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Elia Merzari
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Proceedings Papers

Validation of Low and High-Fidelity Turbulence Models for Prediction of Turbulent Heat Transfer in Low Prandtl Number Flows Under Buoyant and Separated Flow Conditions

Mohammed El Mellouki, Shanti Bhushan, Chris Pilmaier, D. K. Walters, Michael Gorman, Brent Hollrah, Y. A. Hassan, Elia Merzari, Aleksandr Obabko, M. B. Dzodzo
Proc. ASME. FEDSM2022, Volume 2: Multiphase Flow (MFTC); Computational Fluid Dynamics (CFDTC); Micro and Nano Fluid Dynamics (MNFDTC), V002T05A008, August 3–5, 2022
Paper No: FEDSM2022-86863
DOI: https://doi.org/10.1115/FEDSM2022-86863
View Paper titled, Validation of Low and High-Fidelity Turbulence Models for Prediction of Turbulent Heat Transfer in Low Prandtl Number Flows Under Buoyant and Separated Flow Conditions
Click here to open pdf in another window PDF for Validation of Low and High-Fidelity Turbulence Models for Prediction of Turbulent Heat Transfer in Low Prandtl Number Flows Under Buoyant and Separated Flow Conditions
Topics: Channel flow, Flow (Dynamics), Fuel rods, Pipes, Prandtl number, Turbulence, Turbulent heat transfer
Proceedings Papers

Large Eddy Simulation of Random Pebble Bed Using the Spectral Element Method

Tri Nguyen, Elia Merzari, Haomin Yuan, Dezhi Dai, Brian Jackson
Proc. ASME. HT2022, ASME 2022 Heat Transfer Summer Conference, V001T20A009, July 11–13, 2022
Paper No: HT2022-87117
DOI: https://doi.org/10.1115/HT2022-87117
View Paper titled, Large Eddy Simulation of Random Pebble Bed Using the Spectral Element Method
Click here to open pdf in another window PDF for Large Eddy Simulation of Random Pebble Bed Using the Spectral Element Method
Topics: Large eddy simulation, Heat transfer, Flow (Dynamics), Power density, Accidents, Computational fluid dynamics, Computer simulation, Convection, Coolants, Cooling
Proceedings Papers

Study on Laminar Turbulent Transition in Square Arrayed Rod Bundles

Carolina S. B. Dutra, Elia Merzari
Proc. ASME. ICONE28, Volume 4: Student Paper Competition, V004T14A081, August 4–6, 2021
Paper No: ICONE28-65706
DOI: https://doi.org/10.1115/ICONE28-65706
View Paper titled, Study on Laminar Turbulent Transition in Square Arrayed Rod Bundles
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Topics: Fuel rods, Turbulence
Proceedings Papers

Comparison of Pebble Bed Velocity Profiles Between High-Fidelity and Intermediate-Fidelity Codes

David Reger, Elia Merzari, Paolo Balestra, Sebastian Schunert, Yassin A. Hassan
Proc. ASME. ICONE28, Volume 4: Student Paper Competition, V004T14A086, August 4–6, 2021
Paper No: ICONE28-65759
DOI: https://doi.org/10.1115/ICONE28-65759
View Paper titled, Comparison of Pebble Bed Velocity Profiles Between High-Fidelity and Intermediate-Fidelity Codes
Click here to open pdf in another window PDF for Comparison of Pebble Bed Velocity Profiles Between High-Fidelity and Intermediate-Fidelity Codes
Topics: Accidents, Computational fluid dynamics, Cooling, Drag (Fluid dynamics), Flow (Dynamics), Fluids, Graphics processing units, High temperature, Modeling, Porosity
Journal Articles

Turbulent Channel Flow With Spatially Dependent Viscosity: A Numerical Study

Victor Coppo Leite, Elia Merzari
Journal: Journal of Fluids Engineering
Article Type: Research-Article
J. Fluids Eng. January 2022, 144(1): 011303.
Paper No: FE-21-1074
DOI: https://doi.org/10.1115/1.4052416
Published Online: October 6, 2021
View Article titled, Turbulent Channel Flow With Spatially Dependent Viscosity: A Numerical Study
Click here to open pdf in another window PDF for Turbulent Channel Flow With Spatially Dependent Viscosity: A Numerical Study
Topics: Delays, Flow (Dynamics), Friction, Reynolds number, Turbulence, Viscosity, Channel flow
Proceedings Papers

