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Atomization and Sprays

Published 12 issues per year

ISSN Print: 1044-5110

ISSN Online: 1936-2684

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: 1.2 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: 0.3 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: 0.00095 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: 0.28 SJR: 0.341 SNIP: 0.536 CiteScore™:: 1.9 H-Index: 57

Indexed in

CONVECTIVE HEAT TRANSFER OF AN IMPINGING OIL JET BETWEEN A TWO-PHASE FLOW AND A HOT SURFACE

Volume 22, Issue 3, 2012, pp. 185-205
DOI: 10.1615/AtomizSpr.2012004905
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ABSTRACT

The present work aims to study numerically the cooling system in car engines to ensure the piston thermo-mechanical resistance. Most engines use an oil jet cooling system coupled with "cocktail shaking" to extract heat from the piston. This cooling method brings into play a two-phase incompressible turbulent flow in a mobile environment, because of motion of pistons in the cylinder. The need for a more effective cooling involves an accurate understanding of the physical mechanisms. The idea is to support the engine design process to account for advanced technologies to improve turbine or engine performances, burn less fuel and generate less green house gas. In the present work, a numerical model dedicated to the simulation at small scale of oil/air two-phase flows and related heat transfers is proposed to characterize the cooling of engine elements under fragmented jet impact. Large Eddy Simulations of an impinging liquid jet onto a heated semi-hemispherical target were run and the nu-merical results were compared with experimental data. The mixed-scale model (P. Sagaut, Large Eddy Simulation for Incompressible Flows, Springer, 2000) and the Wall Adapting Local Eddy (WALE) model (Nicoud and Ducros, Flow, Turbulence and Combustion, vol. 62, pp. 183−200, 1999) were evaluated. The best results were obtained using the WALE approach, the mixed-scale model being too dissipative near solid walls. Then cocktail shaking in simplified piston geometries is presented to illustrate the interest of the global simulation approach.

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