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

how to stimulate unsteady flow to steady using fan

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

Reply
 
LinkBack Thread Tools Display Modes
Old   December 11, 2013, 00:28
Unhappy how to stimulate unsteady flow to steady using fan
  #1
New Member
 
Selangor
Join Date: Dec 2013
Posts: 2
Rep Power: 0
kelbros is on a distinguished road
hey guys,
I am having problem to simulate the unsteady flow to steady flow by using fan. I want the simulation of the airflows beginning on the fan just started until it reach its full velocity, it is possible to simulate,if it is, can someone guide me or help me.link for tutorial is also big help already.

Last edited by kelbros; December 11, 2013 at 15:24.
kelbros is offline   Reply With Quote

Old   December 11, 2013, 04:44
Default
  #2
Member
 
Roman Gobitz-Pfeifer
Join Date: Dec 2009
Location: Stuttgart
Posts: 76
Rep Power: 7
Wikie is on a distinguished road
Hi,

i'm not sure if I understand your question right, please correct me if I'm wrong. You have one fan in your simulation and you want to start your simulation just in the moment you turn on your fan. The aim of your simulation is to study the velocity profile caused by the fan and its increasing airflow over the time. If so, you might be able to answer the question yourself - time dependent variables (e.g. fan speed or volume flow) => transient simulation ;-)

cheers
wikie
Wikie is offline   Reply With Quote

Old   December 11, 2013, 15:17
Default
  #3
New Member
 
Selangor
Join Date: Dec 2013
Posts: 2
Rep Power: 0
kelbros is on a distinguished road
Yes Wikie, you absolutely right, sorry for my bad grammar... so do you have any idea or hint?.... i already did the fan... even the time for fan to start is set to be delay 5 second till certain amount of time. However,when i click simulation, it does not happen as i wish. really need guide for this matter.
kelbros is offline   Reply With Quote

Old   December 12, 2013, 04:38
Default
  #4
Member
 
Roman Gobitz-Pfeifer
Join Date: Dec 2009
Location: Stuttgart
Posts: 76
Rep Power: 7
Wikie is on a distinguished road
Hi,

your grammar is okay, I just want to double check if I understood everything right.
Based on your provided information I can't track down the problem. If I'm right there is a similar described at cham's website. The website seems to be down right now. The documentation of phoenics is a real pain in the neck, I'm using google to search their website (try this at google: serch_term site:www.cham.co.uk).

cheers
wikie
Wikie is offline   Reply With Quote

Old   December 12, 2013, 04:50
Default
  #5
Member
 
Roman Gobitz-Pfeifer
Join Date: Dec 2009
Location: Stuttgart
Posts: 76
Rep Power: 7
Wikie is on a distinguished road
Hi,

you can also have a look at tutorial i216 which you can load via "File->Load from Libraries". In this case two fans are switched on after a certain temperature is reached. It's done with InForm.

Cheers
wikie
Wikie is offline   Reply With Quote

Reply

Tags
airflow simulation, fan, windtunnel

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
unsteady flow, when do you use steady when do you switch to transient jpc Main CFD Forum 19 November 17, 2014 12:17
Flow recirculation around a ducted fan Jane Main CFD Forum 2 January 24, 2012 06:17
Incompressible, Unsteady Cylinder Flow startingcfd Main CFD Forum 1 March 15, 2011 02:12
How to determine whether flow is steady or unstead Maliya,Barth Main CFD Forum 7 October 7, 2006 02:26
flow simulation across a small fan jane luo Main CFD Forum 15 April 12, 2004 17:49


All times are GMT -4. The time now is 00:22.