add viz

Author: yolhan83

src/2DModel/2dmodel.jl

@@ -261,4 +261,5 @@ end
 include("./variables.jl")
 include("./bc2d.jl")
 include("./Test_Cases/pressure_in.jl")
-include("./Test_Cases/convergence_test.jl")
+include("./Test_Cases/convergence_test.jl")
+include("./viz.jl")