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Creating A Simple Single Computational Approach To Modeling Rarefied And Continuum Flow About Aerospace Vehicles by David B. Goldstein

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1NASA Technical Reports Server (NTRS) 19970037583: Creating A Simple Single Computational Approach To Modeling Rarefied And Continuum Flow About Aerospace Vehicles

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We proposed to create a single computational code incorporating methods that can model both rarefied and continuum flow to enable the efficient simulation of flow about space craft and high altitude hypersonic aerospace vehicles. The code was to use a single grid structure that permits a smooth transition between the continuum and rarefied portions of the flow. Developing an appropriate computational boundary between the two regions represented a major challenge. The primary approach chosen involves coupling a four-speed Lattice Boltzmann model for the continuum flow with the DSMC method in the rarefied regime. We also explored the possibility of using a standard finite difference Navier Stokes solver for the continuum flow. With the resulting code we will ultimately investigate three-dimensional plume impingement effects, a subject of critical importance to NASA and related to the work of Drs. Forrest Lumpkin, Steve Fitzgerald and Jay Le Beau at Johnson Space Center. Below is a brief background on the project and a summary of the results as of the end of the grant.

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  • Title: ➤  NASA Technical Reports Server (NTRS) 19970037583: Creating A Simple Single Computational Approach To Modeling Rarefied And Continuum Flow About Aerospace Vehicles
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  • Language: English

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