| Abstrakt: |
Information technologies for numerical simulation of physical processes are of great importance in natural sciences and technologies. A critical role for solving environmental problems that have become more acute in the course of intensive development of technologies is played by the process of cleaning industrial exhaust gases from dispersed suspensions. One of the most effective methods of gas purification is ultrasonic coagulation with nonlinear physical effects (vortex acoustic flows are the most intense effects of the 2nd order). The previously proposed model of ultrasonic coagulation, taking into account vortex acoustic flows, does not consider potential forces. They can arise in a real physical process due to various factors - gravitational attraction, the Archimedes force, as well as the force arising from momentum transfer phenomena, can have both potential and vortex components. It follows from the Navier-Stokes equations with an equivalent body force that the vortex component is able to cause an annular motion of the medium even under zero Dirichlet boundary conditions for the velocity or stream function (depending on the form of the equations), and the potential component is only capable of creating a pressure gradient. The presence of a pressure gradient can cause additional movement of particles, since each particle has a finite size. The authors proposed a model that made it possible to take into account the effect of potential forces on the transition of particles from vortex to vortex and, consequently, on the efficiency of coagulation. The results obtained indicate that the presence of potential forces satisfying the condition of the negative integral of the potential energy Laplacian contributes to additional compaction of particles and, consequently, to an additional increase in the efficiency of coagulation. [ABSTRACT FROM AUTHOR] |
