Publicou 6 edições por ano
ISSN Imprimir: 1940-2503
ISSN On-line: 1940-2554
Indexed in
STUDY OF EFFECT OF MOLECULAR PRANDTL NUMBER, TRANSPIRATION AND LONGITUDINAL PRESSURE GRADIENT ON FLOW AND HEAT TRANSFER CHARACTERISTICS IN BOUNDARY LAYERS
RESUMO
A numerical modeling of a subsonic flow at a permeable plate in the presence of a flow pressure gradient is carried out using a differential turbulence model, supplemented with the transport equation for the turbulent heat flux. The dependences of the turbulent Prandtl number and other turbulent flow and heat transfer characteristics from the molecular Prandtl number, injection (suction) intensity of the gas through the permeable wall, and the acceleration parameter of the flow are presented. Air and mixtures of helium with xenon and argon are selected as the gas heat carriers and mercury, water, and transformer oil are selected as the liquid heat carriers, respectively. The effect of the variability of the turbulent Prandtl number on heat transfer characteristics, in particular, on the Nusselt number, is studied. It is shown that the difference of the Nusselt number obtained in the condition of the constant turbulent Prandtl number from the results obtained in the calculations with the equation for the turbulent heat flux increases under low and high molecular Prandtl number. The injection, suction, and pressure gradient also increase this difference and also lead to a substantial violation of the Reynolds analogy.
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Lushchik V. G., Makarova M. S., Numerical Simulation of the Turbulent Boundary Layer with an Adverse Pressure Gradient, Fluid Dynamics, 57, 3, 2022. Crossref
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Lushchik V. G., Makarova M. S., Heat Transfer During the Tube Flow of an He–Xe Gas Mixture with a Substantial Pressure Gradient Due to the Strong Heating of the Tube, Journal of Engineering Physics and Thermophysics, 95, 6, 2022. Crossref