Parameteric Studies

FrankW · June 17, 2011, 08:32

Hi

is there a possibility to get a access to the Desgin Parameters from the DM in CFX-Pre or CFD-Post?
E.g. i will simulate an tube. In DM, i design an section of the tube with an angel x and in cfd post i would like calculate the massflow of the whole tube so i need the angle x (360°/x*massflow). Or is there an other way to calculate the total massflow

best regards
Frank

ghorrocks · June 17, 2011, 08:45

If you evaluate an expression in CFD-Post which determines your flow rate and set it as a parameter it can then be used as a parameter in workbench.

FrankW · June 18, 2011, 04:25

Thanks, this is a good advice, it works fine

. To this one i have a small problem. In one equation WB tolds me i've an error in unity. Because it isn't possible (speed*unitless should be speed). And sometimes i've got the right value. Could be a bug? I use Ansys 13 SP2.
So back to the original question, is there also a direct access to DM variables in CFX-Pre or CFD-Post?

ghorrocks · June 18, 2011, 07:22

The way to pass variables from DM to Pre and Post is through WB. Looks like you have a problem with the way you set the variable up. Also I have no idea what your comment "In one equation WB tolds me i've an error in unity. Because it isn't possible (speed*unitless should be speed). And sometimes i've got the right value." means.

June 17, 2011, 08:32	Parameteric Studies	#1
FrankW Member Frank Weise Join Date: Mar 2009 Location: Germany Posts: 55 Rep Power: 17	Hi is there a possibility to get a access to the Desgin Parameters from the DM in CFX-Pre or CFD-Post? E.g. i will simulate an tube. In DM, i design an section of the tube with an angel x and in cfd post i would like calculate the massflow of the whole tube so i need the angle x (360°/x*massflow). Or is there an other way to calculate the total massflow best regards Frank

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June 17, 2011, 08:45		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,703 Rep Power: 143	If you evaluate an expression in CFD-Post which determines your flow rate and set it as a parameter it can then be used as a parameter in workbench.

June 18, 2011, 04:25		#3
FrankW Member Frank Weise Join Date: Mar 2009 Location: Germany Posts: 55 Rep Power: 17	Thanks, this is a good advice, it works fine . To this one i have a small problem. In one equation WB tolds me i've an error in unity. Because it isn't possible (speed*unitless should be speed). And sometimes i've got the right value. Could be a bug? I use Ansys 13 SP2. So back to the original question, is there also a direct access to DM variables in CFX-Pre or CFD-Post?

June 18, 2011, 07:22		#4
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,703 Rep Power: 143	The way to pass variables from DM to Pre and Post is through WB. Looks like you have a problem with the way you set the variable up. Also I have no idea what your comment "In one equation WB tolds me i've an error in unity. Because it isn't possible (speed*unitless should be speed). And sometimes i've got the right value." means.