CFD(전산유체역학); Nonlinear Interpolation wavelets(비선형 보간 웨이블렛); Sparse Point Representation(희소점 표현법)
2005 대한기계학회 창립 60주년 기념 춘계학술대회 강연 및 논문 초록집, Page. 2,734 - 2,739
In this work, a nonlinear interpolation-based sparse point representation wavelets is presented to effectively represent local nonlinear features of a flow field. The method is an interpolation-based wavelets using locally varying orders of accuracy. We employ the sparse point representation to attain fine compression ratio and to reduce computation workload. The order variation algorithm is applied for the purpose of preserving highly nonlinear features such as shock and vortices. To verify the proposed method, we consider several one-dimensional discontinuity problems, a two-dimensional heat conduction, and a disturbed wave of half sinusoidal shape. From the results, it is shown that the nonlinear interpolation wavelets provides us with high accuracy and fine compression ratio in benign flow including local peculiar features. Thus it may be concluded that the nonlinear interpolation wavelets is highly promising for discontinuous CFD data compressions.