BUG: Fix sign in Lee model. Fixes #1934.

OpenQBMM @ 70d327b2

-Subproject commit cee0fdd438c3e90403e90abfb23ef6ead3ab171d
+Subproject commit 70d327b25ed66e4a7bead8c046bda4f87225415d

external-solver @ 302f2518

-Subproject commit f3dd3aac02feac29ccb62fbb147c757b896ea3db
+Subproject commit 302f2518284be5a3c796091357a67fb1ae0250cd

src/phaseSystemModels/multiphaseInter/phasesSystem/massTransferModels/Lee/Lee.C

@@ -159,7 +159,7 @@ Foam::meltingEvaporationModels::Lee<Thermo, OtherThermo>::KSu
         {
             return
             (
-                coeff*pos(Tactivate_ - refValue)
+                -coeff*pos(Tactivate_ - refValue)
             );
         }
     }