A New RANS Correction to Account for Varying Viscosity Effects

Victor Coppo Leite, Elia Merzari
Proc. ASME. FEDSM2021, Volume 1: Aerospace Engineering Division Joint Track; Computational Fluid Dynamics, V001T02A025, August 10–12, 2021
Paper No: FEDSM2021-65823
DOI: https://doi.org/10.1115/FEDSM2021-65823
View Paper titled, A New RANS Correction to Account for Varying Viscosity Effects
Click here to open pdf in another window PDF for A New RANS Correction to Account for Varying Viscosity Effects
Topics: Reynolds-averaged Navier–Stokes equations, Viscosity, Turbulence, Computer simulation, Reynolds number, Channel flow, Combustion chambers, Delays, Design, Engineering systems and industry applications
Journal Articles

On the Impact of Aspect Ratio and Other Geometric Effects on the Stability of Rectangular Thermosiphons

Tri Nguyen, Elia Merzari
Journal: Journal of Heat Transfer
Article Type: Research-Article
J. Heat Transfer. July 2021, 143(7): 072601.
Paper No: HT-20-1751
DOI: https://doi.org/10.1115/1.4051055
Published Online: May 28, 2021
View Article titled, On the Impact of Aspect Ratio and Other Geometric Effects on the Stability of Rectangular Thermosiphons
Click here to open pdf in another window PDF for On the Impact of Aspect Ratio and Other Geometric Effects on the Stability of Rectangular Thermosiphons
Topics: Flow (Dynamics), Oscillations, Stability, Simulation
Proceedings Papers

Computational Fluid Dynamics Simulation of a Single-Phase Rectangular Thermosiphon

Tri Nguyen, Elia Merzari
Proc. ASME. ICONE2020, Volume 3: Student Paper Competition; Thermal-Hydraulics; Verification and Validation, V003T12A052, August 4–5, 2020
Paper No: ICONE2020-16934
DOI: https://doi.org/10.1115/ICONE2020-16934
View Paper titled, Computational Fluid Dynamics Simulation of a Single-Phase Rectangular Thermosiphon
Click here to open pdf in another window PDF for Computational Fluid Dynamics Simulation of a Single-Phase Rectangular Thermosiphon
Topics: Computational fluid dynamics, Simulation
Proceedings Papers

Direct Numerical Simulation of Fluid Flow in a 5x5 Square Rod Bundle Using Nek5000

Adam Kraus, Elia Merzari, Thomas Norddine, Oana Marin, Sofiane Benhamadouche
Proc. ASME. ICONE2020, Volume 3: Student Paper Competition; Thermal-Hydraulics; Verification and Validation, V003T12A036, August 4–5, 2020
Paper No: ICONE2020-16643
DOI: https://doi.org/10.1115/ICONE2020-16643
View Paper titled, Direct Numerical Simulation of Fluid Flow in a 5x5 Square Rod Bundle Using Nek5000
Click here to open pdf in another window PDF for Direct Numerical Simulation of Fluid Flow in a 5x5 Square Rod Bundle Using Nek5000
Topics: Computer simulation, Fluid dynamics, Fuel rods, Kinetic energy, Turbulence
Proceedings Papers

The Effect of Varying Viscosity in Turbulent Channel Flow

Victor Coppo Leite, Elia Merzari
Proc. ASME. FEDSM2020, Volume 3: Computational Fluid Dynamics; Micro and Nano Fluid Dynamics, V003T05A019, July 13–15, 2020
Paper No: FEDSM2020-20228
DOI: https://doi.org/10.1115/FEDSM2020-20228
View Paper titled, The Effect of Varying Viscosity in Turbulent Channel Flow
Click here to open pdf in another window PDF for The Effect of Varying Viscosity in Turbulent Channel Flow
Topics: Channel flow, Turbulence, Viscosity, Reynolds number, Flow (Dynamics), Computational fluid dynamics, Computer simulation, Friction, Transients (Dynamics), Delays
Proceedings Papers

Modeling the Effect of Spacer Grid and Mixing Vanes in Coupled CFD Simulations of Small Modular Reactors

Jun Fang, Dillon Shaver, Elia Merzari
Proc. ASME. FEDSM2020, Volume 3: Computational Fluid Dynamics; Micro and Nano Fluid Dynamics, V003T05A028, July 13–15, 2020
Paper No: FEDSM2020-20370
DOI: https://doi.org/10.1115/FEDSM2020-20370
View Paper titled, Modeling the Effect of Spacer Grid and Mixing Vanes in Coupled CFD Simulations of Small Modular Reactors
Click here to open pdf in another window PDF for Modeling the Effect of Spacer Grid and Mixing Vanes in Coupled CFD Simulations of Small Modular Reactors
Topics: Computational fluid dynamics, Modeling, Momentum, Simulation, Small modular reactors
Journal Articles

