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ECOTECT Tutorial: Display Air Flow Values

Synopsis

While ECOTECT is not currently able to perform CFD analysis of ventilation and air-flow, it is possible to export the model to applications such as FDS and WinAir to perform these calculations, and then import these results back into ECOTECT. This tutorial explains how to display air flow values using the analysis grid, if they have been previously calculated for a model.

Duration

You will need about 10 minutes to complete this tutorial.

Training and Accreditation

Successfully completing this tutorial fulfills two of the practical skills required for completing Level 1 of the Air Flow & Ventilation training module.

Resources Required

To complete this tutorial, download and open the TenerifWind.eco file located under the File Attachments section of this tutorial.

Tutorial

Displaying air-flow values
  1. Open the example file. It consists of a model imported from another 3D CAD application, and contains air-flow values previously calculated and imported from FDS.
    The example file contains air flow values previously calculated using an external CFD analysis application.
    The example file contains air flow values previously calculated using an external CFD analysis application.
  2. Air flow values that have been previously calculated for an ECOTECT model are stored in the analysis grid. Turn on the analysis grid, and air flow values will be displayed. However, depending on the current view, it may be difficult to view these values in relation to the model.
    Air flow values are stored in the analysis grid, but they may be difficult to visualise depending on the current view of the model.
    Air flow values are stored in the analysis grid, but they may be difficult to visualise depending on the current view of the model.
  3. To improve the clarity of the displayed air flow values, click on the Visualise tab, and under the Visualisation panel, select the Cut Away Section option under the Section Plane section. Click the Choose Sectional Axis button, and select the 5. Z Axis (+ve) option. Use the slider to adjust the height of the section. Using these display options, it is possible to see the air flow values more clearly in relation to the model.
    Adjust the display options to # improve the clarity of the displayed air flow values.
    Adjust the display options to # improve the clarity of the displayed air flow values.
  4. You can also adjust the projection display - select the View » Plan[xy] menu to display a plan view of the model.
    Air flow values shown in plan.
    Air flow values shown in plan.
  5. Additionally, because air flow values are calculated in 3D, you can also display air flow in a vertical section view. Set up a vertical section view of the model under the Visualisation panel. Now click on the Analysis Grid panel - under the Slice Position section, set the axis to correspond with the vertical section plane (in this case, use the XZ axis). You can also use the offset slider to change the analysis grid slice position.
    Air flow values shown in a vertical section view.
    Air flow values shown in a vertical section view.
Displaying other ventilation data

  1. Adjust the model and analysis grid display to a sectional plan view. Using the Data & Scale section of the Analysis Grid panel, use the drop-down list to select and display other ventilation values stored in the analysis grid. These values have also been calculated using an external CFD application.
    Cell Temperature.
    Cell Temperature.
    Cell Pressure.
    Cell Pressure.
    Flow Vectors.
    Flow Vectors.
  2. If the Analysis Grid panel is active, use the scroll wheel on the mouse to adjust the analysis grid slice position.
Ecotect Tutorial : Working with graphs
Ecotect Tutorial: Manipulate Model Views

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Sizing Flow Vector Arrows and Surface Normals

comment posted by Olivier :: 31 July 2008 - 8:54pm

Quick tip here on sizing the Flow Vector Arrows, whether in CFD or Daylighting simulation: the arrows can be sized by adjusting the Point Size in the Display Settings panel. This also aplies to Surface Normal arrows. This is convenient when dealing with complex model when the surface normals are so large that it makes the entire model unreadable.


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