CFD Apps - https://cfdapps.appspot.com - is a webbased portal for undertaking application specific Computational Fluid Dynamics (CFD) simulation. This presentation describes the use of the Urban Wind Study App, in particular how to prepare the geometry for analysis, submit the geometry using the portal and what to expect. Do you want to try? Register for a trial at https://cfdapps.appspot.com/registerfortrial.html

1. CFD Apps, a Webportal for CFD
Modelling
Urban Wind Study User Guide

2. Outline
1.Geometry Preparation
2.Analysis Submission

3. Geometry Preparation
Z
X
Align all building with ground
plane.
The App assumes flat ground plane located at the lowest z
coordinate of the submitted geometry.

4. Geometry Preparation
X
Y
Z
North
When preparing the geometry, remember that:
• North is aligned with the y direction;
• The z-direction is the up-direction (i.e towards
the sky).

5. Geometry Preparation
• If submitting geometry using STL file format:
• Use meter units;
• Use a ZIP archive with multiple STL files if required or easier.
• If submitting geometry using the SketchUp file
format:
• Just make sure that the geometry is properly prepared as
mentioned previously;
• Groups and components are acceptable, but just keep the
number of them in the top level small...

6. Analysis Submission
URL: https://cfdapps.appspot.com

7. Analysis Submission
Enter your email address
Select the geometry file
Enter scenario parameters
for up to 6 scenarios:
Wind speed;
Wind height (ie the height
at which the wind speed occurs);
Wind direction.
Click Cancel to close the App
or
Submit to proceed to the next step.

8. Analysis Submission
Select the analysis type from:
Analyse: Run the analysis. Payment will
be processed through PayPal unless you
are registered for invoicing;
Analyse - Free Trial: Run the analysis at
no cost provided that you are registered
for trial and have not yet used all the
trial analysis. Registration is required
prior to submitting the analysis.
OpenFoam Setup: Prepare a openFoam
setup corresponding to the scenario(s)
submitted at no cost.
Cancel: Cancel the analysis.

9. Analysis Submission
Confirmation that the analysis has
been submitted (or canceled) and will
be processed shortly.

10. Analysis Submission
Once the analysis is submitted you should receive emails similar to the one
shown below - openFoam Setup analysis will be slightly different:
Confirmation of simulation start.
There is one simulation per
scenario
Confirmation the analysis
submission including scenario
parameters
Link to CFD simulation results for
download and local post-
processing
Link to result webpage showing
automatic simulation post-
processing

11. CFD Apps
Thank you
Question(s)?
Contact us at info@hibouscientificsoftware.com.au