COUPLED converging Tip
 

Hello All

I am using a COUPLED as Pressure-velocity coupling scheme, for a low Re(300) study in a chemical reactor. Also using Presto! and Quick as spatial discretization.

First i use standard and 1st order in SIMPLEC, after i change for those ones.

My solution is converging, but with high residues(10e-1)...far away from 10e-4 that i want.

Any tip? Can i change the solution controls....Relaxation factor or under-relaxation factors, without aftecting too much the result?Or can be a mesh trouble?

Thank you all for the help.