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

seyedashraf · May 23, 2011, 04:59

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, 07:22

yes post pictures of the mesh, to understand your problem

seyedashraf · May 23, 2011, 08:40

here it is

-mAx- · May 23, 2011, 09:46

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, 07:39

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, 07:43

no you will have 20 volumes

seyedashraf · May 24, 2011, 12:14

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, 01:00

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, 11:03

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

Thanks mAx it worked.

adelait2 · July 4, 2013, 05:42

how can i model a pressure swirl nozzle in gambit?

May 23, 2011, 07:22		#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, 09:46		#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, 07:43		#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, 01:00		#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, 05:42	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, 07:39		#5
seyedashraf Member Omid Seyedashraf Join Date: May 2010 Posts: 49 Rep Power: 15	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, 12:14		#7
seyedashraf Member Omid Seyedashraf Join Date: May 2010 Posts: 49 Rep Power: 15	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, 11:03		#9
seyedashraf Member Omid Seyedashraf Join Date: May 2010 Posts: 49 Rep Power: 15	Splitting the volume was a good idea, gambit couldn't mesh complex volumes like this. Thanks mAx it worked.

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