Documentation

Post Processing Guide

Post-Processing is the process of extracting the required information from the results generated by the simulation. With SimScale, Post-Processing on is usually also done within the browser. The Post-Processor is based on Ceetron’s technology.

When a successful simulation is finished, the run dialog box will prompt the user with the “Post-process results“. By clicking this button, the user will be taken to the Post-Processing page.

Post Process Results

The Post-Processor can take a little time to present the results.

Post Processor Tools

Post Processing Tools

View Tool Box

The View Tool Box can be used to visualize the model in different view modes – Surface, Transparent Surface, Surface Mesh, Lines, Points, etc. For example, using the Surface Mesh view mode, you can visualize the mesh as shown below:

Surface Mesh View Mode

Filters Panel

The Filters panel consists of all the visualization tools we require to post-process the results.

A list of parts present in the geometry can be found within the “Parts” section in the Filters panel.

Geometry Parts

Note: When there are multiple parts (solids) in your CAD model, they can be hidden from view by clicking the hide button (eye) next to the part names.

A list of available visualization tools is given below:

  • Cutting planes (slices)
  • IsoSurfaces
  • IsoVolumes
  • Animations
  • Particle Traces
  • 2D plots
  • Screenshots

Cutting Planes

Cutting Planes or Slices are used to visualize the results on a particular cross-sectional area.

Steps to create a Cutting Plane:

  1. Select the “+” button near the Cutting Planes option.
  2. Under the Filters panel, now you can see the settings for Cutting Planes. Here you can set the axis in which you want the Cross sectional area (X, Y or Z).
  3. Using the sliding bar, user can set the position of the cutting plane along the selected axis.
  4. The Scalar option allows the user to set the variable to be visualized on the cutting plane.
  5. The Vector option allows the user to set the vectors (usually velocity vectors) on the plane.
  6. Opacity can be used to set the visibility of the plane.
  7. Options “Show Element Mesh” and “Clip model” can be used to visualize the Mesh elements and the geometry along with the cutting plane.
Cutting Plane

 

Iso Surfaces

Isosurface filter can be used to isolate regions in the model which matches the given variable value. For example, if the user wants to visualize particularly the areas where there is pressure is 10 [Pa].

Steps to create an Isosurface:

  1. Create a new Isosurface from the Filters panel using the “+” button.
  2. In the settings below, user can select the flow variable to be visualized and set the Iso value (value to be plotted) and the Opacity level.
  3. In the example below, we have the settings to display the regions with 10 [Pa] pressure.
Isosurface

Isovolumes

Isovolume filter can be used to isolate volume regions in the model which matches the given variable range. For example, if the user wants to visualize particularly the areas where there the pressure is in the range of 10 [Pa] to 100 [Pa].

Steps to create Isovolumes:

  1. Create a new Isovolume from the Filtes panel using the “+” button.
  2. In the settings below, user can select the flow variable to be visualized and set the Iso value range and the Opacity level.
  3. In the example below, we have the settings to display the regions with pressure in the range of 10 [Pa] to 100 [Pa].
Isovolume

Particle Traces

Steps to create Stream Lines/ Particle traces

  1. Create a new Particle Trace from the Filters panel using the “+” button.
  2. Then in the Filter settings panel, you can see the settings for the Particle traces. Please select the “SEEDS” tab under the settings.
  3. At the bottom of the settings panel, Select the Pick option to and click on the model to set the source point for the stream lines. (As an example, you can pick the inlet faces to see the behavior of the flow near the inlet region)
  4. Also, user can increase the density of stream lines  and the spacing between stream lines using the settings.
Partical Traces

2D Plots

Steps to create 2D Plots

  1. Create a new 2D Plot from the Filters panel using the “+” button.
  2. Then in the Filter settings panel, you can see the settings for the plot. Please select the “DATA” tab under the settings to set the variable to be plotted.
  3. At the bottom of the settings panel, Select the Pick option to and click on the model to plot the data at that point.
  4. Under the “STYLE” tab, the legend and axes title settings can be done.
2D Plots
2D Plots Style settings

Screenshots

Steps to create Screenshots

  1. Place the model in the required position.
  2. Create a new Screenshot from the Filters panel using the “+” button.
  3. You can set custom name to the Screenshot by double clicking the screenshot name.
  4. To download the Screenshot, use the download button at the bottom of the filter settings panel.
Screenshot
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