# macros for pressure drop

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 August 11, 2005, 06:45 macros for pressure drop #1 Dr C.Bhasker Guest   Posts: n/a Can some body help me to write a macro in Star-Cd to compute pressure drop. Where exactly macros are located and how to access these macros in pro-star post processing? Dr C.Bhasker

 August 11, 2005, 07:51 Re: macros for pressure drop #2 William Blake Guest   Posts: n/a http://www.adapco-online.com/adapco_...t/drpost9.html http://www.adapco-online.com/adapco_...sh4/index.html This is sort of consulting work and if you are willing to pay it should be no problem to do this for you.

 August 11, 2005, 13:20 Re: macros for pressure drop #3 Tom Guest   Posts: n/a Instead of using a macro, I wrote one as a panel. The pressure drop is measured between two different cell types. I just used cset,newset,zone and chose the regions. The pressure drop then is calculated using: oper getc ptot 1 oper getc volu 2 oper mult 1 2 3 cset,newset,type,75 *get prdt1 rtot 3 *get volu1 rtot 2 *set pin prdt1 / volu1 cset,newset,type,76 *get prdt2 rtot 3 *get volu2 rtot 2 *set pout prdt2 / volu2 *set DP pout - pin I hope this helps. Tom

 August 24, 2005, 14:20 Re: macros for pressure drop #4 Fred Guest   Posts: n/a Man, I don't know how you guys can stand using Star-CD! This is ugly. In CFX, you just write a simple, readable expression: Pressure Drop = areaAve(Pressure)@Outlet - areaAve(Pressure)@Inlet You can also use a mass flow average, arithmetic average, etc. -Fred

 September 7, 2005, 09:40 Re: macros for pressure drop #5 Arthur Guest   Posts: n/a I like your website ! nice design and informativ ! keep up the good work
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April 9, 2012, 12:24
CFX Pressure Drop Along A Streamline Path
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Mike Jenkins
Join Date: Apr 2009
Location: Kansas City
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Your post was from a LONG time ago but I just found it extremely usefull.
Do you have any tips on graphing the pressure drop through a streamline in CFX?
The only thing I have found is to create a polyline using points and then graph pressure along it?

Quote:
 Originally Posted by Fred ;169591 Man, I don't know how you guys can stand using Star-CD! This is ugly. In CFX, you just write a simple, readable expression: Pressure Drop = areaAve(Pressure)@Outlet - areaAve(Pressure)@Inlet You can also use a mass flow average, arithmetic average, etc. -Fred