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[ICEM] ICEM CFX - Mutiple domains – Electric Arc Simulation

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Old   May 6, 2016, 05:58
Default ICEM CFX - Mutiple domains – Electric Arc Simulation
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Lukas
Join Date: May 2016
Location: Germany
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Hey,
I would like to simulate an electric Arc with CFX. For this purpose I created a simply geometry with two solid spheres inside a cylinder for the fluid with ICEM.
The solid spheres are generated and meshed separately. For the fluid domain I created a cylinder with also two spheres, so that I can create an interface for the three domains. You can check the attached pictures. I created for a blocking for the cylinder and excluded the surfaces of the spheres. (I hope so by choosing for the parts to block the cylinder and the spheres’ surfaces) Then I created another blocking for each sphere. (Still for the fluid domain) Afterwards I meshed the geometry and merged the three meshes of the solid spheres and the fluid domain.
If I want to simulate the Arc with CFX, I get the error that there are three isolated domains in the fluid domain. I ensured that there is connectivity between the surfaces of each region und created interfaces for the solid-fluid region.
Then I just simulated the fluid domain without the solid domains (I took the fluid region and didn’t merged them with the solid spheres) and got the same error.
Here’s the error:
[...]
+--------------------------------------------------------------------+
| Checking for Isolated Fluid Regions |
+--------------------------------------------------------------------+
3 isolated fluid regions were found in domain Fluid Domain
[...]


I expect the fault in the participation of the three regions in the fluid domain. My motivation behind this approach was to ensure that only the fluid region will be meshed and that I can create an interface for the solid to fluid surface.

Can you please help me to find a solution to solve this problem? If you have any further questions, feel free to ask.
Kind regards
Lukas

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File Type: jpg Aufbau_Fluid_Domain.jpg (104.0 KB, 10 views)
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Old   May 9, 2016, 05:30
Default Solution
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Lukas
Join Date: May 2016
Location: Germany
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Hey,

I am happy to announce that I found a solution by myself. It was unnecessary to create blocks for the two spheres in the Fluid Domain. Instead I created one block and cut out the spheres. Then it was possible to mesh only the fluid domain and merge the meshes.

Kind regards
Lukas
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arc, interface problem, mutiple domains

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