A new Cartesian implementation of the direct simulation Monte Carlo (DSMC) method, named the hypersonic aerothermodynamics particle (HAP) code, is presented. This code is intended for rapid setup and simulation of rarefied flow problems, and as a framework for evaluating new physical models and numerical techniques. Unique features include the use of nonuniform Cartesian adaptive subcells, a co...

We present and discuss a particle simulation method for solving the Boltzmann equation which incorporates the variance reduction ideas presented in L. L. Baker and N. G. Hadjiconstantinou Physics of Fluids 17, 051703 2005 . The variance reduction, achieved by simulating only the deviation from equilibrium, results in a significant computational efficiency advantage for low speed flows compared ...

Vincent Casseau 1,2,*,‡, Daniel E. R. Espinoza 1,2,‡, Thomas J. Scanlon 1,2,‡ and Richard E. Brown 2,‡ 1 James Weir Fluids Laboratory, University of Strathclyde, Glasgow G1 1XJ, UK; [email protected] (D.E.R.E.); [email protected] (T.J.S.) 2 Centre for Future Air-Space Transportation Technology, University of Strathclyde, Glasgow G1 1XJ, UK; [email protected] * Corresp...

This paper presents computational results obtained with the direct simulation Monte Carlo DSMC method for several biconic test cases in which shock interactions and ow separation reattachment are key features of the ow Recent ground based experiments have been performed for several biconic con gurations and surface heating rate and pressure measurements have been proposed for code validation st...

Thermal accommodation coefficient, one of the fundamental parameters in rarefied gas dynamics, is usually introduced to account for the fraction of incident molecules interacting with solid surface in a diffusive manner. In the present study, the effects of thermal accommodation on the unsteady one-dimensional micro-flow are examined, when the oscillating flow input is applied, by employing the...