Iterative solution within Workbench and Fluent?

WiscMS · December 15, 2010, 14:27

I wanted to see if a task I need to do is possible with these given tools. From the few basic tutorials I have followed for Workbench and Fluent, I can't tell if it is possible.

My geometry and conditions are simple: I have an experiment with laminar flow through a tube with constant heat flux through the wall. I know the mean inlet and outlet temperatures. However, my reynolds number and heat flux measurements are very uncertain. (my temp measurements are good)

The fluid is exotic and high temp (800K). I have UDF's to determine properties within fluent.

Within fluent I am iteratively varying heat flux in order to match measured inlet and outlet temperatures to my experimental data. HOWEVER, I have thousands of data points over a range of reynolds numers and measured heat fluxes.

Is it possible to arrange workbench to perform this iterative task for me? Can I write a script somewhere to compare inlet & outlet mean temperature and adjust heat flux accordingly until my values are satisfactory? Ideally this would run overnight and process hundreds of datapoints without me touching it.

ComputerGuy · December 18, 2010, 11:03

I guess I don't understand:

Your Reynolds number is very uncertain, but you know the flow is laminar?

Nevertheless -- workbench can be scripted. If I recall correctly, it uses Python, and (although I haven't tried it) v13 apparently allows interaction with Excel. Take a look here:http://www1.ansys.com/customer/conte...121/wb2_js.pdf
for scripting help.

ComputerGuy

December 15, 2010, 14:27	Iterative solution within Workbench and Fluent?	#1
WiscMS New Member Steve Sellers Join Date: Oct 2010 Posts: 2 Rep Power: 0	I wanted to see if a task I need to do is possible with these given tools. From the few basic tutorials I have followed for Workbench and Fluent, I can't tell if it is possible. My geometry and conditions are simple: I have an experiment with laminar flow through a tube with constant heat flux through the wall. I know the mean inlet and outlet temperatures. However, my reynolds number and heat flux measurements are very uncertain. (my temp measurements are good) The fluid is exotic and high temp (800K). I have UDF's to determine properties within fluent. Within fluent I am iteratively varying heat flux in order to match measured inlet and outlet temperatures to my experimental data. HOWEVER, I have thousands of data points over a range of reynolds numers and measured heat fluxes. Is it possible to arrange workbench to perform this iterative task for me? Can I write a script somewhere to compare inlet & outlet mean temperature and adjust heat flux accordingly until my values are satisfactory? Ideally this would run overnight and process hundreds of datapoints without me touching it.

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December 18, 2010, 11:03		#2
ComputerGuy Senior Member Real Name :) Join Date: Jan 2010 Location: United States Posts: 192 Rep Power: 16	I guess I don't understand: Your Reynolds number is very uncertain, but you know the flow is laminar? Nevertheless -- workbench can be scripted. If I recall correctly, it uses Python, and (although I haven't tried it) v13 apparently allows interaction with Excel. Take a look here:http://www1.ansys.com/customer/conte...121/wb2_js.pdf for scripting help. ComputerGuy