Flow Patterns Transition in Vertical and Upwardly Inclined Two-Phase Flow

Xie Tianzhou; Chen Bingde; Xu Jianjun; Bao Wei

doi:10.13832/j.jnpe.2015.04.0004

Volume 36 Issue 4

Feb. 2025

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Xie Tianzhou, Chen Bingde, Xu Jianjun, Bao Wei. Flow Patterns Transition in Vertical and Upwardly Inclined Two-Phase Flow[J]. Nuclear Power Engineering, 2015, 36(4): 4-7. doi: 10.13832/j.jnpe.2015.04.0004

Citation:

Xie Tianzhou, Chen Bingde, Xu Jianjun, Bao Wei. Flow Patterns Transition in Vertical and Upwardly Inclined Two-Phase Flow[J]. Nuclear Power Engineering, 2015, 36(4): 4-7. doi: 10.13832/j.jnpe.2015.04.0004

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Flow Patterns Transition in Vertical and Upwardly Inclined Two-Phase Flow

doi: 10.13832/j.jnpe.2015.04.0004

CNNC Key Laboratory on Nuclear Reactor Thermo Hydraulics Technology, Nuclear Power Institute of China, Chengdu, 610041, China

Received Date: 2014-12-22
Rev Recd Date: 2015-06-23

Available Online: 2025-02-15

Abstract

Abstract

An experimental study on the flow patterns in vertical and upwardly inclined two-phase flow is carried out using de-ionized water and air as the working media. Five major flow regimes, i.e, dispersed bubble, bubble, slug, churn and annular flow, are recognized. By mechanism analysis, flow pattern transitions from dispersed bubble to bubble/slug, bubble to slug, slug to churn, and churn to annular, are derived and agree well with the experimental data.
- Two-phase flow,
- Inclined pipe,
- Flow patterns,
- Transitions