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Journal of Enhanced Heat Transfer

Publication de 8  numéros par an

ISSN Imprimer: 1065-5131

ISSN En ligne: 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

Indexed in

Prediction of Sliding Bubble Velocity and Mechanism of Sliding Bubble Motion along the Surface

Volume 17, Numéro 2, 2010, pp. 111-124
DOI: 10.1615/JEnhHeatTransf.v17.i2.10
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RÉSUMÉ

Sliding bubbles play an important role in heat transfer enhancement, the mechanism of sliding bubble motion along the surface is required for further comprehension in order to develop reliable heat transfer mechanism models. The momentum equation on a single sliding bubble in the x-direction is built on the analysis of the balance of forces, in which the sliding bubble velocity is obtained by a numerical method, and it is compared with the experimental data of Maity [2000]. The predicted results show that the sliding bubble velocity increases with time. The sliding bubble velocity for horizontal flow boiling is lower than that of local liquid at the sliding bubble center of mass when the bubble just lifts off the surface, whereas the sliding bubble velocity for vertical flow boiling is higher than that of bulk liquid when the bubble just lifts off the surface. The mechanism of sliding bubble motion along the surface can be explained by the analysis of forces in the x-direction, which indicates that the main forces controlling the sliding bubble motion are the buoyancy, quasi-steady drag force, and added-mass force. However, since there is lack of the driving force in the y-direction to lift the bubble from the surface for pool and vertical flow boiling, it is probable that the inertia of the liquid flow beneath the bubble base due to the change in the bubble shape is the driving force to lift the bubble from the surface.

CITÉ PAR
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