Hi all,
I am currently modeling a cylinder subjected to a gust of wind. While I figured out how to model a close top cylinder, I could not figure out how can I make the wind blow through the top surface.
https://i.imgur.com/BHW7dGs.png
As shown in this figure, I am simulating a wind tunnel test, and I hope the wind can blow into the cylinder as if the highlighted top surface does not exist. To my understanding, I need to use the "interface boundary condition," and thus I named this surface as "Interface." However, the result is identical with the result in which I do not give the surface a specific name.
Hi,
To create an interface, you need to do two steps; one in the design modeler and the other in Fluent itself. There may be different ways. For simplicity, consider you have two blocks one over the other and you need to define the interface between them. You will need to define each block as a domain so as they appear in Fluent/cell zone conditions as two domains. Then the common surface now will be two coincide surfaces. Then, you name each boundary, e.g. int and int1 even as walls.
In fluent, you will change the boundary type to interfaces from the boundary condition. Hence a new tab in Fluent appears called mesh interfaces. You will need to create the interface in this tab. That is easy by create/edit and give a name for a new interface. Then, specify the boundaries "int" and "int1" in the columns on the middle and right, just one boundary in each column, for example int in the middle and int1 in the right.
Hope that helps
I would suggest to use design modeler and you will find more information about boundary interface(click faces).
The specific name of a surface is irrelevant to the CFD code, being just a name for the user (i.e. you) to identify it. If you want the flow to not see that surface, just select it as "internal" and give to it the same properties of the fluid you are considering.
Otherwise do another analysis removing directly the top surface from the CAD geometry.
Hi,
To create an interface, you need to do two steps; one in the design modeler and the other in Fluent itself. There may be different ways. For simplicity, consider you have two blocks one over the other and you need to define the interface between them. You will need to define each block as a domain so as they appear in Fluent/cell zone conditions as two domains. Then the common surface now will be two coincide surfaces. Then, you name each boundary, e.g. int and int1 even as walls.
In fluent, you will change the boundary type to interfaces from the boundary condition. Hence a new tab in Fluent appears called mesh interfaces. You will need to create the interface in this tab. That is easy by create/edit and give a name for a new interface. Then, specify the boundaries "int" and "int1" in the columns on the middle and right, just one boundary in each column, for example int in the middle and int1 in the right.
Hope that helps
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