

Mahyar Pourghasemi, Nima Fathi
Journal: Journal of Thermal Science and Engineering Applications
Publisher: ASME
Article Type: Research Papers
J. Thermal Sci. Eng. Appl. November 2022, 14(11): 111001.
Paper No: TSEA-22-1053
https://doi.org/10.1115/1.4054303
Published Online: June 14, 2022
View Article titled, Probing the Accuracy of Experimental Data on Nusselt Numbers Within Miniature Heat Sinks
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Topics: Heat sinks, Microchannels, Microscale devices, Heat flux, Heat conduction, Contact resistance, Reynolds number, Temperature, Wall temperature, Fluids
Journal Articles

Theoretical Approach for the Fast Estimation of the Turbulent Kinematic Viscosity for Internal Flows

Sal Rodriguez, Nima Fathi, Mahyar Pourghasemi
Journal: Journal of Nuclear Engineering and Radiation Science
Publisher: ASME
Article Type: Technical Briefs
ASME J of Nuclear Rad Sci. July 2022, 8(3): 034502.
Paper No: NERS-20-1213
https://doi.org/10.1115/1.4054342
Published Online: May 26, 2022
View Article titled, Theoretical Approach for the Fast Estimation of the Turbulent Kinematic Viscosity for Internal Flows
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Topics: Flow (Dynamics), Internal flow, Kinematics, Turbulence, Viscosity, Simulation, Eddies (Fluid dynamics)
Proceedings Papers

Fluid Flow and Heat Transfer of Liquid Sodium in Small-Scale Heat Sinks With Different Geometries

Mahyar Pourghasemi, Nima Fathi
Proc. ASME. FEDSM2021, Volume 3: Fluid Mechanics; Micro and Nano Fluid Dynamics; Multiphase Flow, V003T07A011, August 10–12, 2021
Publisher: American Society of Mechanical Engineers
Paper No: FEDSM2021-65869
https://doi.org/10.1115/FEDSM2021-65869
View Paper titled, Fluid Flow and Heat Transfer of Liquid Sodium in Small-Scale Heat Sinks With Different Geometries
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Topics: Fluid dynamics, Heat sinks, Heat transfer, Sodium, Flow (Dynamics), Reynolds number, Computer simulation, Convection, Cross section (Physics), Laminar flow
Proceedings Papers

Asymmetrical Heat Distribution Pattern in Miniature Heat Sinks Due to Conjugate Heat Transfer

Mahyar Pourghasemi, Nima Fathi
Proc. ASME. VVS2021, ASME 2021 Verification and Validation Symposium, V001T06A003, May 19–20, 2021
Publisher: American Society of Mechanical Engineers
Paper No: VVS2021-65325
https://doi.org/10.1115/VVS2021-65325
View Paper titled, Asymmetrical Heat Distribution Pattern in Miniature Heat Sinks Due to Conjugate Heat Transfer
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Topics: Heat, Heat sinks, Heat transfer, Microchannels, Water, Computer simulation, Numerical analysis, Reynolds number
Proceedings Papers

Error Quantification of Nusselt Number Analysis in Miniature Heat Sinks: Verification and Validation Assessment

Mahyar Pourghasemi, Nima Fathi
Proc. ASME. VVS2021, ASME 2021 Verification and Validation Symposium, V001T06A004, May 19–20, 2021
Publisher: American Society of Mechanical Engineers
Paper No: VVS2021-65326
https://doi.org/10.1115/VVS2021-65326
View Paper titled, Error Quantification of Nusselt Number Analysis in Miniature Heat Sinks: Verification and Validation Assessment
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Topics: Errors, Heat sinks, Flow (Dynamics), Microchannels, Uncertainty, Water, Computer simulation, Heat flux, Heat transfer, Microscale devices
Proceedings Papers

Response Effects Due to Polygonal Representation of Pores in Porous Media Thermal Models

Kevin W. Irick, Nima Fathi
Proc. ASME. VVS2021, ASME 2021 Verification and Validation Symposium, V001T09A001, May 19–20, 2021
Publisher: American Society of Mechanical Engineers
Paper No: VVS2021-65231
https://doi.org/10.1115/VVS2021-65231
View Paper titled, Response Effects Due to Polygonal Representation of Pores in Porous Media Thermal Models
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Topics: Porous materials, Errors, Finite element methods, Geometry, Uncertainty, Computer simulation, Construction, Engineering models, Engineering simulation, Engineering systems and industry applications
Journal Articles

Computational Evaluation of Thermal Response of Open-Cell Foam With Circular Pore

