From 2b0e4dc97a4df2c074e8c37290da5e35493dbe54 Mon Sep 17 00:00:00 2001
From: mattijs <mattijs>
Date: Mon, 16 Jun 2025 16:57:48 +0100
Subject: [PATCH] ENH: potentialFoam: allow swirl bc. See #3211

Bypasses the constraint override. Contentious -
does field algebra or boundary constraints take
priority.
---
 applications/solvers/basic/potentialFoam/createFields.H | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/applications/solvers/basic/potentialFoam/createFields.H b/applications/solvers/basic/potentialFoam/createFields.H
index 352458d00c..fcf3537bda 100644
--- a/applications/solvers/basic/potentialFoam/createFields.H
+++ b/applications/solvers/basic/potentialFoam/createFields.H
@@ -13,7 +13,14 @@ volVectorField U
 );
 
 // Initialise the velocity internal field to zero
-U = dimensionedVector(U.dimensions(), Zero);
+// Note: explicitly bypass evaluation of contraint patch overrides
+//       (e.g. swirlFanVelocity might lookup phi,rho)
+//U = dimensionedVector(U.dimensions(), Zero);
+{
+    const dimensionedVector dt(U.dimensions(), Zero);
+    U.internalFieldRef() = dt;
+    U.boundaryFieldRef() = dt.value();
+}
 
 surfaceScalarField phi
 (