BUG: Corrected dimensions after commit a82a2f62

src/avalanche/friction/Voellmy/Voellmy.C

@@ -53,7 +53,7 @@ Foam::frictionModels::Voellmy::Voellmy
 :
     frictionModel(type(), frictionProperties, Us, h, p),
     mu_("mu", dimless, coeffDict_),
-    xi_("xi", dimless, coeffDict_)
+    xi_("xi", dimAcceleration, coeffDict_)
 {
     Info<< "    " << mu_ << nl
         << "    " << xi_ << nl << endl;