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ISSN Online: 2377-424X

International Heat Transfer Conference 5
September, 3-7, 1974, Tokyo, Japan

FREE CONVECTION EFFECTS ON GRAETZ PROBLEM FOR LARGE PRANDTL NUMBER FLUIDS IN HORIZONTAL TUBES WITH UNIFORM WALL HEAT FLUX

Get access (open in a dialog) DOI: 10.1615/IHTC5.3120
pages 159-163

Аннотация

Combined free and forced laminar convection in the thermal entrance region of horizontal tubes with uniform wall heat flux is approached by a numerical method for large Prandtl number fluids. The analysis is based on the observation that as Pr → ∞ the primary flow becomes independent of the secondary flow but the convective terms due to secondary flow are important in the energy equation. The numerical results are compared against the available experimental data with generally good agreement. The theoretical results together with the available experimental results contribute to the basic understanding of a combined convection phenomenon.