Cures for Shock Instability: Development of an Improved Roe scheme

충격파 불안정성을 제거한 개선된 Roe 수치기법의 개발

  • 김성수 (서울대학교 항공우주공학과) ;
  • 김종암 (서울대학교 항공우주공학과) ;
  • 노오현 (서울대학교 항공우주공학과) ;
  • 홍승규 (국방과학연구소)
  • Published : 2001.05.01

Abstract

This paper deals with the development of shock stable scheme that is free from shock instability. Roe's FDS is known to preserve good accuracy but to suffer from shock instability, i.e. the carbuncle phenomenon. As the first step toward the shock stable scheme, Roe's FDS is compared with HLLE scheme to identify the source of shock instability. Then control function f is introduced into the pressure term in Roe's FDS to cure shock instability. Various numerical tests concerned with shock instability are performed to demonstrate the shock stability of the proposed scheme.

Keywords