[GAMBIT] how to mesh a 3d spiral geometry in gambit

seyedashraf · May 23, 2011, 05:59

Dear friends,

I have created a 3d spiral coil in gambit, now trying to mesh the volume
after finishing the meshing operation the whole geometry shrinks into a 3d shape just like a simple spiral line.

here is the geometry (attach file)

how ever I dont have a screenshot from the meshed status right now
but if you require to see and understand the situation, I can mesh it again and put a screen shot here

thanks in advance.

-mAx- · May 23, 2011, 08:22

yes post pictures of the mesh, to understand your problem

seyedashraf · May 23, 2011, 09:40

here it is

-mAx- · May 23, 2011, 10:46

Try to split your volume into several maller volumes.
Create one (yz) plane and split your volume with the face.
Then the same with (xz or xy I don't see the orientation).
Finally you have subdomains for each 90° angle.
If you still have problem, try to isolate a smaller portion (45°, or 25°, etc...)

seyedashraf · May 24, 2011, 08:39

in this way I would have 8 volumes indeed
am I right ?
I must try this , thanks

seems like it just meshes the geometry along a straight line , not a curvilinear one that is my spiral line that a circle line is extruded along.

-mAx- · May 24, 2011, 08:43

no you will have 20 volumes

seyedashraf · May 24, 2011, 13:14

so I didn't get how to split it just like the way you have mentioned
I'll create the faces and lets see what will happen, will report here
tnx

-mAx- · May 25, 2011, 02:00

create a yz-plane (a surface)
split it with your volume.
Theorically it will separate your volume into 2 subvolumes, but in your case you will have more than one subvolume at each side.
You will understand

seyedashraf · May 27, 2011, 12:03

Splitting the volume was a good idea,
gambit couldn't mesh complex volumes like this.

Thanks mAx it worked.

adelait2 · July 4, 2013, 06:42

how can i model a pressure swirl nozzle in gambit?

May 23, 2011, 08:22		#2
-mAx- Super Moderator Maxime Perelli Join Date: Mar 2009 Location: Switzerland Posts: 3,297 Rep Power: 41	yes post pictures of the mesh, to understand your problem __________________ In memory of my friend Hervé: CFD engineer & freerider

May 23, 2011, 10:46		#4
-mAx- Super Moderator Maxime Perelli Join Date: Mar 2009 Location: Switzerland Posts: 3,297 Rep Power: 41	Try to split your volume into several maller volumes. Create one (yz) plane and split your volume with the face. Then the same with (xz or xy I don't see the orientation). Finally you have subdomains for each 90° angle. If you still have problem, try to isolate a smaller portion (45°, or 25°, etc...) seyedashraf and reza_farzin like this. __________________ In memory of my friend Hervé: CFD engineer & freerider

May 24, 2011, 08:43		#6
-mAx- Super Moderator Maxime Perelli Join Date: Mar 2009 Location: Switzerland Posts: 3,297 Rep Power: 41	no you will have 20 volumes __________________ In memory of my friend Hervé: CFD engineer & freerider

May 25, 2011, 02:00		#8
-mAx- Super Moderator Maxime Perelli Join Date: Mar 2009 Location: Switzerland Posts: 3,297 Rep Power: 41	create a yz-plane (a surface) split it with your volume. Theorically it will separate your volume into 2 subvolumes, but in your case you will have more than one subvolume at each side. You will understand seyedashraf likes this. __________________ In memory of my friend Hervé: CFD engineer & freerider

July 4, 2013, 06:42	pressure swirl nozzle	#10
adelait2 New Member adel Join Date: Jul 2013 Posts: 1 Rep Power: 0	how can i model a pressure swirl nozzle in gambit?

May 24, 2011, 08:39		#5
seyedashraf Member Omid Seyedashraf Join Date: May 2010 Posts: 49 Rep Power: 16	in this way I would have 8 volumes indeed am I right ? I must try this , thanks seems like it just meshes the geometry along a straight line , not a curvilinear one that is my spiral line that a circle line is extruded along.

May 24, 2011, 13:14		#7
seyedashraf Member Omid Seyedashraf Join Date: May 2010 Posts: 49 Rep Power: 16	so I didn't get how to split it just like the way you have mentioned I'll create the faces and lets see what will happen, will report here tnx

May 27, 2011, 12:03		#9
seyedashraf Member Omid Seyedashraf Join Date: May 2010 Posts: 49 Rep Power: 16	Splitting the volume was a good idea, gambit couldn't mesh complex volumes like this. Thanks mAx it worked.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
3-d mesh gambit (cylinder within a cylinder)	Jason	ANSYS Meshing & Geometry	29	October 30, 2015 09:59
Gambit - Mesh Problem for a complex 3D geometry	Nelson	FLUENT	3	May 28, 2012 07:57
Gambit: mesh size to small???	Ralf Schmidt	FLUENT	1	January 28, 2006 02:26
[Commercial meshers] Mesh import from gambit	Kaushik Balakrishnan (Balakrishnan)	OpenFOAM Meshing & Mesh Conversion	5	April 21, 2005 14:42
unstructured vs. structured grids	Frank Muldoon	Main CFD Forum	1	January 5, 1999 11:09