{"id":{"repo_id":"nus","oai_identifier":"oai:scholarbank.nus.edu.sg:10635/309583"},"canonical_url":"https://search.dev.ndltd.org/etd/nus/oai:scholarbank.nus.edu.sg:10635/309583","repository":{"repo_id":"nus","name":"National University of Singapore","base_url":"https://scholarbank.nus.edu.sg/oai/request"},"display":{"title":"STUDY OF THREE-PHASE AIR-BRINE-SALT COUNTERFLOW IN AN INCLINED PIPE","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.","abstract_html":"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_has_math":false,"creators":["NISIM SHUSHAN"],"institution":null,"degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2024,"date_issued":"2024-01-28","date_published":"2024-01-28","updated_at":"2026-07-24T03:31:51Z","subjects":["inclined pipe flow","stationary triaxial vortices","countercurrent flow","concurrent flow","gas-liquid-solid flow","multiphase flow"],"languages":[],"rights":[],"rights_urls":["https://scholarbank.nus.edu.sg/bitstreams/9005355c-3931-409f-962b-8171a6f0922b/download"],"identifier_entries":[]},"links":{"outbound_url":null,"outbound_label":null,"outbound_source":null},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:creator","label":"Author","values":["NISIM SHUSHAN"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.issued","label":"Date","values":["2024-01-28"]},{"key":"dc:relation.isreferencedby","label":"Dc Relation Isreferencedby","values":["https://scholarbank.nus.edu.sg/handle/10635/309583"]},{"key":"dc:type","label":"Dc Type","values":["Thesis"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["inclined pipe flow","stationary triaxial vortices","countercurrent flow","concurrent flow","gas-liquid-solid flow","multiphase flow"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:rights","label":"Dc Rights","values":["https://scholarbank.nus.edu.sg/bitstreams/9005355c-3931-409f-962b-8171a6f0922b/download"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["https://scholarbank.nus.edu.sg/bitstreams/b3a4c3bc-b415-4692-a037-18c1e64241e2/download"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["Gas-liquid-solid counterflow (GLSCF) in inclined pipes occurs in various industrial processes, including oil and gas production and desalination systems. 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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. 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