The Interface heat flux result shows the amount of heat flowing from the current part into the previous part (i.e., from overmolding into original molding, or into a part insert). Negative values indicate heat flowing into the current molding.
Only mesh faces which form the boundary between the current part and the previous part (or insert) are shown in this result. Blank areas indicate where the solver could not match mesh faces on one or the other part, and may indicate holes in the mesh interface.
This result indicates how much heat is flowing between parts during insert or overmolding processes. Heat flow that is too high may cause remelting in the first part or insert. Heat flow that is uneven may cause stresses or warping in the first part.