Numerical modelling of novel heat exchanger materials
A numerical study investigates a new heat exchanger material existing of a fine metallic structure, e.g. a metallic foam. The surface of this material carbon is covered with carbon nano fibers (CNF’s). These fibers influence the fluid flow, and enlarge the heat exchanging surface. Preliminary experimental research has shown that the presence of these CNF’s can enhance heat transfer by 50%. This depends very much on the CNF density and on the structure of the CNF itself. This numerical study gives directions in optimizing this new material.