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changed (old) linearised Cu coeff to momentum transfer coefficient

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This commit is contained in:
andy
2009-06-05 16:39:21 +01:00
parent 981e624811
commit 8a2f65940c
2 changed files with 5 additions and 7 deletions
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5
src/lagrangian/intermediate/submodels/Kinematic/DragModel/DragModel/DragModel.C
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@ -64,12 +64,11 @@ const Foam::dictionary& Foam::DragModel<CloudType>::dict() const
template<class CloudType> template<class CloudType>
Foam::scalar Foam::DragModel<CloudType>::Cu Foam::scalar Foam::DragModel<CloudType>::ptc
( (
const vector& Ur, const vector& Ur,
const scalar d, const scalar d,
const scalar rhoc, const scalar rhoc,
const scalar rhop,
const scalar mu const scalar mu
) const ) const
{ {
@ -79,7 +78,7 @@ Foam::scalar Foam::DragModel<CloudType>::Cu
const scalar Cd = this->Cd(Re); const scalar Cd = this->Cd(Re);
return 3.0*Cd*rhoc*magUr/(4.0*d*rhop); return Cd*rhoc*magUr/8.0;
} }

7
src/lagrangian/intermediate/submodels/Kinematic/DragModel/DragModel/DragModel.H
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@ -120,14 +120,13 @@ public:
//- Return drag coefficient //- Return drag coefficient
virtual scalar Cd(const scalar Re) const = 0; virtual scalar Cd(const scalar Re) const = 0;
//- Return linearised coefficient for velocity equation //- Return momentum transfer coefficient
// Drag force per unit particle mass = Cu(U - Up) // Drag force per unit particle surface area = ptc(U - Up)
scalar Cu scalar ptc
( (
const vector& Ur, const vector& Ur,
const scalar d, const scalar d,
const scalar rhoc, const scalar rhoc,
const scalar rhop,
const scalar mu const scalar mu
) const; ) const;
}; };