Hi,

In high-swirl rotating turbulent flows, the default settings for the Reynolds Stress Model and wall function can lead to erroneous predictions of the velocity profiles near rotating walls such that there is unphysical dissipation of the swirl in the outer region. The tangential velocity is flatter and decays more slowly resulting in an over-prediction of tangential velocity near the wall.

**Steady-state solver**

Green-Gauss cell-based solver

Pressure-based Coupled Solver

Relative velocity formulation

**Turbulence Model** = RSM

Options

Linear strain

Wall reflection option OFF to avoid impact on swirl

Near-wall Treatment = Non-equilibrium wall function

**Discretization**

Pressure = PRESTO

Momentum = MUSCL

Turbulence = Second-order upwind

**Solver Controls**

Courant number = 100

Under-relaxation Factors

Pressure, Momentum = 0.5

Turbulence = 0.1 (can be increased)