CFD Post-Integration

miladrakhsha · August 31, 2012, 07:35

Hello
I have a problem with CFD post processing, how can we do integration process ?
for example in we want to compute the bulk temperature of a fluid in a section we need to do the below integration. one method is to use function calculator

the function calculator's ability seem insufficient in more complex problem like when it is desire to compute average Nuselt number in the section of a pipe

,

Nu_loc=2r/k*(q_wall/(Twall-Tbulk))
Nu_avg=1/(2*pi)*int(Nu_loc,0,2*pi)

could anyone help me in this?
I cannot even do that in MATLAB due to unstructured mesh I used.
does anybody have any idea?

mjgraf · August 31, 2012, 20:52

look into the CFX Expression Language (CEL).
there isn't anything we have not been able to do with this system.

If you need more complex, you can use the CCL and macro/session files to add perl programming.

ghorrocks · September 1, 2012, 07:23

You can also use the worksheet calculator to enter lots of more complex equations than the function calculator.

miladrakhsha · September 1, 2012, 08:03

Quote:

Originally Posted by ghorrocks

You can also use the worksheet calculator to enter lots of more complex equations than the function calculator.

Sorry I am kind of beginner in CFX
I searched the index for the worksheet calculator but I got nothing
would you be so kind to explain more?

ghorrocks · September 2, 2012, 19:08

Have a look at the "table Viewer" tab at the bottom of the CFD-Post page.

August 31, 2012, 07:35	CFD Post-Integration	#1
miladrakhsha New Member miladrakhsha Join Date: Aug 2012 Posts: 29 Rep Power: 13	Hello I have a problem with CFD post processing, how can we do integration process ? for example in we want to compute the bulk temperature of a fluid in a section we need to do the below integration. one method is to use function calculator the function calculator's ability seem insufficient in more complex problem like when it is desire to compute average Nuselt number in the section of a pipe ,Nu_loc=2r/k(q_wall/(Twall-Tbulk)) Nu_avg=1/(2pi)int(Nu_loc,0,2pi) could anyone help me in this? I cannot even do that in MATLAB due to unstructured mesh I used. does anybody have any idea?

August 31, 2012, 20:52		#2
mjgraf Senior Member Join Date: Dec 2009 Posts: 131 Rep Power: 19	look into the CFX Expression Language (CEL). there isn't anything we have not been able to do with this system. If you need more complex, you can use the CCL and macro/session files to add perl programming. miladrakhsha likes this.

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September 1, 2012, 07:23		#3
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,700 Rep Power: 143	You can also use the worksheet calculator to enter lots of more complex equations than the function calculator.

September 2, 2012, 19:08		#5
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,700 Rep Power: 143	Have a look at the "table Viewer" tab at the bottom of the CFD-Post page.