Effects of flow separation and shape factor of nanoparticles in heat transfer fluid for convection thorough phase change material (PCM) installed cylinder for energy technology applications

Simple item page
dc.contributor.authorSelimefendigil F.
dc.contributor.authorÖztop H.F.
dc.date.accessioned2024-07-22T08:05:47Z
dc.date.available2024-07-22T08:05:47Z
dc.date.issued2021
dc.description.abstractIn this study, flow separation effects on the performance of PCM embedded thermo-fluid system is numerically analyzed by using the finite element method. In the heat transfer fluid, shape effects of nanoparticles are considered. Spherical, blade, brick and cylindrical shaped alumina nanoparticles are used in water. The numerical work is performed for different values of Reynolds number (between 100 and 300), expansion ratio of the channel (0.35 and 1), nanoparticle volume fraction (between 0 and 2%) and different shape of particles. The PCM material is paraffin wax with spherical shaped capsules of 20 mm in diameter. There is significant impact of channel expansion and flow separation zone on the performance of the system. When the area expansion is introduced in the straight channel, the configuration with the highest Reynolds number resulted in performance degradation due to flow recirculation extended in the PCM region. The charging time for a straight channel is reduced by about 84% when comparison is made with the channel having an expansion ratio of 0.35. The shape factor of the alumina nanoparticles significantly affects the flow recirculations and thermal exchange between the PCM and heat transfer fluid. Among various particles, cylindrical shaped one performs best while 23.8% reduction in charging time is obtained at the highest solid volume fraction when comparison is made with pure water as heat transfer fluid. © 2021 Elsevier Ltd
dc.identifier.DOI-ID10.1016/j.est.2021.102945
dc.identifier.issn2352152X
dc.identifier.urihttp://akademikarsiv.cbu.edu.tr:4000/handle/123456789/13259
dc.language.isoEnglish
dc.publisherElsevier Ltd
dc.subjectAlumina
dc.subjectAluminum oxide
dc.subjectCharging time
dc.subjectFlow separation
dc.subjectHeat transfer
dc.subjectNanofluidics
dc.subjectNanoparticles
dc.subjectPhase change materials
dc.subjectReynolds number
dc.subjectVolume fraction
dc.subjectAlumina Nanoparticle
dc.subjectBackward facing-step
dc.subjectBackward- Facing step
dc.subjectElement method
dc.subjectHeat transfer fluids
dc.subjectNanofluids
dc.subjectParticle shape
dc.subjectPerformance
dc.subjectPhase Change
dc.subjectShapes factors
dc.subjectFinite element method
dc.titleEffects of flow separation and shape factor of nanoparticles in heat transfer fluid for convection thorough phase change material (PCM) installed cylinder for energy technology applications
dc.typeArticle

Files

Collections

Scopus Koleksiyonu