[Fraxiel]

Hello guys, I'm fairly new and fresh to the CFD world. I just graduated as an Aerospace Engineer and I'm trying to get better at Ansys. I took one course in CFD simulation however it does not cover the many cases you might face in the Aerospace Industry. I am having general trouble generating meshes as I don't know what should be placed in areas such as the local sizing mesh size and the other options such as surface and volume mesh in (Fluent Meshing). Currently, I have a case that I'm running to get better and also participating in a competition. The case is our self-designed UCAV. During the meshing, I'm having trouble such as having parts of the wing and tail chipped off. I managed to fix the tail problem by decreasing the local sizing on it however the wing problem just arises out of nowhere for some reason. Also, Ansys Fluent meshing seems a bit moody as the mesh for the wing was perfect previously however when I fixed the problem for the tail it decided to ruin the mesh for the wing. I don't know if this is normal when starting in CFD or not but its driving me crazy not being able to "learn" this from anywhere as every video I watch or course I come across don't explain the things I want to understand such as how to calculate the mesh size for my specified body and a good tutorial on Spaceclaim and Fluent Meshing.

So any good advice from the experienced people here would be appreciated.

Thanks.