I am trying to simulate the highly swirl flow in confined tube using axi-symmetric swirl (2D geometry).
Version : 2019 R3,R2,R1 (all gives same)
Geometry : 150mm (dia)X 6145 mm(length) rectangle (axisymmetric cylinder)
Working fluid : Air
Model : RSM , stress-omega
solver : Pressure based
Type : Steady
scheme : SIMPLE for coupling , PRESTO for pressure , SOU's for other
Reynolds no : 50 K
Inlet : Velocity profile (axial,radial, swirl)
outlet : Pressure outlet ( Avg pressure = 0)
I am unable to get zero velocity at the axis when RSM is employed but this kind of problem is not there with other turbulence models. Please help.