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Bug fix on Riemann solver and thin shell dynamics for better numerical stability

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@Xiangyu-Hu Xiangyu-Hu released this 28 Feb 14:00
· 2535 commits to master since this release
5188552

In this release, two important bug fixes have been included.

  1. Riemann solver will still be used for fluid-wall interaction, since some cases occasionally lead to very small times steps,
    especially when the resolution is high.
    2, The bug on numerical dissipation for thin shell structure has been corrected.
    Now the simulation of thin shell problems do not require smaller time steps any more.