Hello, thank you for getting back to me. I have uploaded the photos above. I've managed to apply edge sizings which were applied to every tube instead of going through individually. However, this resulting mesh is still very skewed and contains over 10 million elements. Each mesh update is taking 30 plus minutes also. nWhat advice would you give to lower the computational effort and enhance the mesh quality to enable accurate simulations to be carried out . Thank you in advance.n