Monitoring of the mass transfer in porous media by coupling technologies of imaging
Résumé
The mass transfer in porous media is commonly monitored through the evolution of the sample weight. This method is robust but requiresa mechanical link between the instrument and the sample, andcannot reveal the complexity of internal and exchange phenomena. In this paper, two complementary imaging technologies are used to investigate the coupling between internal and external transfer. On the one hand, X-rayimagingcan be used to assess the moisture content profile inside the porous medium. On the other hand, thanks to the coupling between heat and mass transfer, infrared radiationsallow the external mass transfer to be investigated through the surface temperature.Thesemethodswill be used in ongoing works for studying the efficiency of the transfer, with or without intensification methods, such as vibrations.