Clear ghost values in a vector

diff --git a/examples/step-87/step-87.cc b/examples/step-87/step-87.cc
index aeee8d067cb922790890b5a84ff521b29b46cfae..5d51f55fc93baa51c6e3df76018d5e7521588d1d 100644 (file)
--- a/examples/step-87/step-87.cc
+++ b/examples/step-87/step-87.cc
@@ -831,6 +831,7 @@ namespace Step87
               VectorTools::point_values<dim>(rpe,
                                              dof_handler_background,
                                              velocity);
+            velocity.zero_out_ghost_values();
 
             for (unsigned int i = 0, c = 0;
                  i < immersed_support_points.locally_owned_size() / dim;