problem writing field function

vernon · July 16, 2017, 10:28

Hello everyone, I am having some problem using star CCM+ for my model. I was trying to use a specific function for my fully-developed velocity inlet. As my model is a pipe, the profile function is V(r)=Vmax*[1-(r/R)^2].
I am not sure how to compile user defined function in star ccm+. Thanks in advance for the assistance.

ashokac7 · July 18, 2017, 01:28

One way to due is by creating a table having i, j, k velocities and position data and applying it as a boundary condition. But you may have to take lot effort for creating a table.

Sent from my Redmi Note 3 using CFD Online Forum mobile app

FluentStarter · July 18, 2017, 02:07

Shouldn't V(x,y)=Vmax*[1-(sqrt(Position(0)^2+Position(1)^2)/R)^2] do it?
With position corresponding to the location in your x and y coordinate if we suppose your inlet lies in the x-y plane?

vernon · August 1, 2017, 08:00

Thank you very much for your help man.

I have already covered this problem following your advice.

July 16, 2017, 10:28	problem writing field function	#1
vernon New Member vernon Join Date: Jul 2017 Posts: 2 Rep Power: 0	Hello everyone, I am having some problem using star CCM+ for my model. I was trying to use a specific function for my fully-developed velocity inlet. As my model is a pipe, the profile function is V(r)=Vmax*[1-(r/R)^2]. I am not sure how to compile user defined function in star ccm+. Thanks in advance for the assistance.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Problem with Field Function	gmoehl	STAR-CCM+	2	August 18, 2012 04:17
[blockMesh] BlockMesh FOAM warning	gaottino	OpenFOAM Meshing & Mesh Conversion	7	July 19, 2010 14:11
Compilation errors in ThirdPartymallochoard	feng_w	OpenFOAM Installation	1	January 25, 2009 06:59
Problem with rhoSimpleFoam	matteo_gautero	OpenFOAM Running, Solving & CFD	0	February 28, 2008 06:51
Droplet Evaporation	Christian	Main CFD Forum	2	February 27, 2007 06:27

July 18, 2017, 01:28		#2
ashokac7 Senior Member Ashok Chaudhari Join Date: Aug 2016 Location: Pune, India Posts: 260 Rep Power: 10	One way to due is by creating a table having i, j, k velocities and position data and applying it as a boundary condition. But you may have to take lot effort for creating a table. Sent from my Redmi Note 3 using CFD Online Forum mobile app

July 18, 2017, 02:07		#3
FluentStarter Member Join Date: Apr 2014 Location: N/A Posts: 47 Rep Power: 12	Shouldn't V(x,y)=Vmax*[1-(sqrt(Position(0)^2+Position(1)^2)/R)^2] do it? With position corresponding to the location in your x and y coordinate if we suppose your inlet lies in the x-y plane?

August 1, 2017, 08:00		#4
vernon New Member vernon Join Date: Jul 2017 Posts: 2 Rep Power: 0	Thank you very much for your help man. I have already covered this problem following your advice.