January 5, 2023 at 2:59 amLee ByeongGwonSubscriber
Hi, I'm ansys fluent beginner and student version user.
I want to make mesh with same size in specific area, and other is not, with total 2*10^5 mesh.
how can I control mesh size? I'm now analysis in 2D (Part body to Surface body using thin/surface tools).
left figure is mine, and I want to make like right figure.
in left, I use Edge sizing with walls, and change Elements size, Growth rate. but there are no notable changes.
January 5, 2023 at 1:58 pmC NAnsys Employee
I recommend you to use ansys fluent watertight workflow geometry in that use the local refinement region option to create a specific mesh size in specific regions. For further understanding please refer this Ansys innovation course . Hope this may solve your problem.
January 6, 2023 at 3:00 amLee ByeongGwonSubscriber
Thank you for your reply. now I register the lecture
January 5, 2023 at 3:10 pmRobAnsys Employee
To add, make sure you have CFD Fluent (or CFX) set in the meshing preferences. That looks like a fluidic oscillator so you want a fine mesh on that whole region: you may want to split the faces to allow better control of the cell size and don't just rely on inflation.
January 6, 2023 at 3:07 amLee ByeongGwonSubscriber
Yes, I set this file in Fluid Flow(Fluent) because I want to see Mach number, Pressure animation, and it's exactly fluidic oscillator.
Previously, I try to use face split with edge sizing, but it didn;t work properly. thkin about that, maybe my setting was wrong.
I'll check face split manual. thank you.
January 6, 2023 at 9:40 amRobAnsys Employee
Don't apply too many local sizing options, use size functions etc and remember to focus cell count in areas with high gradients. The y+ criterion is just ONE of the things to consider, the trap is that many only consider y+ so don't get a very good solution. An oscillator with shocks, that's going to be an interesing simulation!
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