Direct Numerical Simulation of the Flow Through a Randomly Packed Pebble Bed

Mustafa Alper Yildiz, Gerrit Botha, Haomin Yuan, Elia Merzari, Richard C. Kurwitz, Yassin A. Hassan
Journal: Journal of Fluids Engineering
Article Type: Research-Article
J. Fluids Eng. April 2020, 142(4): 041405.
Paper No: FE-19-1553
DOI: https://doi.org/10.1115/1.4045439
Published Online: January 24, 2020
View Article titled, Direct Numerical Simulation of the Flow Through a Randomly Packed Pebble Bed
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Topics: Anisotropy, Flow (Dynamics), Porosity, Stress, Turbulence, Reynolds number, Computer simulation, Statistics, Pressure drop
Proceedings Papers

Validation and Development of DNS Database for Low Prandtl Numbers in Rod Bundle

Jonathan K. Lai, Elia Merzari, Yassin A. Hassan, Aleksandr Obabko
Proc. ASME. AJKFluids2019, Volume 2: Computational Fluid Dynamics, V002T02A057, July 28–August 1, 2019
Paper No: AJKFluids2019-5036
DOI: https://doi.org/10.1115/AJKFluids2019-5036
View Paper titled, Validation and Development of DNS Database for Low Prandtl Numbers in Rod Bundle
Click here to open pdf in another window PDF for Validation and Development of DNS Database for Low Prandtl Numbers in Rod Bundle
Topics: Databases, Fuel rods, Heat transfer, Flow (Dynamics), Liquid metals, Prandtl number, Thermal diffusivity, Channel flow, Computer simulation, Fluids
Journal Articles

Direct Numerical Simulation of the Flow in a Bare Rod Bundle at Different Prandtl Numbers

Jonathan K. Lai, Giacomo Busco, Elia Merzari, Yassin A. Hassan
Journal: Journal of Heat Transfer
Article Type: Research-Article
J. Heat Transfer. December 2019, 141(12): 121702.
Paper No: HT-19-1180
DOI: https://doi.org/10.1115/1.4044832
Published Online: October 8, 2019
View Article titled, Direct Numerical Simulation of the Flow in a Bare Rod Bundle at Different Prandtl Numbers
Click here to open pdf in another window PDF for Direct Numerical Simulation of the Flow in a Bare Rod Bundle at Different Prandtl Numbers
Topics: Flow (Dynamics), Fuel rods, Prandtl number, Temperature, Turbulence, Simulation, Fluctuations (Physics), Kinetic energy, Reynolds number, Heat transfer
Journal Articles

Calculation of Friction Factors and Nusselt Numbers for Twisted Elliptical Tube Heat Exchangers Using Nek5000

Dillon R. Shaver, Lane B. Carasik, Elia Merzari, Nate Salpeter, Edward Blandford
Journal: Journal of Fluids Engineering
Article Type: Research-Article
J. Fluids Eng. July 2019, 141(7): 071205.
Paper No: FE-18-1691
DOI: https://doi.org/10.1115/1.4042889
Published Online: April 4, 2019
View Article titled, Calculation of Friction Factors and Nusselt Numbers for Twisted Elliptical Tube Heat Exchangers Using Nek5000
Click here to open pdf in another window PDF for Calculation of Friction Factors and Nusselt Numbers for Twisted Elliptical Tube Heat Exchangers Using Nek5000
Topics: Flow (Dynamics), Friction, Heat exchangers, Simulation, Turbulence, Heat transfer, Computational fluid dynamics, Reynolds number
Proceedings Papers

Analysis of Pressure Field on Wire-Wrapped Pin Bundle Surface for Concerns of FSI

Landon Brockmeyer, Aleksandr Obabko, Elia Merzari, Yassin Hassan
Proc. ASME. FEDSM2018, Volume 1: Flow Manipulation and Active Control; Bio-Inspired Fluid Mechanics; Boundary Layer and High-Speed Flows; Fluids Engineering Education; Transport Phenomena in Energy Conversion and Mixing; Turbulent Flows; Vortex Dynamics; DNS/LES and Hybrid RANS/LES Methods; Fluid Structure Interaction; Fluid Dynamics of Wind Energy; Bubble, Droplet, and Aerosol Dynamics, V001T08A008, July 15–20, 2018
Paper No: FEDSM2018-83521
DOI: https://doi.org/10.1115/FEDSM2018-83521
View Paper titled, Analysis of Pressure Field on Wire-Wrapped Pin Bundle Surface for Concerns of FSI
Click here to open pdf in another window PDF for Analysis of Pressure Field on Wire-Wrapped Pin Bundle Surface for Concerns of FSI
Topics: Fluid structure interaction, Pressure, Wire, Pins (Engineering), Fuels, Flow (Dynamics), Deflection, Fluctuations (Physics), Vibration, Deformation
Proceedings Papers

