Hi everyone,
Looking at the graph below of my residuals for my project could anyone suggest possible sources of error that I am having with the convergence of k and omega. Is it that my inital guess could be incorrect?
Thanks in advance
Hi everyone,
Looking at the graph below of my residuals for my project could anyone suggest possible sources of error that I am having with the convergence of k and omega. Is it that my inital guess could be incorrect?
Thanks in advance
Hey,
You have quite a lot of runs but I assume you’re talking about the wiggly aspect of your k and omega residuals? It’s tough to tell for sure.
In terms of initialization, you can use this calculator as a reference. k and omega don’t have to be spot on, they just have to be somewhere in the ballpark of the optimal value. For your sims, I’d use something along these lines:
In terms of mesh, you have good layering and y+ is looking pretty good for low AoA simulations. For higher AoA values, you should go with a full resolution approach.
It’s probably also a good idea to extend the domain at least 30 chord lengths up/downstream. Currently you have around 19 chord lengths downstream and 5 upstream.
Hi,
Thank you for that help. As you said, with high AOA my values are way off so full resolution is required. By doing full resolution am I just refining my mesh or changing one of the settings?
Thanks