AMR causing volume fraction < 1 inside liquid bulk

[HANGPENG JIANG]

Hello Basilisk users,

I am using the VOF method in Basilisk to simulate liquid droplet combustion. When AMR (adaptive mesh refinement) is enabled, I sometimes observe that cells well inside the liquid bulk end up with values slightly less than 1 (e.g. f = 0.9997), as shown in the screenshots below:

Is there a recommended way to avoid this issue, i.e. to ensure that fully liquid cells remain exactly f = 1 even after refinement/coarsening?

Thank you very much!

Best,

Hangpeng Jiang