[ICEM] Asking for help! How to make biased mesh at multiple locations in swept meshing

harryosu · January 27, 2016, 22:48

Guys!!! Please help on this problem. You can look at the attached picture. What I am meshing is a long semi-circular pipe with zigzag pattern. I have used ANSYS Meshing to generate the mesh by sweeping the entire body along the "zigzag" path. However, what I want to improve in the mesh is that the grid needs to be finer at the zigzag bend spots than any other locations, like the one I show in the attached figure, and I have no idea how to do that in ANSYS Meshing. It only provides a sort of "global" biased sweeping. It cannot allow you to make biased fine mesh at multiple locations. I know probably ICEM CFD can do that job, but I am a newbie and only familiar with ANSYS Meshing environment.

I did begin learning ICEM CFD to solve the problem but this geometry is extremely long in one dimension, and with so many zigzag bend sections, I don't know how to create mesh in ICEM. Please help! Please give some advice on this problem! And also in general how to do the sweeping in ICEM?

Gweher · January 29, 2016, 02:41

Hello Harry,

What you need to use in AM is the sizing feature. rmb> insert > sizing. Select the side edges of your model and apply. Under the sizing definition, change the type to number of divisions and then select the bias type behavior you need.

Easy fix, have fun

harryosu · January 29, 2016, 02:48

Thanks Gwenael!

However, as you can see it has multiple bends (actually in this specific model 60 bends). I just wonder if there is an easy way, something like copy and paste, to do that side edge sizing at all of these bends, otherwise it will be a humongous labor work required... which is definitely not fun

Still thanks for the help!
Harry

Gweher · January 29, 2016, 02:56

Well no there is no other way around if you want to have the mesh you want. And honestly this will take you max 15min, which is nothing basically. I finished to work on a model with ICEM a week ago where I had to associate more than 11'000 edges and curves, you're already lucky that AM takes care of a lot of work and never forget that pre-processing requires nearly 70% of the total time that you need to solve a problem.

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January 29, 2016, 02:41		#2
Gweher Senior Member Gwenael H. Join Date: Mar 2011 Location: Switzerland Posts: 392 Rep Power: 20	Hello Harry, What you need to use in AM is the sizing feature. rmb> insert > sizing. Select the side edges of your model and apply. Under the sizing definition, change the type to number of divisions and then select the bias type behavior you need. Easy fix, have fun

January 29, 2016, 02:48		#3
harryosu New Member Harry Zhang Join Date: Apr 2015 Location: Columbus, Ohio Posts: 10 Rep Power: 11	Thanks Gwenael! However, as you can see it has multiple bends (actually in this specific model 60 bends). I just wonder if there is an easy way, something like copy and paste, to do that side edge sizing at all of these bends, otherwise it will be a humongous labor work required... which is definitely not fun Still thanks for the help! Harry

January 29, 2016, 02:56		#4
Gweher Senior Member Gwenael H. Join Date: Mar 2011 Location: Switzerland Posts: 392 Rep Power: 20	Well no there is no other way around if you want to have the mesh you want. And honestly this will take you max 15min, which is nothing basically. I finished to work on a model with ICEM a week ago where I had to associate more than 11'000 edges and curves, you're already lucky that AM takes care of a lot of work and never forget that pre-processing requires nearly 70% of the total time that you need to solve a problem.