![\"\"](\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/04\/02-04-2023-1680457903-lift_problem.png\")
<\/a><\/p>\nHello all,<\/p>\n
I am currently working on a 3D analysis of a wing model, but I am facing convergence issues at a 6 degree angle of attack. The lift and drag coefficients exhibit unstable behavior, with fluctuations that make it difficult to obtain accurate results. In an attempt to resolve this issue, I modified the wing’s trailing edge to make it blunt, which reduced the skewness value to below 0.9. However, the convergence problem still persists.<\/p>\n
I tried to solve this problem by using Fluent Mesher to generate a polyhedral mesh. The orthogonal quality and skewness values of the mesh were quite good, with a minimum orthogonal value of 0.22 and a maximum skewness value of 0.72. However, when I switched to the solution using the “Switch to Solution” command, I obtained very high drag and lift coefficients. For instance, the lift coefficient increased to around 8000. This issue only occurs when I use the “Switch to Solution” command.<\/p>\n
Could you please help me understand the root cause of these issues? Additionally, I would appreciate any suggestions or recommendations on how to address these problems.<\/p>\n
Thank you in advance for your assistance.<\/p>\n