2 Way FSI: FLUENT and ANSYS Mechanical- Some information sought

anand32 · February 20, 2018, 19:01

Dear All

I am a PhD student who is carrying out FSI of channels with fluid flow.

My question is:

In the algorithm for dynamic mesh update in FLUENT, among the various smoothing options, there is the option of "DIFFUSION". Is this "DIFFUSION" option valid for tet meshes only or is it valid for hex meshes as well? Please let me know.

Thank you

Anand

Far · February 21, 2018, 00:38

Hi Vishal.

You can use smoothing option for hexa also. But hexa have more tendency to get distorted in process.

anand32 · February 21, 2018, 17:22

Okay Thanks Sijal.

I understand that there are two settings for dynamic meshes, one is "global" other is "local", which is for each zone.

What is the difference between global settings and local settings for dynamic mesh? Do we need to define both? Or do we need to define only one?
Also, what is the precedence when both local and global settings are defined?
Which one is followed?

Please advise.

February 20, 2018, 19:01	2 Way FSI: FLUENT and ANSYS Mechanical- Some information sought	#1
anand32 Member Vish Join Date: Dec 2016 Location: Purdue University, IN, USA. Posts: 59 Rep Power: 14	Dear All I am a PhD student who is carrying out FSI of channels with fluid flow. My question is: In the algorithm for dynamic mesh update in FLUENT, among the various smoothing options, there is the option of "DIFFUSION". Is this "DIFFUSION" option valid for tet meshes only or is it valid for hex meshes as well? Please let me know. Thank you Anand

February 21, 2018, 00:38		#2
Far Senior Member Sijal Join Date: Mar 2009 Location: Islamabad Posts: 4,558 Blog Entries: 6 Rep Power: 54	Hi Vishal. You can use smoothing option for hexa also. But hexa have more tendency to get distorted in process. anand32 likes this.

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February 21, 2018, 17:22		#3
anand32 Member Vish Join Date: Dec 2016 Location: Purdue University, IN, USA. Posts: 59 Rep Power: 14	Okay Thanks Sijal. I understand that there are two settings for dynamic meshes, one is "global" other is "local", which is for each zone. What is the difference between global settings and local settings for dynamic mesh? Do we need to define both? Or do we need to define only one? Also, what is the precedence when both local and global settings are defined? Which one is followed? Please advise.