

MODELING OF JOINT FLOW OF LIQUID FILM AND TURBULENT GAS AT WEIGHTLESSNESS
Tsvelodub O.Yu.^{1,2}, Arkhipov D.G.^{1}
^{1} Novosibirsk State University, Novosibirsk, Russia ^{2} Institute of Thermophysics SB RAS, Novosibirsk, Russia
Citation:
Tsvelodub, O.Yu. and Arkhipov, D.G., (2013) Modeling of joint flow of liquid film and turbulent gas at weightlessness, Modern Science: Researches, Ideas, Results, Technologies, Iss. #1(12), PP. 353  358.

Keywords: liquid films; turbulent gas flow; model equations; microgravity; nonlinear waves 
Abstracts:
The flow of a liquid film entrained by a turbulent gas flow is considered. The influence of gravity is neglected. Fluid velocity is significantly lower than the characteristic velocity of the gas, so for gas part of the problem we assume that interface is rigid and fixed. Due to the small film thickness, the perturbations of gas velocity caused by the roughness of the interface are considered as infinitely small. In this case the normal and shear stresses on the interface can be calculated separately for each spatial harmonics. Further modeling of nonlinear wave dynamics on a liquid film is computed under a certain stress field at the interface. At moderate Reynolds numbers in the approximation of long wavelength of the perturbations the model system of equations was used from which in the case of low Reynolds numbers a single evolution equation for the film thickness deviation from the unperturbed level was obtained. The aim of this work is to study this model equation. 
References:
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