S-Space College of Engineering/Engineering Practice School (공과대학/대학원) Dept. of Mechanical Aerospace Engineering (기계항공공학부) Journal Papers (저널논문_기계항공공학부)
점성 및 비점성 유동장 해석을 위한 BGK 수치기법의 효율적 계산
Efficient Calculation of Gas-kinetic BGK scheme for Analysis of Inviscid and Viscous Flows
- 채동석; 김종암; 노오현
- Issue Date
- 한국전산유체공학회지, Vol.3 No.2, pp. 65-72
- 공학; 볼츠만 방정식; ßoltzmann Equation; BGK 근사; BCK Approximation; 수렴 기속화; Convcrgcnce Acceleration
- From the Boltzmann equation with BGK approximation, a gas-kinetic BGK scheme is developed and methods for its efficient calculation, using the convergence acceleration techniques, arc presented in a ffamework of an implicit time integration. The characteristics of the original gas-kinetic BGK scheme are improved in order for the accurate calculation of viscous and heat convection problems by considering Osher's linear subpath solutions and Prandtl number correction. Present scheme applied to various numerical tests reveals a high level of accuracy and robustness and shows advantages over flux vector splittings and Riemann sliver approaches from Euler equations.