Continuous conveying and mixing characteristics of high viscosity
materials under acoustic vibration excitation
Abstract
Investigating the conveying and mixing characteristics of high-viscosity
fluids in an inclined flow channel under the excitation of acoustic
frequency vibrations using computational fluid dynamics (CFD) methods.
As the intensity of the acoustic vibration excitation increases, the
free surface of the liquid transitions from generating Faraday waves to
generating disordered jets. Continued increase in the amplitude leads to
the liquid filling most of the vessel space, causing a blockage.
However, slowly increasing the amplitude alleviates the blockage
phenomenon. When high-viscosity materials are subjected to
high-intensity acoustic vibration, the flow field is dominated by shear
flow, which is accompanied by efficient stretching and folding. Changing
the amplitude or frequency alone can cause blockage, and increasing the
frequency of vibration excitation alone will not alleviate the blockage.
Instead, increasing the amplitude can generate more mixing-promoting
reflux, effectively relieving blockage while maintaining stable
conveying capacity.