Ahmed Body Drag Validation Problem

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Hi @LWhitson2, I cant comment much on the accuracy of the other projects, unhelpfully, the force coefficients were not added so it makes it more time consuming to check however, I think I might be able to help a bit with your own project and I agree, if we could have a more comprehensive validation project that would be amazing.

Firstly, when I looked at your project, the only simulation setup for me to look at was the first one. When we look at drag, the boundary layer plays a large part, so ensuring that boundary layer modelling is correct is very important. Therefore, I looked at your mesh to see your layer setting and couldn’t see a layer inflation refinement present, so that would be a good start.

Another point is supported by a validation project I did on the NACA 0012 aerofoil, where I original had high drag, and therefore, the steps I took to get good results I ensured I documented it well, the write up is here:

'NACA 0012 Verification' simulation project by dlynch

Verification of Setup for Aerodynamics BrUAS - Who are we? We are a a team of students working on a project run by the Institution of Mechanical Engineers called the UAS challenge. This challenges gives teams the opportunity to design, build test and compete their solution to a problem in the form of an unmanned aerial vehicle. Our team is excited to be sponsored by SimScale and are determined to show how we use SimScale to be successful in this challenge. Introduction It is a common for users …

Particularly about the divergence scheme for velocity and the y+.

Best,
Darren