Lockhart–Martinelli Parameter

The Lockhart–Martinelli parameter ($\chi$) is a dimensionless number used in internal two-phase flow calculations.Lockhart, R.W., Martinelli, R.C.; Chem. Eng. Prog., Vol. 45. 1949, pp. 39–48 It expresses the liquid fraction of a flowing fluid. Its main application is in two-phase pressure drop and boiling/condensing heat transfer calculations.

It is defined as:

: $\chi = \frac \sqrt,$

where

*$m_\ell$ is the liquid phase mass flowrate;
*$m_g$ is the gas phase mass flowrate;
*$\rho_g$ is the gas density;
*$\rho_\ell$ is the liquid density.

See also

* Wet gas

References

{{DEFAULTSORT:Lockhart-Martinelli Parameter
Dimensionless numbers