A Modular Particle-continuum Numerical Algorithm for Hypersonic Non-equilibrium Flows
نویسنده
چکیده
A MODULAR PARTICLE-CONTINUUM NUMERICAL ALGORITHM FORHYPERSONIC NON-EQUILIBRIUM FLOWS byThomas Edward Schwartzentruber Chairperson: Iain D. Boyd Hypersonic vehicles traveling at high altitudes experience conditions ranging fromrarefied to continuum flow. Even within a mostly continuum flow, there may belocal regions of rarefied (or non-equilibrium) flow generated by sharp leading edges,by rapid expansion in the wake of a vehicle, as well as by strong gradients in shockwaves and boundary layers. Although a particle method is necessary for accuratesimulation of non-equilibrium regions, particle simulation of the entire flowfield iscomputationally expensive.A modular particle-continuum (MPC) numerical algorithm for steady-state hy-personic flows is presented that solves the Navier-Stokes equations in regions ofnear-equilibrium and uses the direct simulation Monte Carlo (DSMC) method tosimulate regions of non-equilibrium gas flow. Existing state-of-the-art DSMC andNavier-Stokes codes are loosely-coupled using state-based information transfer and
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