[GAMBIT] Bubble modelling to simulate shape oscillations

akash · January 30, 2013, 09:13

Hello,

I'm trying to simulate a single bubble shape oscillation and I needed help in modelling it.

I created the grid using Gambit. The problem I'm facing is that the bubble interface is not being exported.

I have a made a square domain. At the center of the domain I've created a edge who's shape is that of the bubble. I meshed the whole square domain and then tried to split the mesh along the bubble interface. I'm getting some errors saying that the split is unsuccessful.

When I tried by creating two faces but meshed only the square domain, the bubble interface doesn't get exported because the other face is not meshed. I do not want to define two separate faces which are non-intersecting and mesh them, as that will not result in a structured mesh.

What I need is that the whole domain must be meshed as shown in the attached figure http://imgur.com/0lFY5jD. Then split the mesh along the bubble boundary so that it allows me to specify two different zones.

Please Help!

akash · January 30, 2013, 11:26

I'm fine if the grid is generated in any other software (Hypermesh or Pointwise or ICEM). At the end of the day, I just need Fluent to identify the two zones explicitly alongwith the bubble interface. Also note that the initial shape of the bubble is complex (not a conic).

For reference I again attach the geometry and grid I'm trying for. http://imgur.com/0lFY5jD

I sincerely request for help, as I'm stuck at this problem since a week.

BrolY · January 30, 2013, 11:32

We need the .stl or .tin file of your geometry to help you.

akash · January 30, 2013, 11:43

Since its a 2D problem I had prepared the geometry using Autocad. Will .dwg or .dxf format suffice?

akash · January 30, 2013, 12:00

I see that we can import .dwg files in ICEM. Here is the link for my geometry. http://www.sharecad.org/CADView.aspx...3-7d0c1b40c205

Here you go. The tin file, I've shared it. http://sdrv.ms/WfwFB0

BrolY · January 30, 2013, 12:02

You should delete this post, and recreate it here :

http://www.cfd-online.com/Forums/ansys-meshing/

akash · January 30, 2013, 12:17

Yeah did that. Please refer to the following link http://www.cfd-online.com/Forums/ans...tml#post405105

January 30, 2013, 09:13	Bubble modelling to simulate shape oscillations	#1
akash New Member Akash Join Date: Jan 2013 Location: India Posts: 20 Rep Power: 13	Hello, I'm trying to simulate a single bubble shape oscillation and I needed help in modelling it. I created the grid using Gambit. The problem I'm facing is that the bubble interface is not being exported. I have a made a square domain. At the center of the domain I've created a edge who's shape is that of the bubble. I meshed the whole square domain and then tried to split the mesh along the bubble interface. I'm getting some errors saying that the split is unsuccessful. When I tried by creating two faces but meshed only the square domain, the bubble interface doesn't get exported because the other face is not meshed. I do not want to define two separate faces which are non-intersecting and mesh them, as that will not result in a structured mesh. What I need is that the whole domain must be meshed as shown in the attached figure http://imgur.com/0lFY5jD. Then split the mesh along the bubble boundary so that it allows me to specify two different zones. Please Help! Last edited by akash; January 30, 2013 at 09:16. Reason: image was not attached

January 30, 2013, 12:00		#5
akash New Member Akash Join Date: Jan 2013 Location: India Posts: 20 Rep Power: 13	I see that we can import .dwg files in ICEM. Here is the link for my geometry. http://www.sharecad.org/CADView.aspx...3-7d0c1b40c205 Here you go. The tin file, I've shared it. http://sdrv.ms/WfwFB0 Last edited by akash; January 30, 2013 at 12:05. Reason: attached the .tin file

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January 30, 2013, 11:26		#2
akash New Member Akash Join Date: Jan 2013 Location: India Posts: 20 Rep Power: 13	I'm fine if the grid is generated in any other software (Hypermesh or Pointwise or ICEM). At the end of the day, I just need Fluent to identify the two zones explicitly alongwith the bubble interface. Also note that the initial shape of the bubble is complex (not a conic). For reference I again attach the geometry and grid I'm trying for. http://imgur.com/0lFY5jD I sincerely request for help, as I'm stuck at this problem since a week.

January 30, 2013, 11:32		#3
BrolY Senior Member AB Join Date: Sep 2009 Location: France Posts: 323 Rep Power: 21	We need the .stl or .tin file of your geometry to help you.

January 30, 2013, 11:43		#4
akash New Member Akash Join Date: Jan 2013 Location: India Posts: 20 Rep Power: 13	Since its a 2D problem I had prepared the geometry using Autocad. Will .dwg or .dxf format suffice?

January 30, 2013, 12:02		#6
BrolY Senior Member AB Join Date: Sep 2009 Location: France Posts: 323 Rep Power: 21	You should delete this post, and recreate it here : http://www.cfd-online.com/Forums/ansys-meshing/

January 30, 2013, 12:17		#7
akash New Member Akash Join Date: Jan 2013 Location: India Posts: 20 Rep Power: 13	Yeah did that. Please refer to the following link http://www.cfd-online.com/Forums/ans...tml#post405105