Commit 868d5866 authored by Andrew Heather's avatar Andrew Heather
Browse files

ENH: Use reference instead of copy

parent 6148d8c4
......@@ -118,7 +118,7 @@ void Foam::particleForces::cacheFields(const bool store)
{
if (store && pressureGradient_)
{
const volVectorField U = mesh_.lookupObject<volVectorField>(UName_);
const volVectorField& U = mesh_.lookupObject<volVectorField>(UName_);
gradUPtr_ = fvc::grad(U).ptr();
}
else
......
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