Numerical simulation of flow past a curved cylinder in uniform and logarithmic flow. (3rd April 2017)

• Record Type: Journal Article
• Authors: Xu, Tianyu; Cater, John E.
• Is Part Of: Ships and offshore structures. Volume 12:Number 3(2017)
• Page Start: 323
• Page End: 329
• Publication Date: 2017-04-03
• Subjects: marine riser -- curved cylinder -- logarithmic flow -- vortex shedding; Ships -- Periodicals; Offshore structures -- Periodicals; Marine engineering -- Periodicals; Marine engineering -- Technological innovations -- Periodicals; Ocean engineering -- Periodicals; Ocean engineering -- Technological innovations -- Periodicals; 623.8
• DOI: 10.1080/17445302.2016.1139259
• Languages: English
• ISSNs: 1744-5302

Abstract

Abstract : This research presents a computational fluid dynamics study for simulating a curved cylinder in ocean currents. A rigid curved cylindrical geometry with two bending directions was modelled in uniform and logarithmic flow profiles at a maximum Reynolds number of 1.5 × 10 5 ; the Realizable k –epsilon formulation is used as the turbulence closure model. An analysis of force coefficients and vortex structure are presented. The results show that a curved cylindrical structure will have different hydrodynamic behaviour depending on the oncoming flow direction. Bending the cylinder in a direction which is opposite to the predominant flow direction is recommended, as the maximum forcing amplitude is reduced in this case.