[GAMBIT] meshing a circle touching the surface

myworkcfd · June 15, 2017, 07:07

Hi
I want to mesh outside the circle touching a surface.It ca be understood as circle with tangential surface.

-mAx- · June 16, 2017, 01:46

It will bring you high skewed cells, since tangential "part" will be assimilate as a cell with very small angle.
However you can fix the problem by splitting edges forming this sharp angle

myworkcfd · June 19, 2017, 03:57

Thanks for the reply mAx.

Highly skewed elements were found near the contact of the circle and the surface.I have tried to split the zone in different methods.I still find this highly skewed cells problem near the contact region in every method I tried.

Can you suggest the correct method to split.

-mAx- · June 19, 2017, 05:01

can you post a picture in the area where skewed elements are located

myworkcfd · June 19, 2017, 06:07

PFA the pics

-mAx- · June 19, 2017, 07:01

check the picture
Capture.JPG

myworkcfd · June 19, 2017, 07:47

Thanks for the immediate reply mAx.

If we delete those surfaces as indicated by you, are we not approximating the surface to be touching another surface instead of point touching a surface?

Will that not matter if the bottom line (not the circle) is a heater surface?

Is this approximation correct?

-mAx- · June 19, 2017, 08:16

Quote:

Originally Posted by myworkcfd

Will that not matter if the bottom line (not the circle) is a heater surface?

I didn't take this condition in count.

You have to wonder how many surface ratio did you supress by deleting those surfaces?

I am not an termal expert

myworkcfd · June 20, 2017, 04:37

Thank you mAx.

I will follow this and will check after the post processing.

June 15, 2017, 07:07	meshing a circle touching the surface	#1
myworkcfd New Member Join Date: Jun 2017 Posts: 20 Rep Power: 8	Hi I want to mesh outside the circle touching a surface.It ca be understood as circle with tangential surface.

June 16, 2017, 01:46		#2
-mAx- Super Moderator Maxime Perelli Join Date: Mar 2009 Location: Switzerland Posts: 3,297 Rep Power: 41	It will bring you high skewed cells, since tangential "part" will be assimilate as a cell with very small angle. However you can fix the problem by splitting edges forming this sharp angle __________________ In memory of my friend Hervé: CFD engineer & freerider

June 19, 2017, 05:01		#4
-mAx- Super Moderator Maxime Perelli Join Date: Mar 2009 Location: Switzerland Posts: 3,297 Rep Power: 41	can you post a picture in the area where skewed elements are located __________________ In memory of my friend Hervé: CFD engineer & freerider

June 19, 2017, 07:01		#6
-mAx- Super Moderator Maxime Perelli Join Date: Mar 2009 Location: Switzerland Posts: 3,297 Rep Power: 41	check the picture Capture.JPG __________________ In memory of my friend Hervé: CFD engineer & freerider

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June 19, 2017, 03:57		#3
myworkcfd New Member Join Date: Jun 2017 Posts: 20 Rep Power: 8	Thanks for the reply mAx. Highly skewed elements were found near the contact of the circle and the surface.I have tried to split the zone in different methods.I still find this highly skewed cells problem near the contact region in every method I tried. Can you suggest the correct method to split.

June 19, 2017, 07:47		#7
myworkcfd New Member Join Date: Jun 2017 Posts: 20 Rep Power: 8	Thanks for the immediate reply mAx. If we delete those surfaces as indicated by you, are we not approximating the surface to be touching another surface instead of point touching a surface? Will that not matter if the bottom line (not the circle) is a heater surface? Is this approximation correct?

June 20, 2017, 04:37		#9
myworkcfd New Member Join Date: Jun 2017 Posts: 20 Rep Power: 8	Thank you mAx. I will follow this and will check after the post processing.