An explicit WET-type model for the turbulent scalar fluxes

• A new explicit WET model for the turbulent heat fluxes is derived and developed from the transport equation of the scalar passive flux. In order to study the performance of the model itself, all other turbulent quantities are taken from a DNS channel flow data-base and thus the error source has been minimized. This anisotropic eddy diffusivity model can be solved with a two-equation model for the temperature field based on the temperature variance and its dissipation rate. The model can theoretically be used for a range of Prandtl numbers or a range of different fluids. The results are compared with the DNS channel flow and fairly good agreement is achieved

Ämnesord

TEKNIK OCH TEKNOLOGIER  -- Maskinteknik -- Energiteknik (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Mechanical Engineering -- Energy Engineering (hsv//eng)

Nyckelord

fluids

dissipation rate

temperature variance

anisotropic eddy diffusivity model

DNS channel flow

scalar passive flux

transport equation

turbulent heat fluxes

WET type model

turbulent scalar fluxes

Prandtl numbers

domain name system channel flow

Publikations- och innehållstyp

kon (ämneskategori)

ref (ämneskategori)