[Aeroengineer]

I am currently working on a CFD analysis of 2D and 3D airfoils. I am using Pointwise to mesh the geometry and using ICEM to convert the .cas file to .msh (to be used on an in house code). The code is a RANS solver and I am using k-omega SST with the y+ value being less than 1.

I have been running unidimensional and compressible simulations but for some reason when I plot the Cp curve it is very unsteady (choppy or erratic). I have included the screenshot of the issue. I am not sure why this is happening.

I have carried out a grid independence study and as you make the grid fine, the unsteady behaviour is even more profound. I am using an o-grid for the mesh and it is normally extruded from the surface.

I have tried different boundary conditions but nothing seems to be working.

[Aeroengineer]

Originally Posted by Aeroengineer

I am currently working on a CFD analysis of 2D and 3D airfoils. I am using Pointwise to mesh the geometry and using ICEM to convert the .cas file to .msh (to be used on an in house code). The code is a RANS solver and I am using k-omega SST with the y+ value being less than 1.

I have been running unidimensional and compressible simulations but for some reason when I plot the Cp curve it is very unsteady (choppy or erratic). I have included the screenshot of the issue. I am not sure why this is happening.

I have carried out a grid independence study and as you make the grid fine, the unsteady behaviour is even more profound. I am using an o-grid for the mesh and it is normally extruded from the surface.

I have tried different boundary conditions but nothing seems to be working.

https://imgur.com/a/coIxnUi this is the new link to the images