next up previous
Next: Continuity Equation Up: Fundamentals Previous: General Orthogonal Coordinates

Fluids and Nonmagnetic Plasmas

Liquids, gases and plasmas may often be treated as a continuous media with a density, $\rho$, pressure, $p$, and velocity, ${\bf v}$, all functions of position and time.
\rho \hbox{ is the mass per unit volume } kg m^{-3} \qquad {M\over L^{3}}.
\end{displaymath} (2.1)

p \hbox{ is the pressure force per unit area } pascals \qquad
{M\over L T^{2}}.
\end{displaymath} (2.2)

The pressure is the force per unit area that is exerted on a surface by the fluid or plasma.


Prof. Alan Hood