yes mesh quality affect the solution convergence..if you use very dense fine mesh then the material is going to be more stiff and converge with actual solution..to find out the correct mesh for the analysis, you have to do trial analysis with varying density of the mesh and find the right combination of mesh..I recommend you to read software manual also for better understanding..all the best..

Dear La Ode,

of course the mesh has an influence on the convergence behaviour. Here you should also be aware, that in fluent not only the density of the mesh, but also the growing rate of the elements and so the difference between the smallest and largest element play a significant role. You can find a lot of helpful information about the meshing and the FVM here:

https://www.cfd-online.com

Best regards,

Antoni Artinov

thanks a lot Mr. Karthigeyan and Mr. Antoni . I think so,

actually I get "reversed flow" instead of convergence solution in my solution. (D-section )

I do not think to enlarge my domain size in outlet because of same domain size in rectangular object is convergence. it shows better quality mesh rather than D-setion.

I assume, it perhaps due to mesh quality.

do you have any additional suggestion relate "reversed flow" instead of mesh quality?

regards

I got a solution for that by increasing mesh density and modify growth rate.

thanks a lot Mr. Antoni

regards

La Ode Ahmad Barata How can we modify growth rate in ICEM CFD?

Dear Rupaly,

Sorry, I used icem just only one case of meshing. As for me icem is more difficult

Now, i am using pointwise for meshing

@La Ode Ahmad Barata Is pointwise more suitable for meshing of complex biological geometries than ICEM CFD?

Rupali Pandey, you could find videos of pointwise on google, some students in our lab build their mesh using this meshing tool such wind/water turbine blade, nozzle, etc. my case is simple geometry of bluff bodies