(M.M.C.G Warmoeskerken and P.H. de Mol van Otterloo)
One of the main problems in wet textile processes is formed by the relatively slow transport processes in the porous structure of the textile substrate. Due to the complex geometry of textile materials these processes are mainly diffusion controlled. It is believed that ultrasonic waves can enhance these processes. The current project is aimed at understanding the mechanisms of ultrasound waves and their effect on the enhancement of the transport processes by inducing convective diffusion in the pores of textile materials. The mechanism of ultrasound waves is being investigated in terms of acoustic cavitation phenomena and acoustic streaming. The theoretical analysis is supported by model experiments.