Jian Fang
Assessment of the low-dissipation monotonicity-preserving scheme in a series of DNS of shock-wave/turbulent boundary layer interactions
Fang, Jian; Yao, Yufeng; Lu, Lipeng
Abstract
The seventh-order low-dissipation monotonicity-preserving scheme developed by Fang et al. (Journal of Scientific Computing, 2013, 56:67-95) was assessed in direct numerical simulations (DNS) of isotropic turbulence and channel flow. The influence of numerical dissipation is investigated by using MP7-LD scheme with different levels of bandwidth dissipation. It is found that, small-scale turbulence fluctuations can be suppressed by high level of scheme dissipation, while numerical errors in terms of high -frequency oscillations appear and could destabilize the computation if the dissipation is reduced to a very low level. Numerical studies show that reducing the bandwidth dissipation to 70% of the conventional seventh-order upwind scheme can maximize the efficiency of the MP7-LD scheme in resolving small-scale turbulent fluctuations and, in the meantime preventing the accumulation of non-physical numerical errors.
Presentation Conference Type | Conference Paper (unpublished) |
---|---|
Conference Name | The 9th International Conference on Computational Physics (ICCP9) |
Start Date | Jan 7, 2015 |
End Date | Jan 11, 2015 |
Publication Date | Jan 7, 2015 |
Peer Reviewed | Not Peer Reviewed |
Keywords | low-dissipation, DNS, shock-wave, turbulent boundary |
Public URL | https://uwe-repository.worktribe.com/output/839572 |
Publisher URL | http://www.physics.nus.edu.sg/iccp9/ |
Additional Information | Title of Conference or Conference Proceedings : The 9th International Conference on Computational Physics (ICCP9) |
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