Near-wall modeling of turbulent heat fluxes

The near-wall asymptotic behavior of the turbulent heat fluxes is analyzed and the result is used to formulate a second-moment turbulence closure for heat flux transport near a wall. The analysis shows that the pressure diffusion and viscous dissipation terms are of primary importance in the near-wall region and have to be properly modeled in the transport equations. New models satisfying the near-wall balance between viscous diffusion, viscous dissipation and pressure diffusion, and also having the characteristics of approaching their respective conventional high-Reynolds-number models far away from the wall are proposed.