Abstract
The thermal and force interaction between bodies and a flow of rarefied gas can be represented to a considerable extent by the momentum and energy exchange coefficients or by the equivalent accommodation coefficients. The accommodation coefficients are used when determining convective thermal fluxes and the aerodynamic characteristics of bodies under free molecular flow conditions, and are an important component of the theoretical relations irrespective of the model assumed for the interaction between the gas atoms and the surface of the solid.
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