CFD boundary conditions at ablative surface in gas flow with arbitrary condensation and accommodation coefficients

被引:2
作者
Pekker, Leonid [1 ]
机构
[1] ERC Inc, Edwards AFB, CA 93524 USA
关键词
CFD; Boundary conditions; Ablation; Vaporization; TEMPERATURE-JUMP PROBLEM; THERMAL CREEP; RAREFIED-GAS; KINETIC-THEORY; HYDRODYNAMIC EQUATION; VISCOUS-SLIP; MODEL; EVAPORATION; VAPORIZATION;
D O I
10.1016/j.ijheatmasstransfer.2009.08.004
中图分类号
O414.1 [热力学];
学科分类号
摘要
We develop an analytical Knudsen layer model at the ablative surface in gas flow: this model takes into account the temperature and velocity gradients in the bulk gas and the rebounding of gas molecules by the ablative wall back into the gas region. in addition, this model uses a bimodal velocity distribution function which preserves the laws of conservation of mass, momentum and energy within the Knudsen layer and converges to the Chapman-Enskog velocity distribution function at the outer boundary of the Knudsen layer. This model enables us to obtain the boundary conditions at the ablative surface in gas flow for arbitrary condensation and accommodation coefficients, which can be used for computational fluid dynamics simulation of ablation avoiding "micro" modelling of the evaporation process at the mean free path scale. (C) 2009 Elsevier Ltd. All rights reserved.
引用
收藏
页码:548 / 557
页数:10
相关论文
共 40 条
[1]   NUMERICAL EVALUATION OF THE SLIP COEFFICIENT [J].
ALBERTONI, S ;
CERCIGNANI, C ;
GOTUSSO, L .
PHYSICS OF FLUIDS, 1963, 6 (07) :993-996
[2]  
ANISIMOV SI, 1968, SOV PHYS JETP-USSR, V27, P182
[3]  
[Anonymous], KINETIC THEORY FLUID
[4]   The temperature-jump problem in rarefied-gas dynamics [J].
Barichello, LB ;
Siewert, CE .
EUROPEAN JOURNAL OF APPLIED MATHEMATICS, 2000, 11 :353-364
[5]   The temperature-jump problem for a variable collision frequency model [J].
Barichello, LB ;
Bartz, ACR ;
Camargo, M ;
Siewert, CE .
PHYSICS OF FLUIDS, 2002, 14 (01) :382-391
[6]   Unified solutions to classical flow problems based on the BGK model [J].
Barichello, LB ;
Camargo, M ;
Rodrigues, P ;
Siewert, CE .
ZEITSCHRIFT FUR ANGEWANDTE MATHEMATIK UND PHYSIK, 2001, 52 (03) :517-534
[7]   PARAMETERS OF THE KINETIC LAYER OF ARC-DISCHARGE CATHODE REGION [J].
BEILIS, II .
IEEE TRANSACTIONS ON PLASMA SCIENCE, 1985, 13 (05) :288-290
[8]  
BEILIS II, 1995, VACUUM ARC SCI TECHN
[9]  
Bond M, 2004, PHYS REV E, V70, DOI 10.1103/PhysRevE.70.061605
[10]  
Hertz H., 1882, Ann. Phys., V17, DOI [10.1002/andp.18822531002https://onlinelibrary.wiley.com/doi/pdf/10.1002/andp.18822531002, DOI 10.1002/ANDP.18822531002HTTPS://ONLINELIBRARY.WILEY.COM/DOI/PDF/10.1002/ANDP.18822531002, 10.1002/andp.18822531002, DOI 10.1002/ANDP.18822531002]