Electrostatic characteristics of a charged turbulent free jet
Abstract
The properties of a charge density fluid which is generated in charged, turbulent, free jet flow are studied. The dynamic conservation equation of charge is solved analytically for the mean charge density field in a flow by assuming a simple velocity field, and numerically by using a more accurate velocity field. The characteristics of the charged jet can be described by a given dimensionless length ratio. Based on the electrostatic properties of a charged jet, three conductivity ranges are identified. In the highconductivity range, the charged region is confined only to the near field. In the other extreme, there is a lowconductivity range in which the charge density field in the flow behaves analogously to other conservative scalar field properties in a turbulent jet with similar rates of decay and spread. The intermediate conductivity range falls between these two limits, with charge dispersion controlled by migration and diffusion.
 Publication:

International Journal of Heat and Mass Transfer
 Pub Date:
 August 1985
 Bibcode:
 1985IJHMT..28.1539A
 Keywords:

 Charge Transfer;
 Electrical Resistivity;
 Electrostatic Charge;
 Fluid Jets;
 Free Jets;
 Turbulent Jets;
 Bessel Functions;
 Conservation Equations;
 Finite Difference Theory;
 Reynolds Number;
 Schmidt Number;
 Fluid Mechanics and Heat Transfer