비정상 압축성 유동 해석에서 특성식 WENO 기법과 수치 점성 모델을 적용한 중앙차분법의 성능 및 비용 비교
COMPARISON OF PERFORMANCE AND COST BETWEEN A CHARACTERISTIC-WISE WENO AND CENTRAL DIFFERENCE SCHEMES APPLYING NUMERICAL VISCOSITY MODELS
권현진(군산대학교 기계공학과); 장세명(군산대학교)
23권 2호, 9~15쪽
초록
In the computation of unsteady compressible fluid dynamics, unnecessary numerical oscillations can appear especially for the high-order spatial accuracy in the domain near the sharp discontinuities such as shock or slip line. The WENO(weighted essentially no oscillation) scheme can delete the oscillation of numerical dissipation error, and so can the central difference schemes with numerical viscosity, which have relatively low computational cost. The characteristics of conventional WENO and central difference schemes are compared with each other for a benchmark problem in this study, where LF(Lax-Friedrichs) and Garnier filters are used with ACM(Artificial Compression Method) switch.
Abstract
In the computation of unsteady compressible fluid dynamics, unnecessary numerical oscillations can appear especially for the high-order spatial accuracy in the domain near the sharp discontinuities such as shock or slip line. The WENO(weighted essentially no oscillation) scheme can delete the oscillation of numerical dissipation error, and so can the central difference schemes with numerical viscosity, which have relatively low computational cost. The characteristics of conventional WENO and central difference schemes are compared with each other for a benchmark problem in this study, where LF(Lax-Friedrichs) and Garnier filters are used with ACM(Artificial Compression Method) switch.
- 발행기관:
- 한국전산유체공학회
- 분류:
- 기계공학