{"doi":"10.3390/s141222431","title":"Measurement of Gas-Liquid Two-Phase Flow in Micro-Pipes by a Capacitance Sensor","abstract":"<jats:p>A capacitance measurement system is developed for the measurement of gas-liquid two-phase flow in glass micro-pipes with inner diameters of 3.96, 2.65 and 1.56 mm, respectively. As a typical flow regime in a micro-pipe two-phase flow system, slug flow is chosen for this investigation. A capacitance sensor is designed and a high-resolution and  high-speed capacitance measurement circuit is used to measure the small capacitance signals based on the differential sampling method. The performance and feasibility of the capacitance method are investigated and discussed. The capacitance signal is analyzed, which can reflect the voidage variation of two-phase flow. The gas slug velocity is determined through a  cross-correlation technique using two identical capacitance sensors. The simulation and experimental results show that the presented capacitance measurement system is successful. Research work also verifies that the capacitance sensor is an effective method for the measurement of gas liquid two-phase flow parameters in micro-pipes.</jats:p>","journal":"Sensors","year":2014,"id":688724,"datarank":0.4566783656585135,"base_score":3.044522437723423,"endowment":3.044522437723423,"self_citation_contribution":0.4566783656585135,"citation_network_contribution":0.0,"self_endowment_contribution":0.4566783656585135,"citer_contribution":0.0,"corpus_percentile":null,"corpus_rank":null,"citation_count":20,"citer_count":0,"citers_with_citation_signal":0,"citers_with_endowment":0,"datacite_reuse_total":0,"is_dataset":false,"is_dataset_confidence":null,"is_data_producer":false,"deposit_databanks":null,"is_oa":false,"file_count":0,"downloads":0,"has_version_chain":false,"published_date":null,"fair_score":null,"fair_percentile":null,"algorithm_id":"datarank_citation_only_1hop_v6","ranking_scope":"data_only","authors":[{"id":211220,"name":"Huajun Li","orcid":null,"position":1,"is_corresponding":false},{"id":1799279,"name":"Zhiyao Huang","orcid":null,"position":2,"is_corresponding":false},{"id":1743203,"name":"Baoliang Wang","orcid":null,"position":3,"is_corresponding":false},{"id":281425,"name":"Haiqing Li","orcid":"0000-0001-5583-2240","position":4,"is_corresponding":false},{"id":1743202,"name":"Haifeng Ji","orcid":null,"position":0,"is_corresponding":false}],"reference_count":0,"raw_metadata":{"has_enrichment":true,"resolved":true,"title":"Measurement of Gas-Liquid Two-Phase Flow in Micro-Pipes by a Capacitance Sensor","abstract":"<jats:p>A capacitance measurement system is developed for the measurement of gas-liquid two-phase flow in glass micro-pipes with inner diameters of 3.96, 2.65 and 1.56 mm, respectively. As a typical flow regime in a micro-pipe two-phase flow system, slug flow is chosen for this investigation. A capacitance sensor is designed and a high-resolution and  high-speed capacitance measurement circuit is used to measure the small capacitance signals based on the differential sampling method. The performance and feasibility of the capacitance method are investigated and discussed. The capacitance signal is analyzed, which can reflect the voidage variation of two-phase flow. The gas slug velocity is determined through a  cross-correlation technique using two identical capacitance sensors. The simulation and experimental results show that the presented capacitance measurement system is successful. Research work also verifies that the capacitance sensor is an effective method for the measurement of gas liquid two-phase flow parameters in micro-pipes.</jats:p>","is_dataset_classified":null,"base_score":3.044522437723423,"endowment":3.044522437723423,"datacite_reuse_total":0,"file_count":0,"downloads":0,"views":0,"has_version_chain":false,"is_dataset":false,"is_oa":false,"pmid":"25587879","pmcid":"PMC4299021","openalex_id":"https://openalex.org/W2061393616","authors":[],"funders":[],"total_grants":0,"fwci":0.4928,"citation_percentile":0.65082232,"influential_citations":0,"citation_trend":[{"year":2016,"count":3},{"year":2018,"count":4},{"year":2019,"count":1},{"year":2020,"count":1},{"year":2021,"count":4},{"year":2022,"count":2},{"year":2024,"count":3},{"year":2025,"count":1},{"year":2026,"count":1}],"oa_status":"gold","license":"cc-by","oa_locations":[{"url":"https://www.mdpi.com/1424-8220/14/12/22431/pdf?version=1417007965","host_type":"journal"},{"url":"https://www.mdpi.com/1424-8220/14/12/22431/pdf?version=1417007965","host_type":"publisher"},{"url":"https://www.mdpi.com/1424-8220/14/12/22431/pdf","host_type":"publisher"},{"url":"https://doi.org/10.3390/s141222431","host_type":"journal"},{"url":"https://pubmed.ncbi.nlm.nih.gov/25587879","host_type":"repository"},{"url":"http://europepmc.org/articles/PMC4299021","host_type":"repository"},{"url":"https://www.ncbi.nlm.nih.gov/pmc/articles/4299021","host_type":"repository"},{"url":"https://doaj.org/article/bd3f1c677c83402d8a263f798fd87b07","host_type":"repository"},{"url":"http://dx.doi.org/10.3390/s141222431","host_type":"repository"},{"url":"https://europepmc.org/articles/PMC4299021","host_type":"Europe_PMC"},{"url":"https://europepmc.org/articles/PMC4299021?pdf=render","host_type":"Europe_PMC"}],"fields_of_study":["Microfluidic and Capillary Electrophoresis Applications","Electrical and Bioimpedance Tomography","Microfluidic and Bio-sensing Technologies"],"mesh_terms":[],"keywords":["Capacitance","Capacitance probe","Differential capacitance","Two-phase flow","Flow (mathematics)","Materials science","Electrical capacitance tomography","Flow measurement","SIGNAL (programming language)","Slug flow","Phase (matter)","Capacitive sensing","Parasitic capacitance","Acoustics","Electrical engineering","Mechanics","Chemistry","Engineering","Physics","Computer science","Electrode"],"sdg_mappings":[{"sdg_number":0,"sdg_label":"Affordable and clean energy"}],"linked_datasets":[],"clinical_trials":[],"software_tools":[],"database_accessions":[],"source":"live","citation_network_status":"fetched"},"created_at":"2026-08-19T18:45:52.649275Z","pmid":null,"pmcid":null,"fwci":null,"citation_percentile":null,"influential_citations":0,"oa_status":null,"license":null,"views":0,"total_file_size_bytes":0,"version_count":0,"fair_f":null,"fair_a":null,"fair_i":null,"fair_r":null,"fair_zscore":null,"fair_rationale":null,"fair_model":null,"fair_agent_version":null,"fair_fulltext_source":null,"fair_has_llm":null,"fair_computed_at":null,"clinical_trials":[],"software_tools":[],"db_accessions":[],"linked_datasets":[],"topics":[]}