# 13.7.1.3: Gravity Pressure Loss

Gravity was discussed in Chapter 4 and is

\[

\left.\dfrac{dP}{dx} \right|_{g} = g\,\rho_m\, \sin\theta

\label{phase:eq:Pgravity} \tag{38}

\]

The density change during the flow can be represented as a function of density. The density in equation (38) is the density without the "movement'' (the "static'' density).

### Contributors

Dr. Genick Bar-Meir. Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or later or Potto license.