English
Log in
English
Documentation
Help > Solve > OnScale Solve Simulation Tutorials > Printed circuit board (PCB)

Printed circuit board (PCB)

This simulation tutorial will guide you through:

  • Importing a multipart assembly
  • Applying thermal power and convection boundary conditions
  • Choosing a mesh setting and running the simulation
  • Viewing the temperature distribution in the simulation results

To get started, you’ll need to download PCB.step to your computer.

Download

Looking for a video? Check out Connecting rod. It's a different model, but the steps shown there are broadly the same as the steps described below.

Import the CAD file

  1. In OnScale Solve, from the Projects tab of the dashboard, create a new project.
  2. In the Modeler, import the CAD file. Select Meters as the length unit.

Assign the materials

  1. Using the tree, select Part 14, Part 13, Part 12, Part 11, and Chip.
  2. Using the Material dropdown in the properties panel, search for Silicon and assign to the selected parts.
  3. Using the Selection Tool, change the selection to Part Selection and click on Heatsink.
  4. Using the Material dropdown in the properties panel, search for Aluminum and assign to the selected part.
  5. Using the tree, select TIM and using the Material dropdown in the properties panel, search for Thermal Grease and assign to the selected part.
  6. Using the tree, select PCB and using the Material dropdown in the properties panel, search for Glass and assign to the selected part.

Add the power sources

  1. Click on the icon and click on Part 11, Part 12, and Part 13.
  2. Select the Physics tab.
  3. In the toolbar, under the Thermal Physics icon   , select  -> Power and enter 0.2 W under the Power field.
  4. Click on the icon and select Part 14.
  5. Select the Physics tab.
  6. In the toolbar, under the Thermal Physics icon , select  -> Power and enter 0.05 W under the Power field.
  7. Click on the  icon and select Chip.
  8. Select the Physics tab.
  9. In the toolbar, under the Thermal Physics icon , select  -> Power and enter 20 W under the Power field.

Add the convection coefficient

  1. Click on the icon and expand ‘Heatsink’ in the Model Tree.
  2. Hold down Shift and select faces from Face 0 to Face 41.
  3. Select the Physics tab.
  4. In the toolbar, under the Thermal Physics icon , select  -> Convection Coefficient and enter 15  W/m^2 deg. C under the Convection Coefficient field.

Run a simulation

  1. Select the Simulator tab.
  2. In the properties panel, select MESH & ESTIMATE. This automatically meshes your model, estimates how long the simulation will take to run, and estimates what the likely core-hour cost will be.
  3. Once the meshing and estimation process has finished, use the cost–time slider to select the level of computational resource that you want to use for this simulation.

    By using additional computational resources for the simulation (and hence spending additional core-hours), the simulation can be completed faster.

  4. Select RUN to run the simulation.

Analyse the results

  1. Once the simulation has finished, select View results to open the results in the Results tab.
  2. In the controls, expand Dataset and then select Temperature.