[ANSYS Meshing] Smoothing options

siw · May 2, 2012, 02:17

Hi,

In ANSYS Meshing (AM) there is an option: Outline > Mesh > Sizing > Smoothing. There are 3 choices for the smoothing: Low, Medium and High.

Since alot of the AM technology has been developed from ICEM CFD how does the AM smoothing feature compare? In ICEM you can choose what element types, smoothing level, smoothing algorithm (Laplace or not) and so on. Whereas, in AM smoothing is limited those 3 names.

Does anyone know what AM is doing in the smoothing (the User Guide does not say) compared to ICEM? I've have tried all 3 and can see an improvement in a mesh but it would be good to get an idea of what's going on, especially when ICEM gives so many choices.

Thanks

PSYMN · May 3, 2012, 09:13

I am not directly involved with that technology in ANSYS Meshing, but I can tell you that it is not an ICEM CFD algorithm...

There are actual numbers behind the scenes, I forget what they are, but setting those simplified settings such as "medium" sets a bunch of smoother settings and off it goes.

They meant it to be simple, but instead it comes across as mysterious. I think there are plans to be more transparent in a future version.

I think they have plans to fix it in future versions, but in the mean time, I will put in a request for better doc.

Gui_AP · June 26, 2019, 10:58

Hello! I'm with the same doubt... Did you find the answer ? My grid is also getting better when setting soothing=high, but I want to understand what is happening.

Gweher · August 13, 2019, 07:40

Hello Guilherme,

In Ansys Meshing, smoothing attempts to improve element quality by moving locations of nodes with respect to surrounding nodes and elements. The low, medium, or high option controls the number of smoothing iterations along with the threshold metric where the mesher will start smoothing.

You can also change the number of smoothing iterations (between 1-20), by default it is 5.

May 2, 2012, 02:17	Smoothing options	#1
siw Senior Member Stuart Join Date: Jul 2009 Location: Portsmouth, England Posts: 733 Rep Power: 25	Hi, In ANSYS Meshing (AM) there is an option: Outline > Mesh > Sizing > Smoothing. There are 3 choices for the smoothing: Low, Medium and High. Since alot of the AM technology has been developed from ICEM CFD how does the AM smoothing feature compare? In ICEM you can choose what element types, smoothing level, smoothing algorithm (Laplace or not) and so on. Whereas, in AM smoothing is limited those 3 names. Does anyone know what AM is doing in the smoothing (the User Guide does not say) compared to ICEM? I've have tried all 3 and can see an improvement in a mesh but it would be good to get an idea of what's going on, especially when ICEM gives so many choices. Thanks

May 3, 2012, 09:13		#2
PSYMN Senior Member Simon Pereira Join Date: Mar 2009 Location: Ann Arbor, MI Posts: 2,663 Blog Entries: 1 Rep Power: 47	I am not directly involved with that technology in ANSYS Meshing, but I can tell you that it is not an ICEM CFD algorithm... There are actual numbers behind the scenes, I forget what they are, but setting those simplified settings such as "medium" sets a bunch of smoother settings and off it goes. They meant it to be simple, but instead it comes across as mysterious. I think there are plans to be more transparent in a future version. I think they have plans to fix it in future versions, but in the mean time, I will put in a request for better doc. Far and siw like this. __________________ ----------------------------------------- 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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June 26, 2019, 10:58		#3
Gui_AP New Member Guilherme Pimentel Join Date: Mar 2019 Posts: 9 Rep Power: 7	Hello! I'm with the same doubt... Did you find the answer ? My grid is also getting better when setting soothing=high, but I want to understand what is happening.

August 13, 2019, 07:40		#4
Gweher Senior Member Gwenael H. Join Date: Mar 2011 Location: Switzerland Posts: 392 Rep Power: 20	Hello Guilherme, In Ansys Meshing, smoothing attempts to improve element quality by moving locations of nodes with respect to surrounding nodes and elements. The low, medium, or high option controls the number of smoothing iterations along with the threshold metric where the mesher will start smoothing. You can also change the number of smoothing iterations (between 1-20), by default it is 5.