To start this tutorial, you have to import the tutorial project into your ‘Dashboard’ via the link above.
The CAD model
Once the ‘Work bench’ is open you will be in the ‘Geometries’ tab.
The CAD model named “heat-sink” would be displayed in the viewer
You can interact with the CAD model as in a normal desktop application
Create a Simulation
To create a new simulation click on the ‘+’ option next to the ‘Simulations’ tab
In this tutorial we want to calculate the heat flux and the temperature distribution in the heat sink due to the convective boundary conditions caused by the surrounding flows. Hence we choose Heat transfer Analysis type.
After clicking ‘OK’, a new tree will be automatically generated in the left panel with all the parameters and settings that are necessary to completely specify such an analysis.
All sections that are completed are highlighted with a green check. Sections that need to be specified have a red circle. While, the blue circle indicates an optional settings that does not need to be filled out
As the time-invariant state should be calculated we select Steady-state under Properties.
Create a mesh
Select the mesh option and set the parameters as shown in figure below
The Tet-dominant mesh algorithm is used by default as this is a FEA application
Set the fineness of the mesh to ‘Coarse’
Click on the Generate button to start the mesh generation operation
As soon as the mesh is finished it is loaded into the viewer (as shown below) and you can interact with it in the same way as with the geometry before.
Use the meshing log to get some general information about the mesh e.g. number of nodes and elements in the mesh.
Adding materials to the domain
Next, add the materials from the ‘Material Library’ for fluid and the solid phases. First, we start with clicking on sub-tree “Materials”, click on ‘+’ from the options panel as shown.
This pops-up a ‘Material Library’ from which we select “Steel” and click on ‘Ok’. This will then automatically load the standard properties for Steel.
Then, select the volume domain and save
Use the Boundary conditions section in order to apply heat flux or temperature boundary conditions. A new boundary condition can be added by clicking on the ‘+’ button next to the ‘Boundary Conditions’ option.
We use a simple boundary condition setup: The heat source is set to be the single face on the bottom of the face where we apply a fixed temperature of 70 degrees Celsius or 343.15 Kelvin.
The second boundary condition is the convective heat flux taking place on all other faces.
so select the bottom heat source face and then invert selection by using the right click and selecting the ‘Invert selection’ option .
set the boundary condition as shown in figure below.
Usethe default Numerics as shown in figure below
If you followed the settings of this tutorial so far especially considering the mesh fineness it is possible to select one computing core for the calculation in the Simulation Control section. For finer meshes it may be necessary to choose a larger instance in order to provide memory and reduce calculation time.
Start a simulation run
The last thing to do for running this simulation is to create a run.
The new run is created by clicking on the ‘+’ symbol next to ‘Simulation Runs’
Give a name to the run and start the run
Once the simulation is finished, select the ‘Solution fields’ under the Run to post process the results on the platform. Or they can be downloaded and post-processed locally (e.g. with ParaView)
Use the integrated post-processing environment for visualizing the results as below
Select results and click “Temperature[node]” to visualize Temperature Profile
Last updated: April 10th, 2019
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