한국전산유체공학회:학술대회논문집
- 한국전산유체공학회 2008년 추계학술대회논문집
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- Pages.42-49
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- 2008
2차원 비정상 유동 해석 효율 향상을 위한 Wavelet 기법 응용 연구
RESEARCH ON THE WAVELET METHOD FOR THE IMPROVEMENT OF COMPUTATIONAL EFFICIENCY OF TWO DIMENSIONAL FLOW PROBLEMS
-
강형민
(서울대학교 기계항공공학부)
;
-
홍상원
(서울대학교 기계항공공학부)
;
- 정지훈 (서울대학교 기계항공공학부) ;
-
김규홍
(서울대학교 기계항공공학부)
;
-
이도형
(한양대학교 기계공학과)
;
- 이동호 (서울대학교 기계항공공학부)
-
Kang, H.M.
;
-
Hong, S.W.
;
- Jeong, J.H. ;
-
Kim, K.H.
;
-
Lee, D.H.
;
- Lee, D.H.
- 발행 : 2008.10.24
초록
A wavelet method is presented in order to improve the computational efficiency of two dimensional unsteady flow problems while maintaining the order of accuracy of conventional CFD schemes. First, by using the interpolating wavelet transformation including decomposition and thresholding, an adaptive dataset to a solution is constructed. Then, inviscid and viscous fluxes are calculated only at the points within an adaptive dataset, which enhances the computational efficiency. Second, thresholding step is modified to maintain the spatial and temporal accuracy of conventional CFD schemes automatically by selecting the threshold value between user-defined value and the magnitude of spatial or temporal truncation error. The wavelet method suggested in this study is successfully applied to various unsteady flow problems and it is shown that the computational efficiency is enhanced with maintaining the computational accuracy of CFD schemes.