# [ANSYS Meshing] Defining total thickness for inflation. What is growth rate?

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 August 13, 2013, 22:00 Defining total thickness for inflation. What is growth rate? #1 Member   Join Date: Jan 2013 Posts: 38 Rep Power: 4 Is there any way to define the total thickness for the amount of inflation layers you specify? In local inflation, you have an option called "total thickness," but the name is very misleading since it only allows you to define the "maximum" thickness of the inflation layer rather than the "total" thickness of all inflation layers. Also, what is growth rate for inflation?

 August 14, 2013, 10:33 #2 Senior Member     Simon Pereira Join Date: Mar 2009 Location: Ann Arbor, MI Posts: 2,662 Blog Entries: 1 Rep Power: 36 there are 4 parameters; initial height, ratio, number of layers and total height. You can 3 of them and the 4th will be calculated. Total height is the total thickness when you specify the initial height, a growth ratio and a number of layers... If you specify the total height, you need to leave one of the other parameters (usually height or ratio) blank so the equation isn't over constrained. the growth ratio is the ratio of one layers thickness over the layer below it. __________________ ----------------------------------------- Please help guide development at ANSYS by filling in these surveys Public ANSYS ICEM CFD Users Survey This second one is more general (Gambit, TGrid and ANSYS Meshing users welcome)... CFD Online Users Survey

August 14, 2013, 12:31
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 Originally Posted by PSYMN there are 4 parameters; initial height, ratio, number of layers and total height. You can 3 of them and the 4th will be calculated. Total height is the total thickness when you specify the initial height, a growth ratio and a number of layers... If you specify the total height, you need to leave one of the other parameters (usually height or ratio) blank so the equation isn't over constrained. the growth ratio is the ratio of one layers thickness over the layer below it.
Under "Inflation Option," I can choose from one of the following:
1) total thickness (which actually defines the maximum thickness of one thickest layer)
2) first layer thickness
3) smooth transition
4) first aspect ratio
5) last aspect ratio

 August 14, 2013, 12:36 #4 Senior Member     Simon Pereira Join Date: Mar 2009 Location: Ann Arbor, MI Posts: 2,662 Blog Entries: 1 Rep Power: 36 Oh, sorry, you are using ANSYS Meshing. I was talking about ICEM CFD. My bad... Take a quick look at the help for the definitions and for how to setup prism differently. __________________ ----------------------------------------- Please help guide development at ANSYS by filling in these surveys Public ANSYS ICEM CFD Users Survey This second one is more general (Gambit, TGrid and ANSYS Meshing users welcome)... CFD Online Users Survey

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