Divergence modes of a cluster of simply supported arrays in axial flow

Abstract : This paper is a numerical study of the static divergence patterns that could be observed upon a cluster of flexible cylinders in axial water flow. Previous experimental work has shown that beyond a critical flow velocity, characteristic deformation patterns can indeed be observed for square cylinder arrays in axial flow. This paper attempts to rewrite the physical problem in mathematical terms in which the fluid and cylinder coupling forces are modeled using influence coefficients. These coefficients are calculated and compared using two methods: simple potential flow and CFD including more complex turbulence modeling. The full static divergence problem is then numerically solved for an example system of a 10x10 cylinder arrays. Finally, the results for the divergence modes are visually presented and the intervening physical couplings are commented.
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Submitted on : Wednesday, December 7, 2016 - 6:26:25 PM
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  • HAL Id : hal-01412044, version 1

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Julie Adjiman, Pierre Moussou, Olivier Doaré, Hassan Berro, Oana-Zenaida Pascan, et al.. Divergence modes of a cluster of simply supported arrays in axial flow. Flow-Induced Vibration, Jul 2016, La Haye, France. ⟨hal-01412044⟩

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