Steady one-dimensional flows of a polyatomic gas in the presence of an adsorbing-desorbing surface kept at constant and uniform temperature are studied by numerical solutions of the Boltzmann equation using the DSMC method. Borgnakke and Larsen model is used to describe inelastic collisions dynamics for a gas with rotational degrees of freedom. The adsorption and desorption phenomena are simulated by the flux balance model, leading to an additional equation for the time evolution of the surface coverage to be solved along with the gas dynamics. Numerical simulations are performed, varying the relevant physical parameters, and the results are discussed.

Kinetic theory description of gas adsorption-desorption on a solid surface

Frezzotti, Aldo
2019-01-01

Abstract

Steady one-dimensional flows of a polyatomic gas in the presence of an adsorbing-desorbing surface kept at constant and uniform temperature are studied by numerical solutions of the Boltzmann equation using the DSMC method. Borgnakke and Larsen model is used to describe inelastic collisions dynamics for a gas with rotational degrees of freedom. The adsorption and desorption phenomena are simulated by the flux balance model, leading to an additional equation for the time evolution of the surface coverage to be solved along with the gas dynamics. Numerical simulations are performed, varying the relevant physical parameters, and the results are discussed.
2019
Proceedings of the 31st International Symposium on Rarefied Gas Dynamics
978-0-7354-1874-5
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11311/1102749
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