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SimScale guide

2. Prepare the Model

for the Simulation 

2.1 CAD Import

In order to upload our CAD to the SimScale Workbench, we have two options. The instructions of each are:

 

  • Create a new project

    1. Go to the SimScale dashboard and click on "New project".

    2. Enter a project title and description

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  • Use one of the templates preloaded in the Tools & Templates section.

    1. Go to the Simscale Tools & Templates page

    2. Choose one of the models

    3. Once the model opens in SimScale, click on the "Copy" button

    4. This will copy the model to your profile, where you will be able to change its name and description, and upload your own geometry

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Now that we have initialized our project, upload your CAD file onto the SimScale Workbench following these steps:

 

  1. Open the upload dialogue by clicking the ‘+’ button next to Geometries in the simulation setup tree.

  2. Drag and drop your CAD file or click to open the file selection dialogue

  3. Click the ‘Import’ button to finish uploading your model.


Now you will be able to see your model under the Geometries section of the navigation tree on the left side of the screen.

2.1 CAD Import

2.2 GEOMETRY OPERATIONS

Once the model has been uploaded, it is possible to apply geometric operations to modify it so it fits our simulation needs. We will be using the following: Scaling and Open Inner Region

2.2.1 Scaling

Scaling allows us to change the size of our model. This is important since TinkerCAD, our modeling software, has a maximum size. During the CAD import step, SimScale will automatically convert the model dimensions from mm to m. In order to use our model, we will apply a scaling factor of 0.04-0.05. We will have to keep this in mind when working with our tools and templates, and when creating new models.

2.2.2 oPEN iNNER rEGION

By creating an "Open Inner Region", we are using our model to generate a fluid volume with limited openings to the outside worlds. Additionally, this process greatly simplifies the computing of our model, since it merges all the inner elements of our space, focusing on the interaction of our fluids inlets and outlets. To do this, we will follow these steps:

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  1. Select the boundary faces that lie between the external environment and the internal region (highlighted in blue)

  2. Select one internal seed face (pink)

  3. Run the extraction

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Figure 1: Open inner region assignment

2.2 Geometry Operations
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