Entropy Field Function in CCM?

 Register Blogs Members List Search Today's Posts Mark Forums Read

August 15, 2011, 08:39
Entropy Field Function in CCM?
#1
Senior Member

Join Date: Dec 2010
Posts: 135
Rep Power: 6
Hi guys

I want to setup a field function which calculates me the entropy...

I know the basic equation is this:

s21 = cp*ln(T2/T1) - R*ln(p2/p1)

There is a more fundamental equation for calculation the Entropy in a "numerical" way, it is the sum of contributions due to viscous effects and thermal effects. sges = sviscous + sthermal

The equation is in the attachement

How can i implement this function as field function in CCM? I am new to this software, so i need a bit help...

greets and thanks

P.S.: Using a model with constant density...not ideal gas...
Attached Images
 EntropyNumerisch.jpg (16.1 KB, 19 views)

 August 16, 2011, 03:23 #2 Senior Member   Join Date: Dec 2010 Posts: 135 Rep Power: 6 Nobody has got an idea? Generally, i just want to visualize the losses over a blade or some planes.....thougth the entropy is the right way to do this. Is this also with the Rothalpy possible?

 August 20, 2011, 22:30 #3 New Member   zhangrong Join Date: Aug 2011 Posts: 4 Rep Power: 5 Under the node of Tools>Field Functions, you can creating your own field function by right-clicking this node and selecting to create a new one. But note that, STAR CCM has its regulation to write a field function, so please consult the User's guide to resolve your problem. Hope that help.

 August 22, 2011, 05:15 #4 Senior Member   Join Date: Dec 2010 Posts: 135 Rep Power: 6 Hi, thanks for your reply, but my question was not how to setup a field function in general. I was looking for a "numerical" formulation of the entropy which is calculated in every point. I want to see the Entropy for example over the pressure side of a airfoil,...

 Thread Tools Display Modes Linear Mode

 Posting Rules You may not post new threads You may not post replies You may not post attachments You may not edit your posts BB code is On Smilies are On [IMG] code is On HTML code is OffTrackbacks are On Pingbacks are On Refbacks are On Forum Rules

 Similar Threads Thread Thread Starter Forum Replies Last Post sailor FLUENT 0 April 13, 2011 03:45 Pleb STAR-CCM+ 2 February 17, 2011 13:16 feng_w OpenFOAM Installation 1 January 25, 2009 07:59 George Gardner FLUENT 0 October 12, 2007 08:00 sushii FLUENT 2 October 11, 2007 01:04

All times are GMT -4. The time now is 07:20.