Learning Forum

[galkhamis]

Hi,

 

I am trying to model an overly-simplified version of a greenhouse. The main goal is to see the effect of the type of the materials used for the inner layer cover on the temperature of the air inside the greenhouse. I attached the geometry that shows the two regions/volumes of air inside the model. what I need is to build a layer (with finite thickness and assigned materials) in between the two air volumes inside the greenhouse and a layer on top of the greenhouse. Is there a simple way to do that in Discovery without messing up the mesh? I attached a picture of targeted layers within the model. In the picture, Area 1 and Area 2 are the volumes built in the geometry file, and the outer and inner layers are the boundaries that I want to build. Thanks.

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[Naresh Patre]

Hello galkhamis

I noticed that you have performed Share Topology operation between the 2 bodies. Since we need to create additional bodies, unshare all the faces and edges.

Select the 3 inner layer faces of any body. Then right and select Copy, and then Paste. This will create a new surface body for the inner 3 faces.

Hide the 2 solid bodies, then click the Pull tool and select all the 3 faces and pull them by an appropriate distance. This will create a thin solid body. You may want to enable Symmetry option from the Options panel if you would like to pull the faces symmetrically on both sides.

Next, display all the 3 solid bodies and click Interference tool from Prepare menu and click the check mark button to complete the operation. You will now see the thin layered volume between area 1 and area 2.

 

Follow similar operations to create thin layered body on the outer side.

Regarding meshing, since the geometry is modified, you will have to remesh the model. Additionally, since you now have thin bodies in the geometry, you will have to ensure minimum 3 mesh elements across the thickness which will increase the mesh count.

[galkhamis]

Naresh Patre 

 

Thank you for the help. I followed your instructions to add the inner layer and checked for interference but the model is not meshing correctly. I am not sure whether it is the geometry or the meshing settings. Can you elaborate your points regarding unsharing the original two volumes and the mesh element across the thickness?

[galkhamis]

Naresh Patre 

 

I attached my attempt here

🛈 This post originally contained file attachments which have been removed in compliance with the updated Ansys Learning Forum Terms & Conditions

[Naresh Patre]

Hello galkhamis

In general, since the inner layer is very fine, you will have to use local sizings to generate a reasonable mesh inside the layer. The geometry looks sweepable along the length of the model, so you can try generating hex mesh with 3 elements across the thickness of inner layer. This will help to keep the mesh count on a lower side.

The file (.wbpj) file that you sent cannot be opened because every AIM project file has one folder associated with it. The best way to send the file is to archive it which will create a single .wbpz file which you can send. You can find detailed information on file archiving in this post.