saving and versus iteration figures from pyfoam and
 

hello
There is nothing for saving figures after compliment of plotting residual figures.also how we can plot residuals versus iteration instead of time?

Yes there is. This is the last time that I'm going to answer one of your questions that can be easily answered with "Use the --help option and read it. The answer is there". So if in the future you don't get an answer you can assume that this is it

You can't ... with PyFoam. But it can write out data files and you can then use any plotting program to plot it as you like it

ok.im engaging in remembering c++ and am doing everything altogether.so im impatient due to enclosed with a lot of things.since selecting solver to post-process.i feel uncertainty and like hear the answers from an experienced and trusted person.so i apologize you.
My problem is compressible and have shocks and expansion fans.is rhocentralfoam suitable as it is the only density based solver.is it transient?