Dear Sai.Naga.Bharghava Dorbala

It might be the separation zone in your flow field.

You can change the pressure or Mach number to get rid of this zone.

Or you can change the analysis type from steady-state on the transient.

Regards

Thanks a lot Mr @Andrii Rogovyi

But could you explain me regarding that problem due to separation zone more clearly

Is it somehow related max y+ value?

Dear Sai.Naga.Bharghava Dorbala

y+ value can influence convergence.

But rather you should try to set the transient mode in the calculation. You will watch the parameters change over time. If you will see exactly periodical changes that it will explain your repeating curves in the residuals plot.

Regards

Thanks a lot Mr. Andrii Rogovyi

I'll try like you said and observe the changes

Mr.Andrii Rogovyi

I have changed the analysis from steady to transient .... but i am these periodic curves again . Could you tell me what does this mean?

What is your Courante-Friedrichs-Lewy number?

The must be CFL

I am using 0.5

Shall i try with even more lower value?

Yes, you can. You should set the CFL in the range 0.5-1.0.

I tried with 0.5 it didn't work.

I reduced it 0.25. Though it's ending up with periodic curves.

Is it because lower CFL number?

What does it mean with CFL=0.5 it didn't work?

The residuals plot didn't converge.. and also they appear to be periodic, like the one i have sent as attachment with my query at start

You should decrease the residuals. How many residuals did you have when you used the transient calculation. If you can not decrease the residuals you should increase the number of elements. If you have a separation zone then the residuals periodicity will remain.