Une alternative aux hypothèses de Boussinesq des gaz chauds : L'approximation polytropiqueAn alternative to Boussinesq hypothesis for hot gases,the polytropic approximation |
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Authors: | Claude Rey Saı̈d Benjeddou |
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Affiliation: | Laboratoire de modélisation et simulation numérique en mécanique, L3M-FRE 2405 du CNRS, les Universités d''Aix-Marseille, IMT La Jetée, technopôle de Château-Gombert, 38, rue Frédéric Joliot Curie, 13451 Marseille cedex 20, France |
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Abstract: | A new approximation is proposed for the balance equations of heated gas flows, taking into account completely the couplings between dynamic and thermal fields, as well as compressibility, stating in a polytropic formulation the relation between the quantities of corresponding state. The polytropic exponent is the new variable that characterises the transfers; it substitutes the temperature for the pressure and the density that are physical quantities difficult to grasp. The method opens interesting prospects for the study of heated gases, for experiments, or for modelling and numerical simulation. To cite this article: C. Rey, S. Benjeddou, C. R. Mecanique 332 (2004). |
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Keywords: | Mécanique des fluides Gaz chauffés Turbulence Convection naturelle Convection mixte Compressibilité Fluids mechanics Heated gases Turbulence Free convection Mixed convection Compressibility |
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