Calculation of Friction Factors and Nusselt Numbers for Twisted Elliptical Tube Heat Exchangers Using Nek5000

Dillon R. Shaver, Lane B. Carasik, Elia Merzari, Nate Salpeter, Edward Blandford
Proc. ASME. FEDSM2018, Volume 2: Development and Applications in Computational Fluid Dynamics; Industrial and Environmental Applications of Fluid Mechanics; Fluid Measurement and Instrumentation; Cavitation and Phase Change, V002T09A030, July 15–20, 2018
Paper No: FEDSM2018-83477
DOI: https://doi.org/10.1115/FEDSM2018-83477
View Paper titled, Calculation of Friction Factors and Nusselt Numbers for Twisted Elliptical Tube Heat Exchangers Using Nek5000
Click here to open pdf in another window PDF for Calculation of Friction Factors and Nusselt Numbers for Twisted Elliptical Tube Heat Exchangers Using Nek5000
Topics: Friction, Heat exchangers, Engineering simulation, Simulation, Computational fluid dynamics, Heat transfer, Laminar flow, Reynolds number, Turbulence, Design
Proceedings Papers

Performance Analysis of Nek5000 for Single-Assembly Calculations

Elia Merzari, Ronald Rahaman, Misun Min, Paul Fischer
Proc. ASME. FEDSM2018, Volume 2: Development and Applications in Computational Fluid Dynamics; Industrial and Environmental Applications of Fluid Mechanics; Fluid Measurement and Instrumentation; Cavitation and Phase Change, V002T09A031, July 15–20, 2018
Paper No: FEDSM2018-83517
DOI: https://doi.org/10.1115/FEDSM2018-83517
View Paper titled, Performance Analysis of Nek5000 for Single-Assembly Calculations
Click here to open pdf in another window PDF for Performance Analysis of Nek5000 for Single-Assembly Calculations
Topics: Manufacturing, Computational fluid dynamics, Engineering simulation, Simulation, Degrees of freedom, Dimensions, Fluids, Large eddy simulation, Physics, Pressurized water reactors
Proceedings Papers

Large Eddy Simulations of a Coolant Flow in Spacer Grid Fuel Assemblies With a Spectral Element Solver

Haomin Yuan, Vakhtang Makarashvili, Elia Merzari, Aleksandr Obabko, Yiqi Yu
Proc. ASME. ICONE26, Volume 8: Computational Fluid Dynamics (CFD); Nuclear Education and Public Acceptance, V008T09A029, July 22–26, 2018
Paper No: ICONE26-81892
DOI: https://doi.org/10.1115/ICONE26-81892
View Paper titled, Large Eddy Simulations of a Coolant Flow in Spacer Grid Fuel Assemblies With a Spectral Element Solver
Click here to open pdf in another window PDF for Large Eddy Simulations of a Coolant Flow in Spacer Grid Fuel Assemblies With a Spectral Element Solver
Topics: Coolants, Flow (Dynamics), Fuels, Large eddy simulation, Manufacturing, Computational fluid dynamics, Fuel rods, Engineering simulation, Geometry, Simulation
Proceedings Papers

Coupled Calculation on Fluid Structure Interaction in Plate-Type Fuel Element

Yiqi Yu, Elia Merzari, Jerome Solberg
Proc. ASME. ICONE26, Volume 8: Computational Fluid Dynamics (CFD); Nuclear Education and Public Acceptance, V008T09A046, July 22–26, 2018
Paper No: ICONE26-82418
DOI: https://doi.org/10.1115/ICONE26-82418
View Paper titled, Coupled Calculation on Fluid Structure Interaction in Plate-Type Fuel Element
Click here to open pdf in another window PDF for Coupled Calculation on Fluid Structure Interaction in Plate-Type Fuel Element
Topics: Fluid structure interaction, Fuels, Plates (structures), Deflection, Flow (Dynamics), Modeling, Physics, Simulation, Uranium, Aluminum plate