INFLUENCE OF HIGH-FREQUENCY ACOUSTIC WAVES ON THE FLOW OF A LIQUID THROUGH POROUS MATERIAL: EXPERIMENTAL AND THEORETICAL INVESTIGATION

摘要

In this paper the effect of ultrasound on flow through porous media has been investigated both experimentally and theoretically. Ultrasounds (20 and 40 kHz) have been proved to increase the flow rate through porous media. Two effects have been found of relevance. Decrease in viscosity due to dissipation of acoustic waves and acoustic streaming. The two effects have been modeled and those models compared with experimental data.