{"title":"Double Diffusive Convection in a Partially Porous Cavity under Suction\/Injection Effects","authors":"Y. Outaleb, K. Bouhadef, O. Rahli","country":null,"institution":"","volume":55,"journal":"International Journal of Mechanical and Mechatronics Engineering","pagesStart":1477,"pagesEnd":1482,"ISSN":"1307-6892","URL":"https:\/\/publications.waset.org\/pdf\/5456","abstract":"Double-diffusive steady convection in a partially\r\nporous cavity with partially permeable walls and under the combined\r\nbuoyancy effects of thermal and mass diffusion was analysed\r\nnumerically using finite volume method.\r\nThe top wall is well insulated and impermeable while the bottom\r\nsurface is partially well insulated and impermeable and partially\r\nsubmitted to constant temperature T1 and concentration C1. Constant\r\nequal temperature T2 and concentration C2 are imposed along the\r\nvertical surfaces of the enclosure. Mass suction\/injection and\r\ninjection\/suction are respectively considered at the bottom of the\r\nporous centred partition and at one of the vertical walls.\r\nHeat and mass transfer characteristics as streamlines and average\r\nNusselt numbers and Sherwood numbers were discussed for different\r\nvalues of buoyancy ratio, Rayleigh number, and injection\/suction\r\ncoefficient.\r\nIt is especially noted that increasing the injection factor\r\ndisadvantages the exchanges in the case of the injection while the\r\ntransfer is augmented in case of suction. On the other hand, a critical\r\nvalue of the buoyancy ratio was highlighted for which heat and mass\r\ntransfers are minimized.","references":null,"publisher":"World Academy of Science, Engineering and Technology","index":"Open Science Index 55, 2011"}