How can I assign a temperature boundary condition to a set of nodes in Simlab?

FranciscoRamirez

Hello experts!

I am trying to solve a steady state heat transfer problem in a solid using Simlab and Optistruct as a solver. I have a simple meshed part as shown below:

and I want to impose a prescribed temperature (e.g. 500 K) on the nodes selected (orange points on the image above). However, Simlab gives only two options (file:///C:/Program%20Files/Altair/2022.3/SimLab/hwx/help/SimLab/english/topics/analysis/ThermalTemperature.htm):

1. Temperature on faces/edges
2. Distributed temperature table

The second option seems to solve my problem, but I need to know the nodal coordinates of the nodes, as shown below:

or nodes IDs, as shown below:

When I select the nodes, I can see the list of nodes with their IDs:

Thus, I can manually enter 336 node IDs and their value, one by one. This can be a challenging task, even for a small problem like mine. Thus, the questions are:

• Can I export the list of selected nodes in Simlab? This is because the value can be assigned more quickly in a spreadsheet and then imported into Simlab.
• Is there any way within Simlab to assign a temperature to the selected nodes directly, as in many other CAE software?

Adriano_Koga

Francisco Ramirez said:

Hello Adriano,

I tried to break the face, but the following error appears:

The other options (Edge, Vertex, etc) are not possible because I have a mesh imported from an .inp file.

Additionally, how to do the other tip (the other option is meant for distribution of space varying temperature)?

 

if it is a solid, then you can 'break' the solid body into smaller regions using this 'from solid elem', first, and then create smaller faces, so that you can select them for applying temperatures.

Adriano_Koga

you need to have a smaller face.

In order to do that, you could first break your larger face into a smaller one, so that this could be selected

Adriano_Koga

Adriano A. Koga_21884 said:

you need to have a smaller face.

In order to do that, you could first break your larger face into a smaller one, so that this could be selected

by the way, the other option is meant for distribution of space varying temperature. Not exactly for your case.

FranciscoRamirez

Hello Adriano,

I tried to break the face, but the following error appears:

The other options (Edge, Vertex, etc) are not possible because I have a mesh imported from an .inp file.

Additionally, how to do the other tip (the other option is meant for distribution of space varying temperature)?

 

Adriano_Koga

Francisco Ramirez said:

Hello Adriano,

I tried to break the face, but the following error appears:

The other options (Edge, Vertex, etc) are not possible because I have a mesh imported from an .inp file.

Additionally, how to do the other tip (the other option is meant for distribution of space varying temperature)?

 

if it is a solid, then you can 'break' the solid body into smaller regions using this 'from solid elem', first, and then create smaller faces, so that you can select them for applying temperatures.

FranciscoRamirez

Hello Adriano,

I tried to follow your instructions, but it creates a body. However, to impose a temperature it is necessary a face or edge or list of nodes. In my case, I only need to impose temperature in some nodes of the whole face:

However, as the model is imported from an .inp file, I need to break "Face 4" in two faces.

Inspired by your response, I create a face from elements (Geometry -> Create [Face group] -> From Elements):

Now, I have 2 faces where I can put my desired boundary conditions:

 

Thanks!

Adriano_Koga

Francisco Ramirez said:

Hello Adriano,

I tried to follow your instructions, but it creates a body. However, to impose a temperature it is necessary a face or edge or list of nodes. In my case, I only need to impose temperature in some nodes of the whole face:

However, as the model is imported from an .inp file, I need to break "Face 4" in two faces.

Inspired by your response, I create a face from elements (Geometry -> Create [Face group] -> From Elements):

Now, I have 2 faces where I can put my desired boundary conditions:

 

Thanks!

great!