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What is cumulative?

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Old   November 20, 2015, 08:44
Default What is cumulative?
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Dear friends,

I have a very basic doubt.

In simple foam, there is three continuity errors logged. In that, local is the max continuity error in a cell, global is the overall continuity error and what is cumulative?

I want to plot the continuity residual in my thesis and which one should I choose (global or cumulative)?

Also, one more doubt,
For me there is three pressure loops with each having their own iterations and while plotting pressure residue which one should I choose, first loop or last loop?

Code:
Time = 1613

smoothSolver:  Solving for Urelx, Initial residual = 0.000348399, Final residual = 5.89529e-11, No Iterations 6
smoothSolver:  Solving for Urely, Initial residual = 0.000141308, Final residual = 2.4223e-11, No Iterations 6
smoothSolver:  Solving for Urelz, Initial residual = 0.000256047, Final residual = 3.63635e-11, No Iterations 6
GAMG:  Solving for p, Initial residual = 0.00144709, Final residual = 1.13422e-06, No Iterations 10
GAMG:  Solving for p, Initial residual = 0.000227054, Final residual = 2.12498e-07, No Iterations 9
GAMG:  Solving for p, Initial residual = 2.1161e-05, Final residual = 1.71472e-08, No Iterations 14
time step continuity errors : sum local = 3.94777e-05, global = -1.96002e-07, cumulative = -0.018334
smoothSolver:  Solving for omega, Initial residual = 3.72909e-05, Final residual = 5.341e-12, No Iterations 7
smoothSolver:  Solving for k, Initial residual = 0.000210367, Final residual = 3.37588e-11, No Iterations 7
ExecutionTime = 12971.6 s  ClockTime = 12999 s

Time = 1614
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continuity error, openfoam, residuals


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