# dimension [0 0 -0 0 0 0 0]?

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 April 9, 2014, 23:49 dimension [0 0 -0 0 0 0 0]? #1 Senior Member   Dongyue Li Join Date: Jun 2012 Location: Torino, Italy Posts: 752 Rep Power: 10 Sponsored Links Hi guys, I have a volScalarField, Code: `volScalarField epsilonD(pow(epsilon/pow(d,2),1/3));` you can see that epsilon's dimension is [0 2 -3 0 0 0 0] and d's dimension is [0 1 0 0 0 0 0], So epsilonD's dimension should be [0 0 -1 0 0 0 0] But openfoam tell me its dimention is [0 0 -0 0 0 0 0]? Any ideas?

 April 9, 2014, 23:56 #2 Senior Member   Dongyue Li Join Date: Jun 2012 Location: Torino, Italy Posts: 752 Rep Power: 10 volScalarField epsilonD(pow(epsilonF,1/3)); This is very simple, epsilonF's dimension is [0 0 -3 0 0 0 0] , but epsilonD's dimention is [0 0 -0 0 0 0 0]

 April 10, 2014, 03:16 #3 Senior Member   Dongyue Li Join Date: Jun 2012 Location: Torino, Italy Posts: 752 Rep Power: 10 Solved. Code: `volScalarField epsilonD(pow(epsilonF,1.0/3.0));` I checked it out in dimensionSet.C and I got this piece of code: Code: ```Foam::dimensionSet Foam::cbrt(const dimensionSet& ds) { return pow(ds, 1.0/3.0); } .......................... Foam::dimensionSet Foam::pow(const dimensionSet& ds, const scalar p) { dimensionSet dimPow ( ds[dimensionSet::MASS]*p, ds[dimensionSet::LENGTH]*p, ds[dimensionSet::TIME]*p, ds[dimensionSet::TEMPERATURE]*p, ds[dimensionSet::MOLES]*p, ds[dimensionSet::CURRENT]*p, ds[dimensionSet::LUMINOUS_INTENSITY]*p ); return dimPow; }``` I dont know if its a bug. But its solved right now. Any comments are welcomed.

 April 10, 2014, 03:38 #4 Member   xuhe-openfoam Join Date: Aug 2013 Location: DaLian，china Posts: 82 Rep Power: 5 int a=1; int b=3; float c=a/b; when a and b both are int, c=0 best wishes!

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