CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > ANSYS > FLUENT

Fluent journal - setting ideal gas

Register Blogs Community New Posts Updated Threads Search

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   April 24, 2006, 09:02
Default Fluent journal - setting ideal gas
  #1
Franky
Guest
 
Posts: n/a
Hi ! I'm trying to set up my material with the journal. I wrote "define materials change air

air

ideal-gas

But Fluent wants me to fill in other parameters (Cp, sound speed...) and I want them to be set as default values. Do I have to set them up anyway ?

After, I want to set the opearting conditions, and if I stop at "ideal gas", "define operating-conditions" is understood as a Cp method !! (is there any command to simulate the "return key" or something equivalent?)

I hope my explanation was clear enough and you'll be able to help me !
  Reply With Quote

Old   April 24, 2006, 09:11
Default Re: Fluent journal - setting ideal gas
  #2
Gernot Lukesch
Guest
 
Posts: n/a
Try : ()
  Reply With Quote

Old   April 24, 2006, 12:17
Default Re: Fluent journal - setting ideal gas
  #3
Ralf Schmidt
Guest
 
Posts: n/a
as far as I know, Fluent takes every "return" in the journal file as a "real return".
  Reply With Quote

Old   April 24, 2006, 12:22
Default Re: Fluent journal - setting ideal gas
  #4
Francky
Guest
 
Posts: n/a
I tryied like this :
"define materials change air (air) (ideal-gas)" but Fluent returns this :

define materials change air (air)Invalid material.
(ideal-gas)Invalid material.

material name [air] air is a fluid
change Density? [no] change Cp (Specific Heat)? [no] change Thermal Conductivity? [no] change Viscosity? [no] change Molecular Weight? [no] change L-J Characteristic Length? [no] change L-J Energy Parameter? [no] change Thermal Expansion Coefficient? [no] change Degrees of Freedom? [no] change Speed of Sound? [no]
  Reply With Quote

Old   April 25, 2006, 03:18
Default Re: Fluent journal - setting ideal gas
  #5
Gernot Lukesch
Guest
 
Posts: n/a
I´m sorry, the () command was the return for the execute commands and not for the journal-files. I tried some things it worked with :

define materials change air air y ideal-gas n n n n n n n n n

I hope thats what you are looking for
  Reply With Quote

Old   May 2, 2006, 05:06
Default Re: Fluent journal - setting ideal gas
  #6
Frankky
Guest
 
Posts: n/a
I tryied "define materials change air air y ideal-gas n n n n n n n n n" but it does not work :

define materials change air air air is a fluid
y
Density
methods: (constant ideal-gas incompressible-ideal-gas boussinesq piecewise-linear piecewise-polynomial polynomial user-defined)
ideal-gas no data required.

n n n n n n n
Error: CAR: invalid argument [1]: wrong type [not a pair]
Error Object: p
n invalid command [n]
  Reply With Quote

Old   May 2, 2006, 05:21
Default Re: Fluent journal - setting ideal gas
  #7
Ralf Schmidt
Guest
 
Posts: n/a
try following:

//define/materials/change-create

Air_ideal_gas

y

ideal-gas

(use only ONE return for each line) and so on and so on... Fluent will ask you all the options to set... viscosity, cp, sound.vel,...

if you want to change it, use y and then type in the option or value, if not, type in n

Hope, it helps Ralf

  Reply With Quote

Reply


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 Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Fluent jobs through pbs ibnkureshi FLUENT 5 June 9, 2011 14:43
Fluent 12 Journal File Problem Krish FLUENT 2 July 16, 2010 07:10
Setting initial amount of ideal gas David FLUENT 0 November 2, 2007 09:35
question about ideal gas thermal flow yong Main CFD Forum 0 January 7, 2006 00:58
Gas pressure question Dan Moskal Main CFD Forum 0 October 24, 2002 23:02


All times are GMT -4. The time now is 07:42.