Accession Number:

AD1051372

Title:

Demonstration of Hybrid DSMC-CFD Capability for Nonequilibrium Reacting Flow

Descriptive Note:

Technical Report

Corporate Author:

University of Minnesota Minneapolis United States

Personal Author(s):

Report Date:

2018-02-09

Pagination or Media Count:

28.0

Abstract:

New direct simulation Monte-Carlo DSMC and computational fluid dynamic CFD models were developed for integration into MGDS and US3D simulation codes. The models are based on new ab-intio rate data obtained using state-of-the-art potential energy surfaces for air species. A probability model cross-section model is developed for use in DSMC, and the model analytically integrates to a closed-form model for use in CFD. The model includes the coupling between nonequilibrium non-Boltzmann internal energy distributions and dissociation. CFD simulations of the Hollow Cylinder Flare geometry were performed, which involves high-enthalpy flow over a sharp leading edge. Conditions matched recent experiments performed in the CUBRC Lens-XX facility. This flow was chosen since a recent blind-code validation exercise revealed differences in CFD predictions and experimental data that could be due to rarefied flow effects. The CFD solutions using the US3D code were run with no-slip boundary conditions and with slip boundary conditions.

Subject Categories:

  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE