convergence problem
 

Dear all,

I am simulating impinging jet inside a room with standard K-e and standard wall function.

After running 7500 interations i still can not obtian steay redisual decay,especially from 5000 continutity appears oscillation and
ε also. I check the whole mass inbalance which is -3.2782e-07

Does anyone can give me any advice to check where is wrong? Which parameters should i take care?

Thanks in advance.