An elliptic blending differential flux model for natural, mixed and forced convection

- Several modifications are introduced to the Differential Flux Model pro-posed by Shin et al. (2008).
- The influence of wall blockage on the turbulent heat flux is accounted for by elliptic blending.
- These modifications are introduced in order to reproduce, in association with the most recent version of the EB-RSM, the full range of regimes, from forced to natural convection.
- The interest of the new model is demonstrated using analytical arguments, a priori tests and computations.
- Validation is performed in channel flows in the different convection regimes, as well as in a differentially heated cavity.

Several modifications are introduced to the Elliptic Blending Differential Flux Model proposed by Shin et al. (2008) to account for the influence of wall blockage on the turbulent heat flux. These modifications are introduced in order to reproduce, in association with the most recent version of the EB-RSM, the full range of regimes, from forced to natural convection, without any case-specific modification. The interest of the new model is demonstrated using analytical arguments, a priori tests and computations in channel flows in the different convection regimes, as well as in a differentially heated cavity.