Kevin W. Irick, Nima Fathi
Journal: Journal of Verification, Validation and Uncertainty Quantification
Publisher: ASME
Article Type: Research-Article
J. Verif. Valid. Uncert. March 2021, 6(1): 011004.
Paper No: VVUQ-20-1025
https://doi.org/10.1115/1.4049323
Published Online: February 1, 2021
View Article titled, Computational Evaluation of Thermal Response of Open-Cell Foam With Circular Pore
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Topics: Porosity, Porous materials, Temperature, Thermal conductivity, Uncertainty, Simulation, Heat, Composite materials, Finite element methods, Finite element analysis
Proceedings Papers

Evaluation of Pore Geometry Effects on Porous Cell Thermal Behavior

Kevin Irick, Nima Fathi
Proc. ASME. VVS2020, ASME 2020 Verification and Validation Symposium, V001T08A002, May 20–22, 2020
Publisher: American Society of Mechanical Engineers
Paper No: VVS2020-8835
https://doi.org/10.1115/VVS2020-8835
View Paper titled, Evaluation of Pore Geometry Effects on Porous Cell Thermal Behavior
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Topics: Geometry, Porous materials, Finite element methods, Shapes, Thermal conductivity, Bulk solids, Design, Energy industry, Flow (Dynamics), FORTRAN
Proceedings Papers

High-Fidelity Calculation of Effective Thermal Response of Composite Media With Heat Generation Source

Kevin Irick, Nima Fathi
Proc. ASME. VVS2020, ASME 2020 Verification and Validation Symposium, V001T08A003, May 20–22, 2020
Publisher: American Society of Mechanical Engineers
Paper No: VVS2020-8836
https://doi.org/10.1115/VVS2020-8836
View Paper titled, High-Fidelity Calculation of Effective Thermal Response of Composite Media With Heat Generation Source
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Topics: Composite materials, Heat, Thermal conductivity, Fillers (Materials), Nuclear fuels, Finite element methods, Fuels, Heat transfer, Computer simulation, FORTRAN
Proceedings Papers

Thermal-Fluid Analysis and Optimization of Micro-Scale Heat Sinks With Slip Boundary Condition Using Entropy Generation Minimization Method

Mahyar Pourghasemi, Nima Fathi, Kevin R. Anderson
Proc. ASME. FEDSM2020, Volume 1: Fluid Applications and Systems; Fluid Measurement and Instrumentation, V001T01A017, July 13–15, 2020
Publisher: American Society of Mechanical Engineers
Paper No: FEDSM2020-20478
https://doi.org/10.1115/FEDSM2020-20478
View Paper titled, Thermal-Fluid Analysis and Optimization of Micro-Scale Heat Sinks With Slip Boundary Condition Using Entropy Generation Minimization Method
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Topics: Boundary-value problems, Entropy, Heat sinks, Microscale devices, Optimization, Thermofluids
Proceedings Papers

Multiphase Flow Development on Single Particle Migration in Low Reynolds Number Fluid Domains

Mahyar Pourghasemi, Nima Fathi, Peter Vorobieff, Goodarz Ahmadi, Kevin R. Anderson
Proc. ASME. FEDSM2020, Volume 2: Fluid Mechanics; Multiphase Flows, V002T04A038, July 13–15, 2020
Publisher: American Society of Mechanical Engineers
Paper No: FEDSM2020-20477
https://doi.org/10.1115/FEDSM2020-20477
View Paper titled, Multiphase Flow Development on Single Particle Migration in Low Reynolds Number Fluid Domains
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Topics: Fluids, Multiphase flow, Particulate matter, Reynolds number
Proceedings Papers

Computational Evaluation of Thermal Barrier Coatings: Two-Phase Thermal Transport Analysis

Kevin Irick, Nima Fathi
Proc. ASME. VVS2019, ASME 2019 Verification and Validation Symposium, V001T12A002, May 15–17, 2019
Publisher: American Society of Mechanical Engineers
Paper No: VVS2019-5134
https://doi.org/10.1115/VVS2019-5134
View Paper titled, Computational Evaluation of Thermal Barrier Coatings: Two-Phase Thermal Transport Analysis
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Topics: Thermal barrier coatings, Thermal conductivity, Finite element analysis, Cooling, Gas turbines, Porous materials, Temperature, Uncertainty, Coatings, Composite materials
Proceedings Papers

Thermal Response of Open-Cell Porous Materials: A Numerical Study and Model Assessment

Kevin Irick, Nima Fathi
Proc. ASME. VVS2018, ASME 2018 Verification and Validation Symposium, V001T03A002, May 16–18, 2018
Publisher: American Society of Mechanical Engineers
Paper No: VVS2018-9317
https://doi.org/10.1115/VVS2018-9317
View Paper titled, Thermal Response of Open-Cell Porous Materials: A Numerical Study and Model Assessment
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Topics: Porous materials, Thermal conductivity, Finite element methods, Porosity, Composite materials, Electronic packaging, Manufacturing, Materials properties, Modeling, Municipal solid wastes