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Contact Us
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Morset Sound Development
+47 73915000
Persauneveien 25
7045 Trondheim, Norway
contact@winmls.com
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WinFlag forum
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This forum has been retired and will no longer be monitored.
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Subject Note on the porosity parameter
Date
Mon Apr 7 2003 15:22
Author Tor Erik Vigran
(vigran@tele.ntnu.no)
File: FLAG.dll
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This note concerns the porosity parameter for two porous layer types:
The Porous/Allard-Johnson model: In its present form it does not give correct answers for other porosities than near to 100%. If you intend to use this model for low porosities please download an updated version of the dynamic link library file FLAG.DLL and replace the one found in your System or System32 directory.
The Porous/Mechel model: Actually, this model only applies to high porosity materials even if the porosity is a parameter. Unfortunately, this information is missing in the WinFlag manual. Mechel (the author) himself recommends setting this parameter to 95%, which he assumes applies to most commercial fibre materials.
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