Laminar natural convection heat transfer from isothermal spheres
作者： H. Jia , G. Gogos
DOI: 10.1016/0017-9310(95)00259-6
关键词: Vortex 、 Flow separation 、 Drag coefficient 、 Materials science 、 Nusselt number 、 Natural convection 、 Mechanics 、 Laminar flow 、 Grashof number 、 Thermodynamics 、 Heat transfer
摘要: Abstract Steady-state natural convection over a sphere has been studied numerically. Heat transfer and drag coefficients for wide range of Grashof numbers (101 ⩽ Gr 108) Prandlt 0.72 7.0 have obtained. A plume with mushroom-shaped front forms above the whose length thickness decrease increasing Gr. At high (Gr ⩾ 107 Pr = 0.72), flow separation an associated recirculation vortex exist in wake sphere. The size increases local Nusselt number along surface first decreases, reaches minimum, then steeply at rear
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sci-hub.se 参考文章(31)
H. J. Merk, J. A. Prins, Thermal convection in laminary boundary layers. I Flow Turbulence and Combustion. ,vol. 4, pp. 11- 24 ,(1953) , 10.1007/BF03184660
John R. Grace, R. Clift, Martin E. Weber, Bubbles, Drops, and Particles ,(1978)
H. J. Merk, J. A. Prins, Thermal convection in laminar boundary layers III Flow Turbulence and Combustion. ,vol. 4, pp. 195- 206 ,(1954) , 10.1007/BF03184952
G.D. Raithby, K.G.T. Hollands, A General Method of Obtaining Approximate Solutions to Laminar and Turbulent Free Convection Problems Advances in heat transfer. ,vol. 11, pp. 265- 315 ,(1975) , 10.1016/S0065-2717(08)70076-5
F. Geoola, A.R.H. Cornish, Numerical simulation of free convective heat transfer from a sphere International Journal of Heat and Mass Transfer. ,vol. 25, pp. 1677- 1687 ,(1982) , 10.1016/0017-9310(82)90147-8
Tetsu Fujii, Tomohiro Honda, Motoo Fujii, A NUMERICAL ANALYSIS OF LAMINAR FREE CONVECTION AROUND AN ISOTHERMAL SPHERE: FINITE-DIFFERENCE SOLUTION OF THE FULL NAVIER-STOKES AND ENERGY EQUATIONS BETWEEN CONCENTRIC SPHERES Numerical Heat Transfer Part A-applications. ,vol. 7, pp. 103- 111 ,(1984) , 10.1080/01495728408961814
T. Chiang, A. Ossin, C. L. Tien, Laminar Free Convection From a Sphere Journal of Heat Transfer. ,vol. 86, pp. 537- 541 ,(1964) , 10.1115/1.3688739
C.M. Vest, M.L. Lawson, Onset of convection near a suddenly heated horizontal wire International Journal of Heat and Mass Transfer. ,vol. 15, pp. 1281- 1283 ,(1972) , 10.1016/0017-9310(72)90192-5
F. Geoola, A.R.H. Cornish, Numerical solution of steady-state free convective heat transfer from a solid sphere International Journal of Heat and Mass Transfer. ,vol. 24, pp. 1369- 1379 ,(1981) , 10.1016/0017-9310(81)90187-3
Francis E. Fendell, Laminar natural convection about an isothermally heated sphere at small Grashof number Journal of Fluid Mechanics. ,vol. 34, pp. 163- 176 ,(1968) , 10.1017/S0022112068001825