Hi Everyone,
I am now trying to run a simulation on a 2D breaking wave. I mainly follow the example in this website http://basilisk.fr/sandbox/popinet/wave.c but without using the adaptive mesh refinement.
However, it usually has some empty y range warnings (please see the following figure) . What does this warning mean? This simulation is run with a LEVEL 10 grid to check the grid convergence.

Another problem is that, sometimes it seems running the simulation
with different numbers of cores may lead to the failure of the simulation. For example,
if I use 48 cores to run the simulation, the simulation crashes while if I use
36 cores to run the same simulation, the simulation can continue to run to the target
stopping time (5 wave periods). The crash usually comes after a sequence of empty
y range warning
(please see the
following figure) . Does this warning lead
to crash?

Can anyone help me figure out these problems?
Best regards,
Canwei Jin