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[ICEM] Creating a Interface for MRF

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Old   April 9, 2013, 13:47
Default Creating a Interface for MRF
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john chant
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Hi All,

I am very new to CFD and using ANSYS for a project that I am working on. For my project I have two cylinders, one inside the other. The inside cylinder represents a rotational domain, while the outside represents a stationary domain. I understand that in order to use Fluent to see how the flow behaves I need to create an interface between the two domains, I am using the surface of the inner cylinder as the interface. Here is where my problem lies, as far as I understand the interface has to have two faces, one being on the rotational side and one being on the stationary side, is this true? Or can I just have an interface with just one face?

If I have to have two faces for the interface, I cannot figure out how to click on the inner face of the inner cylinder. I have suppressed the outer cylinder in order to click on the outer surface of the inner cylinder to create one portion of the interface but I cannot figure out how to click on the inner portion of the cylinder to create the second face (again, if even needed).

So, to summarize, does my interface have to have two faces, one on the inside of the inner cylinder that represents the rotational domain and one on the outer part of the inner cylinder that represents the stationary domain? And if so, how can I pick the inside of the inner cylinder to assign the interface.

Thank you all for taking the time to read through this, again I am a bit of a novice with CFD so please pardon my ignorance and feel free to ask any additional information.
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Old   April 11, 2013, 02:56
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Paritosh Vasava
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Your understanding of the interface is correct.

Yes, you need two surfaces to make an interface.

I am not familiar with ICEM but you can try this.
1. Create mesh without interface in ICEM. Make sure you have two separate zones and both are declared as fluids.
2. In fluent declare the boundaries in question as interface.
3. In 'Create/Edit Mesh Interfaces Dialog Box' create the interface.
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Old   April 15, 2013, 02:06
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Stuart Buckingham
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When you import it into Fluent, the solver will split the domain into "The-name-of-your-interface" and "The-name-of-your-interface-shadow". Then specify the boundary condition as "interior" and Fluent will merge the zones. EASY!

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Old   April 20, 2013, 17:19
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john chant
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Thank you guys...I appreciate both of your responses
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Old   June 19, 2013, 02:12
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Arthur Loginow
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I am having a hard time creating the interface at the mesh, in both 2D and 3D, can you guys help me please?
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Old   June 19, 2013, 07:50
Default do you have solved this problem?
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Hanbing
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Quote:
Originally Posted by john c View Post
Thank you guys...I appreciate both of your responses
do you have solved this problem? how did you set the interface, use the inter and outer face of the inter cylinder? then how to choose the inter face of the inter cylinder? I can not see the “shadow” of it when imported into fluent, or any interior BC in the fluent. can you give any suggestion? thank you!
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