[Raman_Chawla]

Hello everyone

I am simulating a swirl (COLD) flow in a small size burner using pointwise and CFD++. The model I used is "preconditioned/Pressure based compressible RG NS/Euler" with realizable K-epsilon model. The flow parameters consist of 2 non-reacting fluids of different densities. The geometry is axisymmetric and I tried to model 2D model of it by two ways.
1. By using the geometric symmetry of the body, I simulated only half of it.
2. By Using the full 2D model of the geometry.

For the first simulation (Using the symmetry of the body) I got the converged result But for the second simulation the residue is oscillating and the output is not giving any meaningful result.

I am trying it for just with normal velocity vector (no swirl given till now).
Pictures attached.
Thanks in anticipation.