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alpharays786

Eddy viscosity value?

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Hi all,


 


On what basis that we need to consider when to decide setting of eddy viscosity value? For default value I use 1.0 E-05.


For example:


1) air flow in the HVAC duct vent


2) exhaust gas flow in the exhaust pipe


 


Thanks


alpharays


 


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Instead of giving eddy viscosity value, you could also give the input parameters by intensity and length scales.


1e-5 corresponds to low level of turbulence.


 


Check the feature on Defining Turbulence Inflow Parameters including video


http://www.altairhyperworks.com/training/new_feature_videos/12/acusolve.htm


 


http://forum.altairhyperworks.com/index.php?/topic/9726-what-does-direct-turbulence-input-type-mean/


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