|
[Sponsors] |
![]() |
![]() |
#1 |
Guest
Posts: n/a
|
Hello! I'm trying to develop a code using fractional step metod but I have little practise. I use Runge-Kutta (for convection) and Crank-Nicolson(for diffusion) time stepping. In a substep I have to update velocities with eq. such as
U(n+1)=U(n)+C(U)*dt+D(U)*dt+G(P)*dt+F*dt C ..conv,D ..diff.,G .. pressure gradient,F ext.force(I use immersed boundary method) Can I devide it in separate steps like this? U*=U(n)+C(U)*dt U**=U*+D(U*)*dt U***=U**+G(P)*dt U(no1)=U***+F*dt And what order should I use? Thanks for reply. Lada |
|
![]() |
![]() |
![]() |
#2 |
Guest
Posts: n/a
|
U*=U(n)+C(U)*dt
U**=U*+D(U*)*dt U***=U**+G(P)*dt U(no1)=U***+F*dt Sorry, I didn't expect it will write it that way. |
|
![]() |
![]() |
|
|
![]() |
||||
Thread | Thread Starter | Forum | Replies | Last Post |
MATLAB fractional step code | Darren | Main CFD Forum | 7 | September 25, 2018 14:58 |
Fractional Step, PRESTO! & LES | Paolo Lampitella | FLUENT | 2 | December 1, 2007 01:46 |
Fractional step in ALE form - possible? | Wee | Main CFD Forum | 2 | October 3, 2006 10:20 |
Implicit, fractional step method!! | Frederic Felten | Main CFD Forum | 2 | November 15, 2002 07:06 |
fractional step | nat | Main CFD Forum | 3 | September 11, 2002 17:55 |