Direct numerical simulation of passive scalar field in a turbulent channel flow
Journal Article
·
· Journal of Heat Transfer (Transactions of the ASME (American Society of Mechanical Engineers), Series C); (United States)
- Univ. of Tokyo (Japan)
A direct numerical simulation (DNS) of the fully developed thermal field in a dimensional turbulent channel flow of air was carried out. The isoflux condition was imposed on the two walls so that the local mean temperature increased linearly in the streamwise direction. With any buoyancy effect neglected, temperature was considered as a passive scalar. The computation was executed on 1,589,248 grid points by using a spectral method. The statistics obtained were root-mean-square temperature fluctuations, turbulent heat fluxes, turbulent Prandtl number, and dissipation time scales. They agreed fairly well with existing experimental and numerical simulation data. Each term in the budget equations of temperature variance, its dissipation rate, and turbulent heat fluxes was also calculated. It was found that the temperature fluctuation [theta][prime] was closely correlated with the streamwise velocity fluctuation u[prime], particularly in the near-wall region. Hence, the distribution of budget terms for the streamwise and wall-normal heat fluxes, [bar u][prime][theta] and [bar v][prime][theta][prime], were very similar to those for the two Reynolds stress components, [bar u][prime]u[prime]and [bar u][prime]v[prime].
- OSTI ID:
- 7179509
- Journal Information:
- Journal of Heat Transfer (Transactions of the ASME (American Society of Mechanical Engineers), Series C); (United States), Journal Name: Journal of Heat Transfer (Transactions of the ASME (American Society of Mechanical Engineers), Series C); (United States) Vol. 114:3; ISSN 0022-1481; ISSN JHTRAO
- Country of Publication:
- United States
- Language:
- English
Similar Records
Numerical investigation of near-wall turbulent heat transfer taking into account the unsteady heat conduction in the solid wall
Direct numerical simulation of turbulent heat transfer in an axially rotating pipe flow
Analysis of turbulent transport and mixing in transitional Rayleigh–Taylor unstable flow using direct numerical simulation data
Journal Article
·
Mon May 01 00:00:00 EDT 1989
· Journal of Heat Transfer (Transactions of the ASME (American Society of Mechanical Engineers), Series C); (United States)
·
OSTI ID:6019145
Direct numerical simulation of turbulent heat transfer in an axially rotating pipe flow
Conference
·
Thu Jul 01 00:00:00 EDT 1999
·
OSTI ID:20026793
Analysis of turbulent transport and mixing in transitional Rayleigh–Taylor unstable flow using direct numerical simulation data
Journal Article
·
Mon Oct 18 00:00:00 EDT 2010
· Physics of Fluids
·
OSTI ID:1124837