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International Journal of Fluid Mechanics Research

Erscheint 6 Ausgaben pro Jahr

ISSN Druckformat: 2152-5102

ISSN Online: 2152-5110

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: 1.1 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: 1.3 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: 0.0002 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: 0.33 SJR: 0.256 SNIP: 0.49 CiteScore™:: 2.4 H-Index: 23

Indexed in

Suppression of Secondary Flow through Sidewall Converging in Model Horizontal Longitudinal MOCVD Processes

Volumen 39, Ausgabe 6, 2012, pp. 478-493
DOI: 10.1615/InterJFluidMechRes.v39.i6.20
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ABSTRAKT

Experimental flow visualization has been conducted to investigate how the sidewall converging affects the buoyancy induced return flow structure and stabilization of vortex flow in mixed convection of gas in a horizontal rectangular duct. The buoyancy driven secondary flow including the return flow and vortex flow is driven by a heated circular disk embedded in the bottom plate of the duct, simulating that in a horizontal longitudinal MOCVD reactor. Specifically, the sidewalls of the duct are inclined toward the duct core so that the gas flow in the duct is accelerated, causing the local buoyancy-to-inertia ratio to decrease in the main flow direction. In the experiment the Reynolds and Rayleigh numbers of the flow at the duct inlet are respectively varied from 5.1 to 51.2 and from 7200 to 21000, and the duct aspect ratio is reduced from 20 at the inlet to 16 or 12 at the exit. The results show a substantial delay in the onset of the return flow and the effective suppression of the buoyancy driven unstable longitudinal and transverse vortex flows by the sidewall converging. Moreover, the sidewall converging can weaken the return flow more effectively at slightly higher Reynolds numbers. An empirical equation is provided to correlate the present data for the onset condition of the return flow in the converging duct. The reduction in the size and intensity of the return flow is prominent. Besides, the onsets of longitudinal and transverse vortex rolls are delayed substantially.

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