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-   -   Unsteady Bernoulli equations (http://www.cfd-online.com/Forums/main/107732-unsteady-bernoulli-equations.html)

megaweber October 5, 2012 04:38

Unsteady Bernoulli equations
 
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 October 15, 2012 04:03

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.

leflix October 17, 2012 16:43

Quote:

Originally Posted by megaweber (Post 385036)
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 !! :D
What are you talking about ? :confused:

leflix October 17, 2012 16:52

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 :D


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