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Journal of Enhanced Heat Transfer

Publicado 8 números por año

ISSN Imprimir: 1065-5131

ISSN En Línea: 1563-5074

The Impact Factor measures the average number of citations received in a particular year by papers published in the journal during the two preceding years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) IF: 2.3 To calculate the five year Impact Factor, citations are counted in 2017 to the previous five years and divided by the source items published in the previous five years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) 5-Year IF: 1.8 The Immediacy Index is the average number of times an article is cited in the year it is published. The journal Immediacy Index indicates how quickly articles in a journal are cited. Immediacy Index: 0.2 The Eigenfactor score, developed by Jevin West and Carl Bergstrom at the University of Washington, is a rating of the total importance of a scientific journal. Journals are rated according to the number of incoming citations, with citations from highly ranked journals weighted to make a larger contribution to the eigenfactor than those from poorly ranked journals. Eigenfactor: 0.00037 The Journal Citation Indicator (JCI) is a single measurement of the field-normalized citation impact of journals in the Web of Science Core Collection across disciplines. The key words here are that the metric is normalized and cross-disciplinary. JCI: 0.6 SJR: 0.433 SNIP: 0.593 CiteScore™:: 4.3 H-Index: 35

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HEAT TRANSFER ENHANCEMENT CAUSED BY IMPINGING JETS OF Al2O33-WATER NANOFLUID ON A MICRO-PIN FIN ROUGHENED SURFACE UNDER CROSSFLOW CONDITIONS−A NUMERICAL STUDY

Volumen 27, Edición 4, 2020, pp. 367-387
DOI: 10.1615/JEnhHeatTransf.2020033413
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SINOPSIS

Advanced electronic devices need ultrahigh performance cooling techniques. One such technique is jet impingement cooling. This study numerically investigates the thermal performance and flow behavior of an array of alumina oxide-water nanofluid impinging jet systems under crossflow. The Reynolds number of the jet array ranges between 4000 and 20,000 with a normalized distance between the jet's outlet and target plate (Z/D) equal to 3. The target wall is roughened with micro-pin fins for surface enlargement. All of the computations are done in ANSYS-FLUENT using the shear stress transport k-ω turbulence model. The paper reports numerical predictions matching satisfactorily well with the empirical data. However, more research in the context of turbulence models solely for turbulent nanofluid modeling is recommended for future studies. The influence of volumetric concentrations φ = 0%, 0.2%, 0.7%, 1.5%, and 3% of Al2O3 nanoparticles is explored. It is inferred from the simulations that the addition of the nanoparticles does not influence the velocity field with the simplified method used in the current work. It can also be inferred that the increasing values of the nanoparticle concentration would cause a rise in the nanofluid equivalent thermal conductivity leading to a reduction in the Nusselt number, whereas the average convective heat transfer coefficient would improve. About 72% improvement in the heat transfer coefficient (h) of the nanofluid is observed while the Nusselt number is reduced by about 30% at volumetric concentration φ = 3%. The addition of pin fins would help in further heat transfer improvement.

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CITADO POR
  1. Allauddin Usman, Mohiuddin Rafay, Khan Hafiz Mohammad Usman, Uddin Naseem, Khan Waqar A., Nanoscale heat transfer investigation of an array of impinging jet systems with different working fluids under crossflow with and without pin fins, Heat Transfer, 50, 1, 2021. Crossref

  2. Hussain Liaqat, Khan Muhammad Mahabat, Masud Manzar, Ahmed Fawad, Rehman Zabdur, Amanowicz Łukasz, Rajski Krzysztof, Heat Transfer Augmentation through Different Jet Impingement Techniques: A State-of-the-Art Review, Energies, 14, 20, 2021. Crossref

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