Use this URL to cite or link to this record in EThOS:
Title: On the mechanisms of electrohydrodynamic atomisation
Author: Hayati, Ighan
Awarding Body: University of London
Current Institution: Imperial College London
Date of Award: 1985
Availability of Full Text:
Access from EThOS:
Access from Institution:
Studies leading to understanding the mechanism of electrohydrodynamic atomisation were carried out. This work involved studying the behaviour of single drops and liquid flowing through a capillary under the effect of an electric field in a variety of conditions. Attention was given to the formation and stability of a single jet in terms of relevant parameters such as applied potential, liquid conductivity, flow rate, and capillary diameter. By inserting tracer particles into the liquid, circulation patterns inside the conical base of the jet were observed and photographed for the first time. The circulation has provided a major insight into the mechanism of electrostatic jet formation. By solving the equation of motion for creep flow in spherical coordinates, an analytical solution was obtained which predicts the motion of the liquid near the tip of the cone. From a knowledge of the jet profile and the current it carries, the normal and tangential electric fields acting on the cone were calculated and hence the variation of the normal and shear stresses on the cone surface were monitored as a function of the applied potential. The results from this study explain the division of a single jet into multiple jets.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available