diff --git a/openfoam/artha/0.org/U b/openfoam/artha/0.org/U
index e8843b1..d8e9345 100644
--- a/openfoam/artha/0.org/U
+++ b/openfoam/artha/0.org/U
@@ -59,6 +59,7 @@ boundaryField
     outlet
     {
         type            waveAbsorption2DVelocity;
+				value           uniform (0 0 0);
     }
 }