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Gas-Kinetic Computational Algorithms for Hypersonic Flows in Continuum and…

Award Information

Agency:
National Aeronautics and Space Administration
Branch:
N/A
Award ID:
88108
Program Year/Program:
2008 / SBIR
Agency Tracking Number:
074789
Solicitation Year:
N/A
Solicitation Topic Code:
N/A
Solicitation Number:
N/A
Small Business Information
D & P LLC
3409 N. 42nd Pl. Phoenix, AZ -
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Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
 
Phase 1
Fiscal Year: 2008
Title: Gas-Kinetic Computational Algorithms for Hypersonic Flows in Continuum and Transitional Regimes
Agency: NASA
Contract: NNX08CC63P
Award Amount: $99,992.00
 

Abstract:

This SBIR Phase I project explores two gas-kinetic computational algorithms for simulation of hypersonic flows in both continuum and transitional regimes. One is the gas-kinetic BGK-Burnett solver and the other is the gas-kinetic BGK solver with the regulated particle collision time. Different from the macroscopic Burnett approach, the proposed gas-kinetic BGK-Burnett solver is unconditionally stable for all Knudsen numbers. Whereas it is almost impossible to correctly set up boundary condition for the Burnett equations, this can be easily done in the proposed BGK-Burnett solver with the Maxwell boundary condition, re-emitting the particles from the boundary according to the accommodation coefficient. More importantly, this BGK-Burnett solver not only allows a single algorithm for both continuum and transitional flow regimes but also is more suitable for integration with either DSMC or direct Boltzmann solver in the rarefied flow regime. The gas-kinetic BGK solver with the regulated particle collision time can further reduce the computational costs over the BGK-Burnett solver. The focus of Phase I work is to determine the validity Knudsen number range of these two algorithms.

Principal Investigator:

Lei Tang
Principal Investigator
4805180981
tanglei@d-p-llc.com

Business Contact:

Lei Tang
President
4805180981
tanglei@d-p-llc.com
Small Business Information at Submission:

D&P, LLC
3409 N. 42nd Place Phoenix, AZ 85018

EIN/Tax ID: 743185214
DUNS: N/A
Number of Employees:
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No