Simulation of kinetic equations for physicochemical processes
Abstract
Calculations of the flows of neutral gas mixtures are reviewed with attention given to the numerical simulation of realistic rarefied gas flows. Kinetic Boltzmann equations for flows of neutral/reacting gas mixtures with internal degrees of freedom are emphasized in the analysis, and the Euler method is used to solve the set of equations. The collision integrals can be calculated in each node by the Monte Carlo technique yielding the temperature variation of the components with time as well as the concentrations and distribution functions. Direct statistical simulation (DSS) is shown to solve the gas dynamics with particular insights as to the physicochemical processes of the mixtures. Extensions of the DSS technique are also considered which account for the effects of the dissociation-recombination reactions. The review examines some of the effects of the internal degrees of freedom of molecules and chemical reactions on the aerodynamics of aircraft in the upper atmosphere.
- Publication:
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Russian Journal of Theoretical and Applied Mechanics
- Pub Date:
- March 1992
- Bibcode:
- 1992RJTAM...2....1I
- Keywords:
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- Gas Flow;
- Gas Mixtures;
- Kinetic Equations;
- Neutral Gases;
- Rarefied Gas Dynamics;
- Boltzmann Transport Equation;
- Chemical Reactions;
- Degrees Of Freedom;
- Flow Characteristics;
- Heat Transfer Coefficients;
- Interactional Aerodynamics;
- Monte Carlo Method;
- Thermodynamics and Statistical Physics