CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > CD-adapco

Area and mass average values on a section

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

Reply
 
LinkBack Thread Tools Display Modes
Old   January 24, 2007, 15:53
Default Area and mass average values on a section
  #1
Peter N
Guest
 
Posts: n/a
Hi,

No-one else seems to be able to help me and it seems that some of the people on this forum know more than anyone else about star.

Here goes;

I am doing an analysis on a mixed flow turbine using Star CD 3.24. I have done a single vane steady state analysis and would now like to evaluate the mass flow averaged temperature at the inlet and outlet to the turbine wheel (not the mesh inlet and outlets) and the area averaged pressures at the same places.

I do have .usr files containing the inlet and outlet coordinates and vertex (or possibly cell) numbers but cannot find a way of using these.

I hope that description of my problem makes sense.

If someone could help me with this I would be eternally thankful

Thanks

Pete

  Reply With Quote

Old   January 24, 2007, 17:59
Default Re: Area and mass average values on a section
  #2
julien caradonna
Guest
 
Posts: n/a
If you want to evaluate an averaged scalar for a cell set: Select the cell set and a coordinate system with the z-axis normal to the section (20) and write:

*set sref 20 load .pst psys sref oper getc volu 1 oper getc sw 2 oper getc T 3 rela or oper getc Ptot 3 oper mult 1 2 5 oper mult 3 5 6 summa cset *get svu rtot 5 *get svup rtot 6 *set pt2 svup / svu
  Reply With Quote

Old   February 4, 2007, 07:32
Default Re: Area and mass average values on a section
  #3
Peter N
Guest
 
Posts: n/a
Thanks Julien, I was intending to do it a little differently at the beginning (i.e. averaging on a plane) but your way may just be the best way about it.

Thanks again
  Reply With Quote

Old   February 4, 2007, 08:12
Default Re: Area and mass average values on a section
  #4
Balduin Bankerotti
Guest
 
Posts: n/a
Something like this might do the job to calculate the mass flow averaged total pressure in a section defined by spoi and snorm:


getc all ptot
oper,getc,dens,5
oper,mult,4,5,6
oper swap 4 6
inte cset
*get, ZAEHLER, tavs
oper swap 4 5
*get, NENNER, tavs
*set, ptot, ZAEHLER / NENNER
  Reply With Quote

Reply

Thread Tools
Display Modes

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 Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
mass & area average henry CFX 7 April 20, 2014 23:35
Diffference between mass weighted average and Area giogio FLUENT 4 September 25, 2012 01:36
Facet, Area and Mass Average in Fluent Tushar FLUENT 0 February 6, 2009 00:55
Facet, Area and Mass Average in Fluent Tushar Main CFD Forum 0 February 4, 2009 05:37
Area average of pressure on a section Radhika CD-adapco 4 April 4, 2007 18:05


All times are GMT -4. The time now is 09:23.