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

units problem

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

Reply
 
LinkBack Thread Tools Display Modes
Old   October 30, 2007, 10:39
Default units problem
  #1
hass
Guest
 
Posts: n/a
hello i am doing diesel combustion problem. i want to know when i use thermal Nox and Mauss soot model in which units i geet my results i.e NOx and SOot values
  Reply With Quote

Old   October 30, 2007, 12:28
Default Re: units problem
  #2
usker
Guest
 
Posts: n/a
mass fraction
  Reply With Quote

Old   October 30, 2007, 14:31
Default Re: units problem
  #3
hass
Guest
 
Posts: n/a
thanks but can you tell me how to change units in to g/kWh
  Reply With Quote

Old   October 31, 2007, 10:12
Default Re: units problem
  #4
dong
Guest
 
Posts: n/a
Get the mass flow of your emissions at the outlet. This should be in your info file. If not use the 'operate' commands to get a value. Divide by the heat input into your system.
  Reply With Quote

Old   November 1, 2007, 10:58
Default Re: units problem
  #5
Andrea
Guest
 
Posts: n/a
q_SOOT (or q_NOx) in [g/(kWh)] if I'm right it's:
SOOT_conc*cyl_mass*60^2*10^6*number_of_cyl/(pme*cyl_max_volume)
where pme is in Pa (Star writes in Pa) and cyl_max_vol is in m^3


  Reply With Quote

Old   November 5, 2007, 10:38
Default Re: units problem
  #6
hass
Guest
 
Posts: n/a
Hi Andrea Can u tell me whats pme in equatoin you gave
  Reply With Quote

Old   November 5, 2007, 20:59
Default Re: units problem
  #7
usker
Guest
 
Posts: n/a
mean effective pressure
  Reply With Quote

Old   November 6, 2007, 04:19
Default Re: units problem
  #8
hass
Guest
 
Posts: n/a
Thanks
  Reply With Quote

Old   November 8, 2007, 12:40
Default Re: units problem
  #9
Andrea
Guest
 
Posts: n/a
yes, and note that cylinder mass in that formula it's in kg as written out by Star
  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
Units? Skander FLUENT 1 February 5, 2007 10:10
Problem With Scalar Units Carlos V. FLUENT 0 May 2, 2006 11:59
What's the units in UDF? Erica FLUENT 3 March 3, 2005 19:40
What's the units? ocy FLUENT 3 February 23, 2005 22:40
Units of P CFD guy Phoenics 1 December 29, 2004 06:35


All times are GMT -4. The time now is 17:40.