A theoretical solution of the Lockhart and Martinelli flow model for calculating two-phase flow pressure drop and hold-up

Abstract This paper presents a theoretical method of predicting the pressure drop and hold up in stratified and wavy two-phase flow. The theory is based on the flow model of Lockhart and Martinelli, but the theoretical solution agrees much better, compared with the generalized empirical solution developed by Lockhart and Martinelli for all flow regimes, with measurements made under these restricted conditions. A detailed calculation procedure for the theoretically developed pressure drop analysis is presented at the end of this paper.