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March 3, 2021, 19:05 |
Very large ClockTime deviation
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#1 |
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Join Date: Oct 2015
Posts: 10
Rep Power: 11 |
OpenFOAM version: v1912
Solver: simpleFOAM Issue: Very large ClockTime deviation between runs Longer explanation: I am really struggling to understand why I can run the same solver a number of times and get so many different ClockTime between them. I can get on one run: Code:
Time = 1 smoothSolver: Solving for Ux, Initial residual = 1, Final residual = 0.0702223, No Iterations 1 smoothSolver: Solving for Uy, Initial residual = 0, Final residual = 0, No Iterations 0 smoothSolver: Solving for Uz, Initial residual = 0, Final residual = 0, No Iterations 0 GAMG: Solving for p, Initial residual = 1, Final residual = 0.0524647, No Iterations 5 time step continuity errors : sum local = 0.00152781, global = 6.95405e-06, cumulative = 6.95405e-06 smoothSolver: Solving for epsilon, Initial residual = 0.0515357, Final residual = 0.00306076, No Iterations 2 smoothSolver: Solving for k, Initial residual = 1, Final residual = 0.0609778, No Iterations 2 ExecutionTime = 75.81 s ClockTime = 77 s Code:
Time = 1 smoothSolver: Solving for Ux, Initial residual = 1, Final residual = 0.0702223, No Iterations 1 smoothSolver: Solving for Uy, Initial residual = 0, Final residual = 0, No Iterations 0 smoothSolver: Solving for Uz, Initial residual = 0, Final residual = 0, No Iterations 0 GAMG: Solving for p, Initial residual = 1, Final residual = 0.0524647, No Iterations 5 time step continuity errors : sum local = 0.00152781, global = 6.95405e-06, cumulative = 6.95405e-06 smoothSolver: Solving for epsilon, Initial residual = 0.0515357, Final residual = 0.00306076, No Iterations 2 smoothSolver: Solving for k, Initial residual = 1, Final residual = 0.0609778, No Iterations 2 ExecutionTime = 1.99 s ClockTime = 3 s What could be the causing this? |
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Tags |
benchmarking, clocktime, parallel cluster, simplefoam, solver control |
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