Help with 2d mesh with complex curve (fluent)
 

Good morning CFD online, i've been trying to simulate the performance of a rocket combustion chamber+nozzle, but unfortunely the simulation always tend to make the resiuduals jump after (90-500itr), so i assume this is due to the mesh quality, since the nothing seems to fix it.

im almost sure this instabilities derive from a certain spot on the mesh, more precisely where the converging part of the nozzle starts:

https://www.cfd-online.com/Forums/at...1&d=1611949127

i cannot find any information on how to reduce this section's skewness.

Looking forward to fix this issue !