Umudike Journal of Engineering and Technology

Michael Okpara University of Agriculture, Umudike


CFD MODEL ANALYSIS OF THE EFFECT OF THE PHASE VELOCITY ON THE PRESSURE OF A THREE-PHASE DOWNWARD FLOW IN A PIPE
Ntunde D. I.
Mechanical Engineering Department Michael Okpara University of Agriculture Umudike, Abia State.



ABSTRACT

The simulation of a three-phase downward flow model in a pipe was performed using ANSYS CFD 18.2 to analyse the effect of the phase velocity on the pressure of the flow process. The flow system was modelled at 25°c for the simultaneous downward flow of CO2 gas, water and kerosene in a vertical pipe. The input phase velocities of the phases were simulated for 16secs: for the CO2 gas phase found between 0.452 and 32.868m/s and the liquid phases of water and oil velocities between 0.008889 and 13.0734m/s. The result showed that the increase in the water and the gas phase velocities were directly proportional to the total pressure of the multiphase flow process and the reverse case for the kerosene. Further analysis showed that the static pressure of the flow process was due to the phase distribution of each phase in the test section pipe; where the kerosene and the gas phases experienced the highest and lowest static pressure of 8.65e+02pa and 2.68e+02pa. This result revealed that the effect of the phase velocity on the total pressure drop of the multiphase flow process was significantly influenced by the interfacial relationship force between the water and gas phases. These findings generally provided a comprehensive understanding of the flow process to meet its industrial application demands of emerging technologies.


Keywords: Three-phase, Phase velocity, Interfacial pressure, Flow process, Downward flow


https://doi.org/10.33922/j.ujet_v6i1_11
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Published
Monday, June 01, 2020
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Vol. 6 No. 1, June 2020
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