Autodesk Alias

[#1]

I have been meaning to reply back. Thanks for the conformation that updating your video driver fixed the issue.

[#2]

I've got some issues with Falcon's ability to calculate drag correctly, or it's interpretation of model data and drag.

I can replicate expected figures at low speeds for primitive shapes, but if i place an elongated shape such as a rectangle into Falcon it seems to calculate some areas incorrectly.

For example, I run a test on a very basic rectangle shape with a curved leading edge.  This gets calculated as having a CD of 0.7 with a drag force of 2947 N.

The frontal area of the model is 8.925m, but to have the CD and drag being calculated as it is would require a frontal area of around 11.11m, or an air density of 1.5kg/m3, both of which are incorrect.

Similarly, if the model is rotated before import to requre a 0 degree yaw in Falcon, there are errors in the calculation once again.

Is it possible to divulge some more information regarding how Falcon interprets the geometry model and the airflow / drag readings so that this issue can be troubleshooted?

[#3]

Please send me your file, so I team can play with it, and we can be sure we are seeing the same results.

[#4]

The team has shared with me that the next release will have accurate (error < 0.001%) front area calculated.

[#5]

Thanks to the team for looking at that problem.  Looking forward to the next version; any idea when the next update might be expected?

[#6]

Not sure - I rarely know in advance. Labs is an agile organization that responds quickly, so we don't require advance notice.

[#7]

I'll just check back regularly then.  Looking forward to it!

[#8]

Thanks for the tips. It can help me a lot.

[#9]

Install Standalone
Falcon32bit.exe
2011.0.1.0
Project Falcon 2012
on
Windows XP Pro
Version 2002
SP 3
Pentium 4 3.00GHz
2GB RAM

After installation, attempt to run by clicking installed icon... Get the following error

Falcon Application
Exception caught whilst running WindTunnelApp: 'pack://application:,,,/WPFOpenTK;Component/Themes/ExpanderTemplate.xaml' value cannot be assigned to property 'Source' of object 'System.Windows,ResourceDictionary'. Could not load file or assembly 'System.Core, Version=3.5.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' or one of its dependencies. The system cannot find the file
specified. Error at object 'System.Windows.ResourceDirectory' in markup file 'WindTunnel_CFD;component/mainwindow.xaml'.

Subsequently have to kill WindTunnelApp.exe in the Windows Task Manager.

Any suggestions?

Cheers, Simon

[#10]

Is there any word on a likely release of the next update to Falcon?

Thanks