NUMERICAL MODEL OF ULTRASONIC AGGLOMERATION OF SUBMICRON PARTICLES IN RESONANT GAS GAPS

Theoretical substantiation of the physical principle of increasing the efficiency of ultrasonic agglomeration of submicron particles is proposed, which is based on the creation of resonant conditions for forming vortex flows in gas gaps. The generated vortex flows lead to a local increase in the concentration of particles, which increases the frequency of collisions and, consequently, the efficiency of agglomeration. A numerical model of this process is proposed. The results of calculations carried out on the basis of the numerical model made it possible to ascertain that the efficiency of agglomeration when creating vibrations by a flexurally oscillating radiator (a collection of vortex flows is formed) is more than four times higher than in the case of creating vibrations using a piston radiator (one little-eff ective vortex flow is generated).
   
Author:  V. N. Khmelyov, R. N. Golykh, V. A. Nesterov, A. V. Shalunov
Keywords:  ultrasound, gas cleaning, coagulation, agglomeration, acoustic fi eld, fractional effi ciency, resonant gap, vortex flow
Page:  255