Electrodynamics

Most natural and manmade aerosols carry charges, and their behavior is strongly affected by their charge.  In this section the consequences of charges on dynamic of aerosols are discussed.  A brief review of electrodynamics is first presented. The Maxell equations governing electrodynamics are listed in Table 1.

Table 1.  Electrodynamics equations.

Constitutive equations for free space are given as:

			(1)
			(2)

Ohm’s Law is given by

(3)

In these equations:

D = Electric Displacement                      c = Speed of Light
B = Magnetic Induction                           = Dielectric Constant
E = Electric Field                                     = Permeability
H = Magnetic Field                                 = Conductivity
J = Current                                             = Charge Density

Note that 1 electronic unit of charge =  Statcoulombs =  Coulombs (MKS).  A conversion table for different physical quantities are given in Table 2.

Table 2. Conversion Table