what do global and cumulative terms in continuity refer to exactly?
at results there are 3 types of residuals of continuity equation.whats the definition of them and difference?if cumulative and or global be negative whats wrong in the problem?

For the solvers of incompressible fluid, take a look at the
src/finiteVolume/cfdTools/incompressible/continuityErrs.H: Code:
volScalarField contErr(fvc::div(phi)); continuity error is whether the magnitude of divergence is taken or not. The "local" error is a measure of the continuity of each cell and the "global" error represents the continuity in the whole computational domain. If the global error converges to zero, I think the negative value is of no matter. I have no idea about the importance of considering the cumulative error. Fumiya 
thanks fumiya
I cant grasp how the total continuity is calculated.my case is compressible. What does mean cumulative continuity error? Any hint is accepted here! 
All times are GMT 4. The time now is 05:44. 