$\begin{array}{l}\displaystyle \rho = \frac{m}{V}\end{array}$

where

$\begin{array}{l}m\end{array}$

$\begin{array}{l}V\end{array}$

The total fluid density of multiphase fluid is given by following equation:

(1)	$\begin{array}{l}\displaystyle \rho = \sum_\alpha s_\alpha \, \rho_\alpha\end{array}$

where

$\begin{array}{l}\rho_\alpha\end{array}$

Density of $\begin{array}{l}\alpha\end{array}$ -phase

$\begin{array}{l}s_\alpha\end{array}$

volumetric share of $\begin{array}{l}\alpha\end{array}$ -phase

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:See also