What is the STRAINRATE_MAG(c,t) macro?

tstorm · August 13, 2009, 16:51

I can't seem to find any documentation in the UDF manual what this macro returns. Can anyone tell me?

jalarron · October 13, 2009, 21:29

Are you talking about C_STRAIN_RATE_MAG(c,t)?? Should be the modulus of the mean rate of strain tensor defined as S = sqrt(2*S_ij*S_ji).
see Fluent doc: (file:///usr/Fluent.Inc/fluent6.3.26/help/html/ug/node481.htm#sec-ke-prod)
and file:///usr/Fluent.Inc/fluent6.3.26/help/html/udf/node90.htm#tab-cell-11
this macro will return a real number.

Cheers,
Javier

August 13, 2009, 16:51	What is the STRAINRATE_MAG(c,t) macro?	#1
tstorm Member Join Date: Apr 2009 Posts: 78 Rep Power: 17	I can't seem to find any documentation in the UDF manual what this macro returns. Can anyone tell me?

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October 13, 2009, 21:29		#2
jalarron New Member Javier Larrondo Join Date: Jun 2009 Posts: 17 Blog Entries: 1 Rep Power: 16	Are you talking about C_STRAIN_RATE_MAG(c,t)?? Should be the modulus of the mean rate of strain tensor defined as S = sqrt(2S_ijS_ji). see Fluent doc: (file:///usr/Fluent.Inc/fluent6.3.26/help/html/ug/node481.htm#sec-ke-prod) and file:///usr/Fluent.Inc/fluent6.3.26/help/html/udf/node90.htm#tab-cell-11 this macro will return a real number. Cheers, Javier