Reevaluation of high-order finite difference and finite volume algorithms with freestream preservation satisfied. (12th October 2017)

• Record Type: Journal Article
• Authors: Dong, Yidao; Deng, Xiaogang; Xu, Dan; Wang, Guangxue
• Is Part Of: Computers & fluids. Volume 156(2017)
• Page Start: 343
• Page End: 352
• Publication Date: 2017-10-12
• Subjects: High-order schemes -- Finite difference algorithms -- Finite volume algorithms -- Freestream preservation; Fluid dynamics -- Data processing -- Periodicals; 532.050285
• DOI: 10.1016/j.compfluid.2017.07.020
• Languages: English
• ISSNs: 0045-7930

Abstract

Highlights: Conduct systematic comparisons of high-order FD and FV algorithms based on the coordinate transformation with the freestream preservation satisfied. Demonstrate the importance of the freestream preservation to numerical calculations. Modify the former conclusion that high-order FV algorithms are superior to FD algorithms. Abstract: High-order finite difference and finite volume algorithms based on the coordinate transformation, which satisfy the property of freestream preservation are reevaluated in this paper. The intent here is to modify the conclusion drawn by Casper et al. [28], who claimed that the finite volume implementation was less sensitive to derivative discontinuities. Therefore, for problems with complex geometries, it might pay to use the finite volume algorithm. In the present work, all the cases from Casper et al. are simulated with two advanced algorithms combined with weighting techniques and the importance of the freestream preservation is demonstrated through the comparison. It is concluded that the finite difference algorithm with the freestream preservation satisfied performs as well as the finite volume algorithm and the time consumption of high-order finite difference algorithms is remarkably lower than that of finite volume algorithms in multiple dimensions.