Hybrid Particle-Continuum Numerical Methods for Aerospace Applications
MICHIGAN UNIV ANN ARBOR DEPT OF AEROSPACE ENGINEERING
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Often, rarefied flows of interest in aerospace applications are embedded within largely continuum flow fields. Neither continuum nor kinetic methods provide both physically accurate and numerically efficient techniques to simulate the entire flow field. Instead, multi-scale methods can provide the capability of achieving the efficiency of continuum methods in regions where the degree of collisional nonequilibrium is small, while maintaining the physical accuracy of kinetic methods in rarefied portions of the flow. This work begins with an outline of typical aerospace flows that may require a multi-scale analysis in order to make accurate and efficient predictions. It then provides an overview of the research performed in developing hybrid methods for partially rarefied gas flows. Finally, some results derived from current state of the art hybrid codes are presented and emerging developments are described.
- Fluid Mechanics