rhoCentralFoam Solver
Dear Foamers,
I am unable to understand the code given in the RhoCentralFoam.C i mean the working procedure, but in the user guide given about pisoFoam and IcoFoam. Where should I find the information about the code like " reconstruct(rho)" thanks in advance. 
There is a paper on the solver:
Christopher J. Greenshields, Henry G. Weller, Luca Gasparini and Jason M. Reese, Implementation of semidiscrete, nonstaggered central schemes in a colocated, polyhedral, ﬁnite volume framework, for highspeed viscous ﬂows, INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN FLUIDS, Int. J. Numer. Meth. Fluids 2010; 63:1–21 For the definition of reconstruct: ~/OpenFOAM/OpenFOAM2.0.x/src/finiteVolume/finiteVolume/fvc/ I hope this helps. 
Dear Alberto Passalacqua thank you very much for your kind information
Regards, 
Hi alberto,
I want to know that rhoCentralFoam is a steady solver or a transient solver?Thank you 
It is a transient solver. You can check that easily by looking at the tutorials.

hi
There are two types of solvers in openFoam for compressible flows. For example RhoSimpleFoam and RhoCentralFoam. The solution methods (algorithm) are different for the above two solvers. How to choose the solver. And what are all the parameters we have to consider while selecting the solvers.
Regards, 
Quote:
The rhoCentralFoam solver uses a densitybased approach with central schemes, and it solves the unsteady equations. The choice of the solver depends on the type of flow you have:  Steady/unsteady?  High Mach number (density based approach) / low Mach number (pressurebased approach)? Best, 
hi
hi alberto,
Thanks for reply, How to find the which solver is the best for different range of Mach Numbers, and is there any limitation for any solver for prescribed Mach Mumber, How to find that. How the results are varies if i use pressure based solvers and density based solvers if i use same problem. what are all the factors we have to consider. Regards, 
Quote:
If you have a specific problem in mind, you should provide details about it, so that the question is specific. 
Quote:
I am using rhoCentralFoam for my transsonic laminar problem. May be I am wrong, but the one of the main feature of rhoCentralFoam I think is using of fully conservative scheme, so the main conservative laws (for example, for energy) are always preserved. I tried sonicFoam and rhoSimpleFoam and found that there were problems with temperature distributions (such problems were discussed on the forum). As for rhoPimpleFoam I cannot get it worked for my case =( So I recommend use of rhoCentralFoam for the problems with Mach number > ~1 
Hi
what does the lines for momentum solving in this solver mean? Code:
//  Solve momentum Code:
fvm::ddt(rho, U)  fvc::ddt(rho, U) 
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