4 frictionFactor.primitiveFieldRef() =
5 mag(2*9.81*
sqr(manningField.primitiveField())/
dimensionedSymmTensor sqr(const dimensionedVector &dv)
dimensioned< typename typeOfMag< Type >::type > mag(const dimensioned< Type > &dt)
dimensionedScalar cbrt(const dimensionedScalar &ds)