# Creating different meshes in two different geometries in contact with each other

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 September 29, 2022, 10:12 Creating different meshes in two different geometries in contact with each other #1 New Member   Join Date: Dec 2020 Posts: 7 Rep Power: 4 Hello everyone, I'm trying to do a validation study, but I have a few problems with the mesh part. I have a solid plate and a cooling channel geometry with refrigerant flowing through it. Since it is symmetrical, I divided it into two and applied the symmetry boundary condition. The problem is I want to mesh two fluid and solid domains differently. But I did not understand how to do it. I tried various methods. You can access it from pdf. Meshing_question_compressed.pdf How can I mesh them iindependently? (I am trying to learn cfd. thank you for your patience)

 September 30, 2022, 02:06 #2 Senior Member   Alexander Join Date: Apr 2013 Posts: 2,344 Rep Power: 33 to mesh fluid and solid separably you may do following: 1. simply make 2 different meshes and load them into fluent one by one, assign interface 2. in design modeler (geometry) put fluid and solid zone into different parts (so you will have 2 parts). Go to mesher, created mesh. In name selections define interface between fluid and solid: you need 2 surfaces -> surface of solid part adjusted to fluid and surface of fluid part adjusted to solid (they are overlapped) however, personally I think you don't have any problems with model, try to use other setting. Use more iterations. Z.N.A likes this. __________________ best regards ****************************** press LIKE if this message was helpful

 September 30, 2022, 09:00 #3 New Member   Join Date: Dec 2020 Posts: 7 Rep Power: 4 Thank you for your reply AlexanderZ, As you said , I named one of the conflicting faces as "interface" in the mesh section. When I open the Fluent, I encountered a message like this: ------------------ Fluent can try to improve the mesh quality via the TUI command /mesh/repair-improve/improve-qualityNote: zone-surface: cannot create surface from sliding interface zone. Creating empty surface. Note: zone-surface: cannot create surface from sliding interface zone. Creating empty surface. Note: zone-surface: cannot create surface from sliding interface zone. Creating empty surface. Note: zone-surface: cannot create surface from sliding interface zone. Creating empty surface. ------------------ When I searched for this error on the internet, I read that I need to introduce these overlapping surfaces in Fluent. Did I understand correctly or should I have done the naming differently?

 October 4, 2022, 02:15 #4 Senior Member   Alexander Join Date: Apr 2013 Posts: 2,344 Rep Power: 33 to make it more clear for you, mesh your zones separately, then load in fluent one of them and append another. Next define interface Z.N.A likes this. __________________ best regards ****************************** press LIKE if this message was helpful

October 4, 2022, 04:03
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 Originally Posted by AlexanderZ to make it more clear for you, mesh your zones separately, then load in fluent one of them and append another. Next define interface
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Thank you so much AlexanderZ. I solved the problems.

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