Proper CFL Number for Breaking Wave Force on Wall
Hi all, I am trying to model a wave-structure interaction problem with DualSPHysics.
For non-breaking wave cases, since there isn't much "impulsive" behavior, the result isn't sensitive to the CFL number.
However, when it comes to breaking wave force, the result is quite sensitive to the CFL number. I get it since the accerleration value may be huge when wave interacts with DBC. From a stability point of view, since the free-surface elevation of all cases are similar and stable, I think all 3 choices of CFL number are fine. However, for accuracy, since I don't have a benchmark to compare to, I am not sure how to choose a better CFL number. Does it make sense to have smaller CFL number since this results in smaller dt?
Thanks for your insight in advance!