{"doi":"10.1063/1.4963864","title":"Two-dimensional fluid dynamics in a sharply bent channel: Laminar flow, separation bubble, and vortex dynamics","abstract":"<jats:p>Understanding the hydrodynamic properties of fluid flow in a curving pipe and channel is important for controlling the flow behavior in technologies and biomechanics. The nature of the resulting flow in a bent pipe is extremely complicated because of the presence of a cross-stream secondary flow. In an attempt to disentangle this complexity, we investigate the fluid dynamics in a bent channel via the direct numerical simulation of the Navier-Stokes equation in two spatial dimensions. We exploit the absence of secondary flow from our model and systematically investigate the flow structure along the channel as a function of both the bend angle and Reynolds number of the laminar-to-turbulent regime. We numerically suggest a scaling relation between the shape of the separation bubble and the flow conductance, and construct an integrated phase diagram.</jats:p>","journal":"Physics of Fluids","year":2016,"id":26989,"datarank":1.392161603119008,"base_score":3.2188758248682006,"endowment":3.2188758248682006,"self_citation_contribution":0.48283137373023016,"citation_network_contribution":0.9093302293887778,"self_endowment_contribution":0.48283137373023016,"citer_contribution":0.9093302293887778,"corpus_percentile":null,"corpus_rank":null,"citation_count":24,"citer_count":24,"citers_with_citation_signal":20,"citers_with_endowment":20,"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":154878,"name":"Koji Fukudome","orcid":null,"position":1,"is_corresponding":false},{"id":154879,"name":"Hirofumi Wada","orcid":null,"position":2,"is_corresponding":false},{"id":154877,"name":"Daichi Matsumoto","orcid":null,"position":0,"is_corresponding":false}],"reference_count":0,"raw_metadata":{"has_enrichment":true,"base_score":3.2188758248682006,"endowment":3.2188758248682006,"datacite_reuse_total":0,"file_count":0,"downloads":0,"views":0,"has_version_chain":false,"is_dataset":false,"is_oa":false,"pmid":"24523987","pmcid":null,"openalex_id":"https://openalex.org/W2527788675","authors":[],"funders":[{"funder_name":"Japan Society for the Promotion of Science","grant_id":"16H00815","title":null},{"funder_name":"Ministry of Education, Culture, Sports, Science, and Technology","grant_id":"15H03712","title":null}],"total_grants":2,"fwci":0.6172,"citation_percentile":0.702486,"influential_citations":1,"citation_trend":[{"year":2018,"count":1},{"year":2019,"count":1},{"year":2020,"count":3},{"year":2021,"count":3},{"year":2022,"count":3},{"year":2023,"count":3},{"year":2024,"count":4},{"year":2025,"count":3},{"year":2026,"count":3}],"oa_status":"closed","license":null,"oa_locations":[{"url":"https://pubs.aip.org/aip/pof/article-pdf/doi/10.1063/1.4963864/15853616/103602_1_online.pdf","host_type":"publisher"},{"url":"https://doi.org/10.1063/1.4963864","host_type":"journal"}],"fields_of_study":["Fluid Dynamics and Vibration Analysis","Fluid Dynamics and Turbulent Flows","Lattice Boltzmann Simulation Studies","Physics","Engineering"],"mesh_terms":[],"keywords":["Laminar flow","Physics","Hele-Shaw flow","Open-channel flow","Mechanics","Turbulence","Reynolds number","Pipe flow","Vortex","Particle-laden flows","Flow (mathematics)","Bubble","Bent molecular geometry","Fluid dynamics","Two-phase flow","Navier–Stokes equations","Classical mechanics","Materials science"],"sdg_mappings":[],"linked_datasets":[],"clinical_trials":[],"software_tools":[],"database_accessions":[],"source":"live","citation_network_status":"fetched"},"created_at":"2026-06-08T16:15:58.521740Z","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":[]}