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ENH: Better handling of injection rates less than one parcel per timestep.

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This commit is contained in:
graham
2010-12-07 16:03:58 +00:00
parent 837bb5847b
commit 4bd6aba569
1 changed files with 19 additions and 1 deletions
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20
src/lagrangian/intermediate/submodels/Kinematic/InjectionModel/PatchInjection/PatchInjection.C
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@ -38,7 +38,24 @@ Foam::label Foam::PatchInjection<CloudType>::parcelsToInject
{
if ((time0 >= 0.0) && (time0 < duration_))
{
return round(fraction_*(time1 - time0)*parcelsPerSecond_);
scalar nParcels =fraction_*(time1 - time0)*parcelsPerSecond_;
cachedRandom& rnd = this->owner().rndGen();
label nParcelsToInject = floor(nParcels);
// Inject an additional parcel with a probability based on the
// remainder after the floor function
if
(
nParcelsToInject > 0
&& (nParcels - scalar(nParcelsToInject) > rnd.position(0.0, 1.0))
)
{
++nParcelsToInject;
}
return nParcelsToInject;
}
else
{
@ -173,6 +190,7 @@ void Foam::PatchInjection<CloudType>::setPositionAndCell
if (cellOwners_.size() > 0)
{
cachedRandom& rnd = this->owner().rndGen();
label cellI = rnd.position<label>(0, cellOwners_.size() - 1);
cellOwner = cellOwners_[cellI];