The flow and heat transfer characteristics for a heated, isothermal sphere under forced convection are studied numerically. Incompressible and compressible flows are considered separately. A modified body-fitted grid generation technique is applied to handle the irregular boundaries. In incompressible case, the computed results, such as pressure distribution, flow separation angle, drag coefficient and Mean Nusselt number, agree very well with ones obtained by the other numerical methods and/or experimental measurements. The most significant result is that the onset of flow separation in the present model occurs at Re = 10, smaller than that found by the other numerical studies, which is confirmed by a corresponding experiment. In compressible case, Re is governed by sphere surface temperature. The variation of flow and heat transfer features from increased surface temperature are found similar to that from decreasing the incoming flow velocity in the former case.
|Number of pages||7|
|Journal||Journal of the Chinese Society of Mechanical Engineers, Transactions of the Chinese Institute of Engineers, Series C/Chung-Kuo Chi Hsueh Kung Ch'eng Hsuebo Pao|
|State||Published - 1 Apr 1993|