טכניון מכון טכנולוגי לישראל
הטכניון מכון טכנולוגי לישראל - בית הספר ללימודי מוסמכים  
Ph.D Thesis
Ph.D StudentKojevnikov Svetlana
SubjectMechanisms of Interactions between Charged Drops in
Collection Processes under the Action of
Force Field
DepartmentDepartment of Civil and Environmental Engineering
Supervisors Mr. Yoram Zimmels (Deceased)
Professor Yehuda Agnon


Abstract

The aim of this work is to determine the governing mechanisms of interaction between charged and uncharged aerosols and drops in collection processes under the action of an electric force field, and study their effects on the collection efficiency. The mechanisms, which include hydrodynamic and electric interactions, depend on the physical characteristics of the collected and collecting drops.

In this work, theoretical models and computational procedures were developed in order to simulate aerosol trajectories in arrays of collecting drops. The models, which involve complicated patterns of forces and positions in the system, were used to study the interactions between the drops and aerosols in the presence and absence of an external electric field.

 This work includes a number of subjects that describe the dynamic behavior of finite arrays of collected and collecting drops.

The results of the work show, that interaction in systems of dispersed drops in air or generally charged bodies, changes to a great extent the mechanisms whereby droplets/aerosols are captured. The results demonstrate deficiencies and restrictions of existing models, which apply in most cases to collection of a single droplet/particle by a single collecting body, drop or collector. This research is intended to broaden the knowledge about interaction between moving droplet arrays, and the mechanisms leading to the capture of one type by the other.

A basic aspect of the research is to help understand the electrical interactions between drops in a force field and ways to control them in order to improve the efficiencies of separation systems.