Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
653996 | International Communications in Heat and Mass Transfer | 2009 | 6 Pages |
Abstract
In the present study, the non-Darcian effects are investigated for the jet impingement cooling of a heated surface immersed in a confined porous channel with Brinkman-Forchheimer-extended Darcy (BFD) model. The results are presented for mixed convection with wide ranges of governing parameters, which are: - Rayleigh number (Ra), Péclet number (Pe), Darcy number (Da), porosity (Ï) and inertial coefficient (CF). The results of mixed convection mode have been demonstrated and is found to cause minimum average Nusselt number (Nuâ) in the mixed convection regime. For low values of Pe, increasing Ra and decreasing Da lead to the increase in Nuâ. When Pe increases to a high value, the effect of Ra and the effect of Da for Darcy regime (Da â¤Â 10â 4) is negligible. The heat transfer rate for Da in the non-Darcy regime is higher than that of the Darcy regime when Pe is high. The effects of CF and Ï are only significant in the region of forced convection domination for the non-Darcy regime, in which the increase in CF or Ï reduces Nuâ.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Fluid Flow and Transfer Processes
Authors
Kok-Cheong Wong, Nawaf H. Saeid,