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  Numerical investigation on characteristic flow regions for three staggered stationary circular cylinders.

Yan, W., Wu, J., Yang, S., & Wang, Y. (2016). Numerical investigation on characteristic flow regions for three staggered stationary circular cylinders. European Journal of Mechanics B-Fluids, 60, 48-61. doi:10.1016/j.euromechflu.2016.07.006.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002B-BD3B-5 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002D-4144-7
Genre: Journal Article

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Yan, W., Author
Wu, J., Author
Yang, S., Author
Wang, Yong1, Author              
Affiliations:
1Laboratory for Fluid Dynamics, Pattern Formation and Biocomplexity, Max Planck Institute for Dynamics and Self-Organization, Max Planck Society, ou_2063287              

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Free keywords: Lattice Boltzmann method; Immersed boundary method; Steady and unsteady regions; Vortex shedding
 Abstract: In this work, the characteristic flow regions for three stationary circular cylinders were numerically investigated by the multiple-relaxation-time (MRT) based lattice Boltzmann method (LBM). The immersed boundary method (IBM) was employed to handle the solid boundary of cylinders to account for the fluid-solid interaction. The cylinders were arranged in a staggered configuration, which means that one cylinder was placed in front of the others with side-by-side arrangement. The calculations were carried out at different spacing ratios T/D (varying from 1to10) and fixed spacing ratio S/D = 3 with a constant Reynolds number Re = 200, which represents a typical unsteady laminar flow. Here, D is the diameter of the cylinders, T is the spacing between the centers of two downstream cylinders, and S is the distance between the centers of the upstream cylinder and downstream cylinders. The experiments based on the laser-induced fluorescence (LIF) flow visualization were performed to verify the reliability of simulation results. The results indicated that the spacing ratio T/D has a significant influence on the wake structures. Two different characteristic steady and unsteady flow regions behind the upstream cylinder were observed. The characteristic steady flow occurs at the regions of 1 <= T/D <= 1.2 and 2.5 <= T/D <= 3.1, and the characteristic unsteady flow happens at the regions of 1.3 <= T/D <= 2.4 and 3.2 <= T/D <= 10. The present results would be helpful for designing multiple piers in the practical application.

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Language(s): eng - English
 Dates: 2016-07-282016-11
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1016/j.euromechflu.2016.07.006
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Title: European Journal of Mechanics B-Fluids
Source Genre: Journal
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Pages: - Volume / Issue: 60 Sequence Number: - Start / End Page: 48 - 61 Identifier: -