Large eddy simulation of mixed convection in a vertical turbulent annular pipe flow

Joon Sang Lee, Xiaofeng Xu, R. H. Pletcher

Research output: Contribution to journalConference article

Abstract

The goal of the present study is to perform a large eddy simulation of vertical turbulent annular pipe flow under conditions in which fluid properties vary significantly, and to investigate the effects of buoyancy on the turbulent structures and transport. Isoflux wall boundary conditions with low and high heating are imposed. The compressible filtered Navier-Stokes equations are solved using a second order accurate finite volume method. Low Mach number preconditioning is used to enable the compressible code to work efficiently at low Mach numbers. A dynamic subgrid-scale stress model accounts for the subgrid-scale turbulence. Comparisons were made with available experimental data. The results showed that the strong heating and buoyant force caused distortions of the flow structure resulting in reduction of turbulent intensities, shear stress, and turbulent heat flux, particularly near the wall.

Original languageEnglish
Pages (from-to)81-94
Number of pages14
JournalAmerican Society of Mechanical Engineers, Heat Transfer Division, (Publication) HTD
Volume372
Issue number6
DOIs
Publication statusPublished - 2002 Dec 1
Event2002 ASME International Mechanical Engineering Congress and Exposition - New Orleans, LA, United States
Duration: 2002 Nov 172002 Nov 22

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Mixed convection
Pipe flow
Large eddy simulation
Mach number
Heating
Finite volume method
Flow structure
Buoyancy
Navier Stokes equations
Heat flux
Shear stress
Turbulence
Boundary conditions
Fluids

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering
  • Fluid Flow and Transfer Processes

Cite this

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abstract = "The goal of the present study is to perform a large eddy simulation of vertical turbulent annular pipe flow under conditions in which fluid properties vary significantly, and to investigate the effects of buoyancy on the turbulent structures and transport. Isoflux wall boundary conditions with low and high heating are imposed. The compressible filtered Navier-Stokes equations are solved using a second order accurate finite volume method. Low Mach number preconditioning is used to enable the compressible code to work efficiently at low Mach numbers. A dynamic subgrid-scale stress model accounts for the subgrid-scale turbulence. Comparisons were made with available experimental data. The results showed that the strong heating and buoyant force caused distortions of the flow structure resulting in reduction of turbulent intensities, shear stress, and turbulent heat flux, particularly near the wall.",
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Large eddy simulation of mixed convection in a vertical turbulent annular pipe flow. / Lee, Joon Sang; Xu, Xiaofeng; Pletcher, R. H.

In: American Society of Mechanical Engineers, Heat Transfer Division, (Publication) HTD, Vol. 372, No. 6, 01.12.2002, p. 81-94.

Research output: Contribution to journalConference article

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N2 - The goal of the present study is to perform a large eddy simulation of vertical turbulent annular pipe flow under conditions in which fluid properties vary significantly, and to investigate the effects of buoyancy on the turbulent structures and transport. Isoflux wall boundary conditions with low and high heating are imposed. The compressible filtered Navier-Stokes equations are solved using a second order accurate finite volume method. Low Mach number preconditioning is used to enable the compressible code to work efficiently at low Mach numbers. A dynamic subgrid-scale stress model accounts for the subgrid-scale turbulence. Comparisons were made with available experimental data. The results showed that the strong heating and buoyant force caused distortions of the flow structure resulting in reduction of turbulent intensities, shear stress, and turbulent heat flux, particularly near the wall.

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