Drying intensification by vibration: fundamental study of liquid water inside a pore

Abstract

Vibration is a promising way to intensify the drying process through heating-up due to viscous dissipation, activation of internal liquid transfer and increase of external transfer. To better assess the possible contribution of these effects, we choose a multiscale approach. This paper is focused on the pore scale, simulated by a capillary tube partially filled with water subjected to sinusoidal vibrations. We studied the displacement of water inside this tube through image analysis. This configuration mimics the moisture transfer inside the pores of a porous media during drying. The experimental device developed in this study is applicable to a wide range of configurations, such as symmetrical or asymmetrical vibrations. Keywords: drying intensification, acoustic vibration, pore scale, symmetrical and asymmetrical signals, image processing.

Numerical Comparison of Triangular and Sinusoidal External Vibration Effects on the 3D Porous Drying Process

“…Authors in [5] investigated the influence of airborne ultrasound conditions on drying. Moreover, authors in [6] studied the drying intensification by vibration. Also, authors in [7] studied the vibration effect on convection excitation in fluid and porous layers.…”

A 3‐D numerical heat and mass transfer model for simulating the vibration effects on drying process

“…have studied the drying characteristics and kinetics of Shengli lignite using four different drying methods. Recently, Colin and colleagues have explained a fundamental study of drying intensification by vibration. Certainly, vibration is a new way for the intensification of the drying process so that the several phenomena involved in this process deserve more study.…”