ScholarLens Back to search
2011•Unpublished venueRequires access

Flow characteristics of gas-liquid two-phase flow in small vertical rectangular channel

Hongbo Wang

Open publisher page 1 citations

Abstract

Based on high speed camera,nitrogen-water two-phase vertical upward flow characteristics was studied in a small rectangular channel with hydraulic diameter of 1.15 mm.Four typical flow pattern images(bubbly flow,slug flow,churn flow and annular flow) were observed.According to non-overlapping characteristics among bubbles in the small rectangular channel,four typical flow patterns images were enhanced by using digital image processing techniques.After detecting bubble's edge and filling fully,gas void fraction was obtained by the proposed models.Two-phase flow was distinguished by the liquid Reynolds number as laminar region,transition region and turbulent region,and a modified Chisholm equation was proposed,The results showed that the modified Chisholm correlation equation could better predict pressure drop in this study.

About this research paper

What this paper is about

Based on high speed camera,nitrogen-water two-phase vertical upward flow characteristics was studied in a small rectangular channel with hydraulic diameter of 1.15 mm.Four typical flow pattern images(bubbly flow,slug flow,churn flow and annular flow) were observed.According to non-overlapping characteristics among bubbles in the small rectangular channel,four typical flow patterns images were enhanced by using digital image processing techniques.After detecting bubble's edge and filling fully,gas void fraction was obtained by the proposed models.Two-phase flow was distinguished by the liquid Reynolds number as laminar region,transition region and turbulent region,and a modified Chisholm equation was proposed,The results showed that the modified Chisholm correlation equation could better predict pressure drop in this study.

Why it matters

OpenAlex reports 1 citations for this work. Citation counts describe recorded attention and do not establish research quality.

Key contribution

A contribution statement is not available in the OpenAlex record.

Method / approach

Method details are not available in the OpenAlex metadata.

Main findings

Findings are not separately available in the OpenAlex metadata.

Limitations

Limitations are not available in the OpenAlex metadata.

Applications

Application details are not available in the OpenAlex metadata.

Available abstract

Based on high speed camera,nitrogen-water two-phase vertical upward flow characteristics was studied in a small rectangular channel with hydraulic diameter of 1.15 mm.Four typical flow pattern images(bubbly flow,slug flow,churn flow and annular flow) were observed.According to non-overlapping characteristics among bubbles in the small rectangular channel,four typical flow patterns images were enhanced by using digital image processing techniques.After detecting bubble's edge and filling fully,gas void fraction was obtained by the proposed models.Two-phase flow was distinguished by the liquid Reynolds number as laminar region,transition region and turbulent region,and a modified Chisholm equation was proposed,The results showed that the modified Chisholm correlation equation could better predict pressure drop in this study.

Key concepts: Laminar flow, Mechanics, Open-channel flow, Slug flow, Turbulence, Two-phase flow, Pressure drop, Flow (mathematics)

Related papers

Related paper 1Related paper 2Related paper 3
Back to paper searchBrowse research topicsOriginal source
Flow characteristics of gas-liquid two-phase flow in small vertical rectangular channel — Research Paper | ScholarLens