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

Smoke simulation inside an atrium

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

Reply
 
LinkBack Thread Tools Display Modes
Old   February 23, 2006, 06:32
Default Smoke simulation inside an atrium
  #1
Amr
Guest
 
Posts: n/a
Hi everyone,

I am simulating a 2D smoke event in a simplified atrium as rectangular room with two openings in cieling (one vent and one exhaust fan) and an inlet air opening on one side wall. The rest sides "edges" are modelled as wall. Smoke is modelled as "Mass and energy source" mixture of CO2 and CO without using a combustion model. Now I need guidance in the following issues:

1- As for the smoke modeling, if I wanted to model O2 depletion due to combustion, could I put an O2 sink in the same fluid zone that I put a CO, CO2 sources in? How?

2-As for Boundaries, I have set the inlet air space as Pressure inlet, the exhaust opening as Exhaust Fan and the vent opening as outlet vent. Is this correct?. Any ideas from your previous work?

3-When setting boundaries, in the exhaust fan BC, a species fraction is requested. Now, since the species fraction is one variable that I need to know after simulation, how does Fluent request its value before hand?. Is there a way to force Fluent to calculate the species fraction at Exhaust fan or Outlet vent BC?

Would appreciate your help so much. Thanks for your time.

Amr
  Reply With Quote

Old   February 24, 2006, 18:00
Default URGENT: Smoke simulation inside an atrium2
  #2
Amr
Guest
 
Posts: n/a
Hi everyone,

I am simulating a 2D smoke event in a simplified atrium as rectangular room with two openings in cieling (one vent and one exhaust fan) and an inlet air opening on one side wall. The rest sides "edges" are modelled as wall. Smoke is modelled as "Mass and energy source" mixture of CO2 and CO without using a combustion model. Now I need guidance in the following issues:

1- As for the smoke modeling, if I wanted to model O2 depletion due to combustion, could I put an O2 sink in the same fluid zone that I put a CO, CO2 sources in? How?

2-As for Boundaries, I have set the inlet air space as Pressure inlet, the exhaust opening as Exhaust Fan and the vent opening as outlet vent. Is this correct?. Any ideas from your previous work?

3-When setting boundaries, in the exhaust fan BC, a species fraction is requested. Now, since the species fraction is one variable that I need to know after simulation, how does Fluent request its value before hand?. Is there a way to force Fluent to calculate the species fraction at Exhaust fan or Outlet vent BC?

Would appreciate your help so much. Thanks for your time.

Amr

  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
simulation of piston motion inside a hydraulic cylinder mosman FLUENT 0 August 6, 2011 15:44
Resume Transient simulation HMR CFX 1 June 28, 2011 21:13
Synthetic (pulsatile) jet transient simulation aero CFX 0 November 6, 2009 01:10
smoke (fire simulation) matt Main CFD Forum 0 January 5, 2007 04:45
3-D Contaminant Dispersal Simulation Apple L S Chan Main CFD Forum 1 December 23, 1998 10:06


All times are GMT -4. The time now is 18:05.