To further elaborate on this, flows around structures experience separation and undergo complex interactions in the separated shear layers. To capture these numerically is very challenging. Any small change in the mesh, domain and turbulence model can have major impact on results. There is a dire need to develop or identify robust schemes that can be realized with reasonable computational resources before CFD can become in structural Engineering an alternative design tool.
To further elaborate on this, flows around structures experience separation and undergo complex interactions in the separated shear layers. To capture these numerically is very challenging. Any small change in the mesh, domain and turbulence model can have major impact on results. There is a dire need to develop or identify robust schemes that can be realized with reasonable computational resources before CFD can become in structural Engineering an alternative design tool.