R.W. Lockhart’s scientific contributions

... To achieve this objective, this article has compiled condensation pressure drop data in PHE condensers from seventeen sources [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18], which was assessed with widely cited research [19][20][21][22] and evaluated with independent data [15,23,24]. Similarly, evaporation pressure drop data was compiled from twenty-four sources and assessed with published research [33,[49][50][51] while being evaluated with independent data [52]. Only a few phase-change two-phase multiplier / LO predictive correlations [12, 19-22, 49, 51] in PHEs are currently available, while the rest are only for two-phase flows [33,34,50] without phase-change. ...

Reference:

New Two-Phase Multiplier Model for Phase- Change Flows in Plate Heat Exchangers New Two-Phase Multiplier Model for Phase-Change Flows in Plate Heat Exchangers

... As for the two-phase flow, the Lockhart-Martinelli model considers the flow nonlinearity. This model is originally established to describe the two-phase flow in pipes [36]. It introduced two important parameters: the multiplier of water phase Φ w and the multiplier of gas phase Φ g , in order to assess the flow resistivity induced by two-phase interactions. ...

Reference:

Experimental Investigation on the Hydraulic Characteristics of the Two-Phase Flow in the Intersecting Rock Fractures