University Archives

Metal foams (MFs), e.g., aluminum, copper, nickel, have a web-like structure with open connected pores. The foam can have porosities exceeding 90%; and they are isotropic and exhibit uniform average geometrical properties. Thermal advantages of MFs stem from their high solid thermal conductivities, huge surface area density, and high permeability, yielding a relatively small impact on pressure drop. Additionally, the nature of foams’ internal structure causes vigorous mixing which augments convection. Experimental data sets were collected on an aluminum foam sample that was 89 mm by 62 mm by 16 mm and was subjected to various heat fluxes and cooled in room air. The aluminum foam sample had 5 pores per inch (ppi) and the porosity was 97.2%. Experimental data showed that a larger heat flux resulted in a shorter period of time to the steady-state temperature, as well as a higher steady-state temperature.