|
[Sponsors] |
June 16, 2009, 15:53 |
energy in sonicFoam
|
#1 |
Member
Joern Bader
Join Date: Mar 2009
Posts: 33
Rep Power: 17 |
Hi,
i posted my problem yesterday here, but i got no reply so i post it here, again. I hope someone can help cause my time is running and i have to understand the sonicFoam solver. here is my problem again: I think I understand most of sonicFoam. It's a solver with PISO loop for the compressible Navier-Stokes equations. But one think is absolutely not clear: if i set mu=0 in sonicFoam it solves the Euler Equations for a compressible, inviscid, perfect gas. (thats what i want to simulate) But there is a little difference to the standart equations. sonicFoam just looks at the inner energy e=T*Cv (just thermal energy). The Euler Equations (and also the Navier-Stokes) work with the energy e=T*Cv+1/2*mag(v)^2 (thermal energy + kinetic energy). why can the kinetic energy be ignored? And why is the the solver still consisten to the Euler-/Navier-Stokes Equations? Today i made some tests with sonicFoam and rhoSonicfoam. If i use rhoSonicfoam without kinetic energy the solution becomes wrong. And if i put kinetic energy to sonicFoam the solution becomes wrong, too. For both solvers the energy hast to be, as it is. So i think there is a kinetic energy in sonicFoam, but i can't find the term for it. pls help me, Joern ps: i post it in the "solving" forum, because for me it's a problem of consistens of a solver. |
|
September 24, 2019, 00:15 |
|
#2 |
Senior Member
Ashwani
Join Date: Sep 2013
Location: Hyderabad
Posts: 154
Rep Power: 13 |
The kinetic energy term is in the form of K=1/2*mag(v)^2.
Sorry this thread is very old but I just posted it for a quick answer for someone looking for the something same. |
|
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Total Energy -thermal energy | Herold | CFX | 8 | April 7, 2017 05:07 |
Energy imbalance | seojaho | CFX | 6 | June 21, 2016 20:35 |
SIMPLE and energy equation convergence | Fabio | Main CFD Forum | 0 | June 1, 2007 06:06 |
question about energy equation | zhou | FLUENT | 0 | February 23, 2004 23:55 |
about energy source in fluent5.4 | Devy | FLUENT | 1 | March 26, 2001 00:13 |