Sensitivity of energy accommodation modelling of rarefied flow over reentry vehicle geometries using DSMC (Direct Simulation Monte-Carlo)
This paper compares the sensitivity of energy accommodation in the modelling of the gas/wall interaction for rarefied flow over a typical reentry vehicle geometry using the Direct Simulation Monte-Carlo (DSMC) algorithm. The reflected molecule's energy accommodation was varied while a uniform angular distribution was assumed. The freestream conditions were Minfinity = 27.5 and altitudes of 76.2 and 91.4 km. The ratio of the freestream stagnation temperature to the wall temperature was approximately 100. Surface pressure, shear stress, and heat transfer distributions as well as drag coefficients are presented for varying degrees of accommodation. These will be compared to the results from classical specular and diffuse models.
- Research Organization:
- Sandia National Labs., Albuquerque, NM (USA)
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 6832708
- Report Number(s):
- SAND-88-0572C; CONF-880781-2; ON: DE88014522
- Country of Publication:
- United States
- Language:
- English
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