Modelling the two-phase flow of propane in a capillary tube: Determination of the two-phase viscosity based on detailed experiments

Dynamic, Semi-Empirical Modelling and Experimental Validation of Pressure Drop in Capillary Tubes

“…For a systematic investigation on this pressure drop in the capillary, a dynamic model is formulated within MATLAB/SIMSCAPE assuming an adiabatic and non-isenthalpic state change. Moreover, our previous work [1] has shown a hysteresis effect during the capillary operation at different subcooled conditions at constant mass flow and pressure at the capillary inlet, which we could confirm in our own test-rig [2]. This is due to the wetted surface of the capillary, which reduces the roughness of the capillary.…”