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International Journal of Fluid Mechanics Research

Publication de 6  numéros par an

ISSN Imprimer: 2152-5102

ISSN En ligne: 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

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DRAG REDUCTION AND DEGRADATION CHARACTERISTICS OF NATA DE COCO SUSPENSION IN SPIRAL PIPE

Volume 47, Numéro 5, 2020, pp. 399-406
DOI: 10.1615/InterJFluidMechRes.2020030366
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RÉSUMÉ

Recently, the research of energy efficiency in some areas is an important topic to be developed. In fluid flow, some techniques are developed in order to decrease the pressure drop. Therefore, some researchers add several kinds of additives in order to obtain drag reduction. The purpose of this research is to investigate the effect of nata de coco fiber suspension due to the drag reduction characteristic in the spiral pipe. The experiment was conducted from low-to high-Reynolds number, up to 20,000. The percentage of drag reduction was calculated using the obtained experimental data, in presence of the drag reducing agent. The results showed that the addition of nata de coco fiber suspension into water can reduce drag either on circular pipe or spiral pipe. The maximum drag reduction of concentration 60 ppm for spiral pipe is about 24.7%, and for circular pipe is about 22.1%, at a Reynolds number of about 19,000. It was observed that the drag reduction tended to be constant, with an increase in concentration after 60 ppm. The nata de coco fiber solution tends to spread and flow straightly at the center of the experimental pipe, and a water layer develops at the wall. It reduces the wall friction and reaches the maximum drag reduction. Further, the nata de coco fiber suspension is good for the mechanical degradation effect. Based on this research, it can be concluded that nata de coco can be considered as a drag reducing agent.

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