A Numerical Study on Gas-Water Two-Phase Flow in Gas Production System from Methane Hydrate Resources

A self-priming centrifugal pump can be used in various areas such as agricultural irrigation, urban greening, and building water-supply. In order to simulate the gas-water two-phase flow in the self-priming process of a self-priming centrifugal pump, the unsteady numerical calculation of a typical self-priming centrifugal pump was performed using the ANSYS Computational Fluid X (ANSYS CFX) software. It was found that the whole self-priming process of a self-priming pump can be divided into three stages: the initial self-priming stage, the middle self-priming stage, and the final self-priming stage. Moreover, the self-priming time of the initial and final self-priming stages accounts for a small percentage of the whole self-priming process, while the middle self-priming stage is the main stage in the self-priming process and further determines the length of the self-priming time.

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Numerical study on two-phase flow characteristics of heavy oil-water ring transport boundary layer

Journal of Petroleum Science and Engineering ◽

10.1016/j.petrol.2020.107173 ◽

2020 ◽

Vol 191 ◽

pp. 107173 ◽

Cited By ~ 1

Author(s):

Jiaqiang Jing ◽

Mingjun Du ◽

Ran Yin ◽

Yahui Wang ◽

Yu Teng

Keyword(s):

Boundary Layer ◽

Heavy Oil ◽

Two Phase Flow ◽

Numerical Study ◽

Flow Characteristics ◽

Phase Flow ◽

Two Phase ◽

Oil Water ◽

Water Ring

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Numerical Study of Bubble Rising and Coalescence Characteristics under Flow Pulsation Based on Particle Method

Science and Technology of Nuclear Installations ◽

10.1155/2019/2045751 ◽

2019 ◽

Vol 2019 ◽

pp. 1-13

Author(s):

Ronghua Chen ◽

Minghao Zhang ◽

Kailun Guo ◽

Dawei Zhao ◽

Wenxi Tian ◽

...

Keyword(s):

Flow Rate ◽

Two Phase Flow ◽

Flow Instability ◽

Numerical Study ◽

Phase Flow ◽

Flow Pulsation ◽

Two Phase ◽

Inlet Flow ◽

Inlet Flow Rate ◽

Bubble Rising

Two-phase flow instability may occur in nuclear reactor systems, which is often accompanied by periodic fluctuation in fluid flow rate. In this study, bubble rising and coalescence characteristics under inlet flow pulsation condition are analyzed based on the MPS-MAFL method. To begin with, the single bubble rising behavior under flow pulsation condition was simulated. The simulation results show that the bubble shape and rising velocity fluctuate periodically as same as the inlet flow rate. Additionally, the bubble pairs’ coalescence behavior under flow pulsation condition was simulated and compared with static condition results. It is found that the coalescence time of bubble pairs slightly increased under the pulsation condition, and then the bubbles will continue to pulsate with almost the same period as the inlet flow rate after coalescence. In view of these facts, this study could offer theory support and method basis to a better understanding of the two-phase flow configuration under flow pulsation condition.

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