STUDY OF THREE-PHASE AIR-BRINE-SALT COUNTERFLOW IN AN INCLINED PIPE
type: CreativeWork
description: Gas-liquid-solid counterflow (GLSCF) in inclined pipes occurs in various industrial processes, including oil and gas production and desalination systems. This thesis presents an experimental investigation of GLSCF in a 2-inch pipe inclined at 30°, utilizing air, saturated brine, and salt particles. A wide range of gas and liquid superficial velocities were tested. High-speed and standard-speed video recordings, pressure, and fluid level measurements were used to analyze flow regimes, bubble characteristics (length, velocity, depth, frequency), void fraction, and solid particle velocity. This study introduces a novel flow-regime map combining concurrent and countercurrent flow regimes. Empirical equations were developed to predict average bubble length, depth, velocity, and cross-sectional void fraction. Additionally, a new flow phenomenon, stationary tri-axial vortices, was identified and characterized. This research provides valuable data and empirical correlations for GLSCF, with implications for industrial applications and future development of numerical models.
abstract: Gas-liquid-solid counterflow (GLSCF) in inclined pipes occurs in various industrial processes, including oil and gas production and desalination systems. This thesis presents an experimental investigation of GLSCF in a 2-inch pipe inclined at 30°, utilizing air, saturated brine, and salt particles. A wide range of gas and liquid superficial velocities were tested. High-speed and standard-speed video recordings, pressure, and fluid level measurements were used to analyze flow regimes, bubble characteristics (length, velocity, depth, frequency), void fraction, and solid particle velocity. This study introduces a novel flow-regime map combining concurrent and countercurrent flow regimes. Empirical equations were developed to predict average bubble length, depth, velocity, and cross-sectional void fraction. Additionally, a new flow phenomenon, stationary tri-axial vortices, was identified and characterized. This research provides valuable data and empirical correlations for GLSCF, with implications for industrial applications and future development of numerical models.
author: NISIM SHUSHAN
keywords: inclined pipe flow, stationary triaxial vortices, countercurrent flow, concurrent flow, gas-liquid-solid flow, multiphase flow
license: https://scholarbank.nus.edu.sg/bitstreams/9005355c-3931-409f-962b-8171a6f0922b/download
date published: 2024-01-28
date modified: 2026-07-24T03:31:51Z
provider: National University of Singapore
publisher: Networked Digital Library of Theses and Dissertations
type: WebPage
source organization: National University of Singapore