[mazhar16823]

Hi,

I ran the simulation while using SST Transition model in STARCCM+ with following settings:

Free stream edge function for SST Transition Model = $WallDistance>0.005?1:0

I made following selections in physics continua:

All y+ Treatment
Gamma Re-Theta Transition
Constant Density
Segregated flow
Steady
SST (Menter) K-Omega
3D
Turbulent
In initial conditions, I changed the incoming flow velocity= -9 m/s.

In Reports>Drag Coefficient: Direction (0, 0, 1) because inflow is in z-direction and in coordinate system z-axis is pointing opposite to the flow direction.


Reference velocity= -9 m/s,

Reference Area = frontal area for the blade calculated in Report

REGIONS:

Inner Geometry (Blade) => Boundary Type = Wall; Reference Frame: Lab Frame (same for other boundaries)

Velocity Inlet: Flow Direction: [0,0,-1]

With all this monitor plot for the Drag Coefficient experiences small increasing oscillations and residuals also jump after decreasing for a while.

Any suggestions please? What could go wrong?

[mazhar16823]

Originally Posted by mazhar16823

Hi,



I ran the simulation while using SST Transition model in STARCCM+ with following settings:





Free stream edge function for SST Transition Model = $WallDistance>0.005?1:0



I made following selections in physics continua:



All y+ Treatment
Gamma Re-Theta Transition
Constant Density
Segregated flow
Steady
SST (Menter) K-Omega
3D
Turbulent
In initial conditions, I changed the incoming flow velocity= -9 m/s.


In Reports>Drag Coefficient: Direction (0, 0, 1) because inflow is in z-direction and in coordinate system z-axis is pointing opposite to the flow direction.



Reference velocity= -9 m/s,

Reference Area = frontal area for the blade calculated in Report



REGIONS:

Inner Geometry (Blade) => Boundary Type = Wall; Reference Frame: Lab Frame (same for other boundaries)



Velocity Inlet: Flow Direction: [0,0,-1]



With all this monitor plot for the Drag Coefficient experiences small increasing oscillations and residuals also jump after decreasing for a while.

Any suggestions please? What could go wrong?

https://drive.google.com/file/d/1EjH...ew?usp=sharing