A Monte Carlo model for seeded atomic flows in the transition regime

Journal Article · Mon Jun 01 04:00:00 EDT 2009 · Journal of Computational Physics

DOI:https://doi.org/10.1016/j.jcp.2009.02.016· OSTI ID:21308089

Longo, S ^[1]; Diomede, P ^[1]

---

1. Dipartimento di Chimica dell'Universita di Bari, Via Orabona 4, 70126 Bari (Italy)

A simple model for the numerical determination of separation effects in seeded atomic gas flows is presented. The model is based on the known possibility to provide a statistically convergent estimate of the exact solution for a linear transport equation using the test particle Monte Carlo method. Accordingly, the flow field of the main gas is preliminary calculated and as a second step the linear transport equations obtained by fixing the target distribution in the collision term of the Boltzmann equation for both main and minority components are solved. Both solutions are based on appropriately devised test particle Monte Carlo methods. The second step, the critical one in evaluating the separation effects, is exact and thereby completely free of numerical diffusion. The model is described in details and illustrated by 2D test cases of atomic separation in shock fronts.

• OSTI ID: 21308089
• Journal Information: Journal of Computational Physics, Journal Name: Journal of Computational Physics Journal Issue: 10 Vol. 228; ISSN JCTPAH; ISSN 0021-9991
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BOLTZMANN EQUATION
COLLISIONS
COMPRESSIBLE FLOW
COMPUTERIZED SIMULATION
DIFFUSION
EXACT SOLUTIONS
GAS FLOW
MONTE CARLO METHOD
TEST PARTICLES
TRANSPORT THEORY