000			01806aab a2200193 4500
008			240319b19911991|||mr||| |||| 00| 0 eng d
022			_a0017-9310
100			_aF.C. Lai _9881276
100			_aF.A. Kulacki _9881277
245			_aExperimental study of free and mixed convection in horizontal porous layers locally heated from below
300			_a525-541 p.
520			_aExperimental results are reported for free and mixed convection in liquid saturated, horizontal porous layers with localized heating from below. Three different sizes of heat source have been considered which give a relative heater size (axial length/layer depth) of 1.0–5.0. For natural convection, Nusselt numbers have been obtained for Rayleigh numbers of practical interest, 1 ⩽ Rah ⩽ 1000, while for mixed convection, results cover 1 ⩽ Rah ⩽ 1000 and 0.1 ⩽ Peh ⩽ 120. Based on dimensional analysis and nonlinear regression, correlations for Nusselt number against Rayleigh and Peclet numbers have been obtained. Experimental Nusselt numbers compare very well with numerically calculated values. Improved agreement between calculations and measurements can be obtained through use of an effective thermal conductivity. The stability of the flow and temperature fields are also carefully examined. The existence of a Peclet number for which the overall heat transfer rate is a minimum is confirmed by experiment.
650			_aFree and Mixed Convection _9881278
650			_aHorizontal Porous Layers _9881279
650			_aHeated _9783248
773	0		_dNew York, U.S.A : Pergamon Subsidiary of Elsevier Science & Technology _tInternational Journal of Heat and Mass Transfer _x00179310
856			_uhttps://www.sciencedirect.com/science/article/pii/001793109190271F
942			_2ddc _n0 _cART _o14993 _pMr. Muhammad Rafique Al Haj Rajab Ali (Late)
999			_c815047 _d815047