Reply To: Mesh adaption of cells that are not being marked

[Rob]

I have no idea re the inlet as I have no idea what is set. Or what you're modelling. 

Registers of gradient will trigger only when that criterion is met. So, if you have a small patch with lower gradient you may have a "hole" in the register. That then causes odd mesh adaption. If you've not set the coasening criterion (assuming a moving shock) the it's anybody's guess how the mesh will finish up.