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Journal of Flow Visualization and Image Processing

年間 4 号発行

ISSN 印刷: 1065-3090

ISSN オンライン: 1940-4336

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: 0.6 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: 0.6 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: 0.00013 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: 0.14 SJR: 0.201 SNIP: 0.313 CiteScore™:: 1.2 H-Index: 13

Indexed in

FLOW STRUCTURES AROUND A LARGE-DIAMETER CIRCULAR CYLINDER

巻 19, 発行 1, 2012, pp. 15-35
DOI: 10.1615/JFlowVisImageProc.2012005088
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要約

In ocean and coastal engineering, a widely used tool for the investigation of wave phenomena is the velocity potential, in which both hypotheses of inviscid fluid and irrotational flow are incorporated. In some cases, a close-form analytical expression of the potential can be devised. In other cases, and especially in complex problems of contemporary engineering, no expressions of the potential exist, so that the system of the Euler equations - cast in terms of the potential - is solved numerically, usually by means of numerical techniques of integral nature. It can though be recognized that the assumptions of both inviscid fluid and irrotational flow are rather restrictive.
Within this class of problems, if one wants firstly (mainly due to limited computing power available) to give up one of the two previous hypothesis - namely, that of irrotational flow - an appropriate strategy for the investigation of wave-related phenomena is represented by the numerical integration of the Euler equations in the velocity-pressure formulation. Under this viewpoint it becomes of remarkable importance to investigate the differences that exist between a flow field derived from a velocity potential and one resulting from the numerical solution of the Euler equations in primitive variables, as related to the wave case at hand.
In this work these issues - relatively unexplored in the literature - are addressed, with reference to the case of the diffraction of water waves caused by a large-diameter, surface-piercing, vertical circular cylinder. The close-form velocity potential for this problem is first analyzed, as related to a number of strictly linear wave cases. Then, some of these cases are simulated numerically by solving the Euler equations in primitive variables, and the results are compared. For further investigation of the flow fields, the swirling-strength criterion for flow-structure extraction is applied to the velocity fields related to one of the wave cases examined. It is found that, in terms of flow structures, remarkable differences exist between the differently derived flow fields.

によって引用された
  1. Alfonsi Giancarlo, Lauria Agostino, Primavera Leonardo, The Field of Flow Structures Generated by a Wave of Viscous Fluid Around Vertical Circular Cylinder Piercing the Free Surface, Procedia Engineering, 116, 2015. Crossref

  2. Alfonsi Giancarlo, Numerical Simulations of Wave-Induced Flow Fields around Large-Diameter Surface-Piercing Vertical Circular Cylinder, Computation, 3, 3, 2015. Crossref

  3. Alfonsi Giancarlo, Lauria Agostino, Primavera Leonardo, Recent Results from Analysis of Flow Structures and Energy Modes Induced by Viscous Wave around a Surface-Piercing Cylinder, Mathematical Problems in Engineering, 2017, 2017. Crossref

  4. Bose Sujit K., Dey Subhasish, Far-wake flows downstream of cylinders: A novel generalized similarity method, European Journal of Mechanics - B/Fluids, 67, 2018. Crossref

  5. Aristodemo Francesco, Tripepi Giuseppe, Algieri Ferraro Danilo, Veltri Paolo, An experimental and numerical study on solitary wave loads at cylinders near the bed, Ocean Engineering, 195, 2020. Crossref

  6. D’Ippolito Antonino, Lauria Agostino, Alfonsi Giancarlo, Calomino Francesco, Investigation of flow resistance exerted by rigid emergent vegetation in open channel, Acta Geophysica, 67, 3, 2019. Crossref

  7. Ferraro D., Lauria A., Penna N., Gaudio R., Unconfined propeller scour in waterways: The role of flow intensity, Physics of Fluids, 34, 9, 2022. Crossref

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