{"cited_by_count":20626,"description":"This cluster of papers focuses on the thermal separation phenomenon and energy efficiency in vortex tubes, particularly the Ranque-Hilsch effect. It includes experimental investigations, CFD analysis, and optimization studies related to nozzle design and exergy analysis. The research also explores the application of vortex tubes in energy efficiency and heat transfer processes.","display_name":"Ranque-Hilsch vortex tube","domain_id":"3","external_ids":{"openalex":"https://openalex.org/T13640","wikipedia":"https://en.wikipedia.org/wiki/Vortex_tube"},"field_id":"22","id":"T13640","keywords":[{"display_name":"vortex tube","id":"vortex-tube","score":0.5615,"url":"https://openalex.org/keywords/vortex-tube"},{"display_name":"energy separation","id":"energy-separation","score":0.5617,"url":"https://openalex.org/keywords/energy-separation"},{"display_name":"temperature separation","id":"temperature-separation","score":0.8541,"url":"https://openalex.org/keywords/temperature-separation"},{"display_name":"cold mass fraction","id":"cold-mass-fraction","score":0.9577,"url":"https://openalex.org/keywords/cold-mass-fraction"},{"display_name":"counter-flow vortex tube","id":"counter-flow-vortex-tube","score":0.9775,"url":"https://openalex.org/keywords/counter-flow-vortex-tube"},{"display_name":"vortex tube performance","id":"vortex-tube-performance","score":0.9681,"url":"https://openalex.org/keywords/vortex-tube-performance"},{"display_name":"cold fraction","id":"cold-fraction","score":0.8021,"url":"https://openalex.org/keywords/cold-fraction"},{"display_name":"vortex tube cooling","id":"vortex-tube-cooling","score":0.2762,"url":"https://openalex.org/keywords/vortex-tube-cooling"},{"display_name":"spot cooling","id":"spot-cooling","score":0.2069,"url":"https://openalex.org/keywords/spot-cooling"},{"display_name":"total temperature distribution","id":"total-temperature-distribution","score":0.2639,"url":"https://openalex.org/keywords/total-temperature-distribution"},{"display_name":"negative pressure region","id":"negative-pressure-region","score":0.2,"url":"https://openalex.org/keywords/negative-pressure-region"}],"legacy_keywords":["Vortex Tube","Thermal Separation","CFD Analysis","Experimental Investigation","Energy Efficiency","Ranque-Hilsch Effect","Nozzle Design","Exergy Analysis","Counterflow Vortex Tube","Heat Transfer"],"openalex_id":"https://openalex.org/T13640","source_created_date":"2024-01-23T15:27:19","source_updated_date":"2026-10-17T03:02:00","subfield_id":"2210","url":"/topics/T13640","works_api_url":"https://api.openalex.org/works?filter=topics.id:T13640","works_count":2589,"label":"Ranque-Hilsch vortex tube","provider":"openalex","revision":"34bb08dfce880533","taxonomy_revision":"f050b5d4780b1289","title":"Ranque-Hilsch vortex tube","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"38359797241905777","address_version":"morton4x16-v1","coordinates":[3,22,2210,13640],"answer_status":"Directory metadata; local answer requires separate source review","truth_status":"Subject descriptor, not a factual answer or a demonstrated knowledge gap","reviewed_answer":null}