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

Unsteady Bernoulli equations

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

Reply
 
LinkBack Thread Tools Display Modes
Old   October 5, 2012, 04:38
Default Unsteady Bernoulli equations
  #1
New Member
 
Daniel Weber
Join Date: Nov 2009
Posts: 4
Rep Power: 7
megaweber is on a distinguished road
Hi,

i have a problem understanding when to use the unsteady bernoulli equations.

As far as I understood, there is a time dependent potential that needs to be computed in every time step, but this potential will only vary when using different boundary conditions for different time steps, am I right?

Does it only make sense to use the unsteady bernoulli equations if there are unsteady boundary conditions? If there are steady boundary conditions, will this problem reduce to solving the potential equations?

Any hints are appreciated,
Daniel
megaweber is offline   Reply With Quote

Old   October 15, 2012, 04:03
Default
  #2
New Member
 
Daniel Weber
Join Date: Nov 2009
Posts: 4
Rep Power: 7
megaweber is on a distinguished road
I would be happy, if anybody could provide a pointer to some additional information for the unsteady bernoulli equation, even if it is not a direct answer to my question.
megaweber is offline   Reply With Quote

Old   October 17, 2012, 16:43
Default
  #3
Senior Member
 
Join Date: Aug 2011
Posts: 251
Rep Power: 6
leflix is on a distinguished road
Quote:
Originally Posted by megaweber View Post
Hi,

i have a problem understanding when to use the unsteady bernoulli equations.

Daniel
I use to teach fuid mechanic since 15 years, and I have never heard about unsteady Bernoulli equation !!
What are you talking about ?
leflix is offline   Reply With Quote

Old   October 17, 2012, 16:52
Default
  #4
Senior Member
 
Join Date: Aug 2011
Posts: 251
Rep Power: 6
leflix is on a distinguished road
check this:
http://web.mit.edu/2.016/www/handout...ion_050921.pdf

Fine ! to tonight I will go to bed less silly than waking up this morning
leflix is offline   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
Guide: Writing Equations in LaTeX on the CFD Online Forums pete Site Help, Feedback & Discussions 20 June 16, 2015 13:52
Oscillating Cylinder in Parallel Flow: Analytical Solution startingcfd Main CFD Forum 7 March 23, 2012 06:49
Error with the unsteady flamelet Model Christoph_84 FLUENT 0 February 25, 2010 12:06
unsteady 1-D euler equations in a nozzle Luca Main CFD Forum 1 November 30, 2008 15:13
unsteady Bernoulli equation and wagner function. Afungchui Main CFD Forum 0 March 14, 2005 12:50


All times are GMT -4. The time now is 03:45.