A two-fluid model for refrigerant flow through adiabatic capillary tubes

dc.contributorUniversidade Estadual Paulista (UNESP)
dc.creatorSeixlack, Andre Luiz
dc.creatorPrata, Alvaro Toubes
dc.creatorMelo, Claudio
dc.date2014-12-03T13:11:50Z
dc.date2016-10-25T20:15:20Z
dc.date2014-12-03T13:11:50Z
dc.date2016-10-25T20:15:20Z
dc.date2014-01-01
dc.date.accessioned2017-04-06T06:35:29Z
dc.date.available2017-04-06T06:35:29Z
dc.identifierJournal Of The Brazilian Society Of Mechanical Sciences And Engineering. Rio De Janeiro Rj: Abcm Brazilian Soc Mechanical Sciences & Engineering, v. 36, n. 1, p. 1-12, 2014.
dc.identifier1678-5878
dc.identifierhttp://hdl.handle.net/11449/113631
dc.identifierhttp://acervodigital.unesp.br/handle/11449/113631
dc.identifier10.1007/s40430-013-0051-9
dc.identifierWOS:000329101000001
dc.identifierhttp://dx.doi.org/10.1007/s40430-013-0051-9
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/924372
dc.descriptionThis work presents a numerical model to simulate refrigerant flow through capillary tubes, commonly used as expansion devices in refrigeration systems. The flow is divided in a single-phase region, where the refrigerant is in the subcooled liquid state, and a region of two-phase flow. The capillary tube is considered straight and horizontal. The flow is taken as one-dimensional and adiabatic. Steady-state condition is also assumed and the metastable flow phenomena are neglected. The two-fluid model, considering the hydrodynamic and thermal non-equilibrium between the liquid and vapor phases, is applied to the two-phase flow region. Comparisons are made with experimental measurements of the mass flow rate and pressure distribution along two capillary tubes working with refrigerant R-134a in different operating conditions. The results indicate that the present model provides a better estimation than the commonly employed homogeneous model. Some computational results referring to the quality, void fraction, velocities, and temperatures of each phase are presented and discussed.
dc.languageeng
dc.publisherAbcm Brazilian Soc Mechanical Sciences & Engineering
dc.relationJournal of the Brazilian Society of Mechanical Sciences and Engineering
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectCapillary tubes
dc.subjectTwo-fluid model
dc.subjectComputer modeling
dc.titleA two-fluid model for refrigerant flow through adiabatic capillary tubes
dc.typeOtro


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