J. Phys. IV France 125 (2005) 511-513
Thermographic observation of heat transport in solid foamsU. Netzelmann, M. Abuhamad and G. Walle
Fraunhofer-Institute for Nondestructive Testing, University, Bldg. 37, 66123 Saarbrücken, Germany
Heat transport in solid foams was studied by flash lamp heated dynamic thermography. For polyurethane foams, a movement of the peak temperature from the heated surface into the depth could be observed. This could be modelled by assuming a Beer optical absorber with non-adiabatic boundary. For large open pores, individual temperature-time curves were observed in the thermographic image. There is evidence for non-conductive heat transfer in the bulk of mixed-cell foams. In SiSiC ceramic foams, indications for sub-surface defects were detected.
© EDP Sciences 2005