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why courant number goes so high?

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Old   February 5, 2013, 13:50
Default why courant number goes so high?
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in sonicFoam courant number increases very high while its restricted to .1 in controlDict?
application     sonicFoam;

startFrom       latestTime;

startTime       0;

stopAt          endTime;

endTime         0.020708089;

deltaT          5.6e-9;

writeControl    adjustableRunTime;

writeInterval   .000001;

purgeWrite      0;

writeFormat     binary;

writePrecision  10;

writeCompression on;

timeFormat      general;

timePrecision   6;

runTimeModifiable true;

adjustTimeStep  yes;

maxCo           0.1;

maxDeltaT       .0001;

libs ( "" "" ) ;
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