• free convection stagnation-point boundary-layer flow in a porous medium with a density maximum

    نویسندگان :
    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1390/01/01
    • تاریخ انتشار در تی پی بین: 1390/01/01
    • تعداد بازدید: 688
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     the steady free convection boundary-layer flow near a stagnation point in a fluid-saturated porous medium is considered when the convecting fluid is close to its maximum density. three forms for the wall boundary condition are treated, a prescribed wall temperature, prescribed wall heat flux and newtonian heating. in each case the flow and heat transfer characteristics are determined by a dimensionless parameter δ   that measures the difference between the ambient temperature and the temperature at which the fluid attains its density maximum. we find that solutions are possible for δ≥0 for each case. for δ<0 there is a critical value δc of δ  , the value of which depends on the boundary conditions applied, with solutions possible only for δ≥δc. the nature of this critical value, as well as other limiting asymptotic forms is discussed.

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