Gyre formation in open and deep lacustrine embayments: the example of Lake Geneva, Switzerland
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Author(s)
Lemmin, U.
Bouffard, D.
Wüest, A.
Uittenbogaard, R. E
Barry, D. A
Razmi, A. M.
Uittenbogaard, R. E.
Barry, D. A.
Razmi, Amir Mehdi
Date Issued
November 2016
Journal
Environmental Fluid Mechanics
Publisher
Springer Netherlands
Citation
Razmi, A. M. et al. “Gyre Formation in Open and Deep Lacustrine Embayments: The Example of Lake Geneva, Switzerland.” Environmental Fluid Mechanics 17.3 (2017): 415–428.
Version
Author's final manuscript
Abstract
Numerical simulations were carried out to investigate gyres within open lacustrine embayments subjected to parallel-to-shore currents. In such embayments, gyre formation occurs due to flow separation at the embayment’s upstream edge. High momentum fluid from the mixing layer between the embayment and offshore flows into the embayment and produces recirculating flow. Systematic numerical experiments using different synthetic embayment configurations were used to examine the impact of embayment geometry. Geometries included embayments with different aspect ratios, depths and embayment corner angles. The magnitudes of the recirculation and turbulent kinetic energy (TKE) in the embayment vary significantly for angles in the range 40°–55°. Embayments with corner angles less than 50° have much stronger recirculation and TKE, other parameters remaining the same. The numerical findings are consistent with gyre formation observed in two embayments located in Lake Geneva, Switzerland, and thus help explain flow patterns recorded in lacustrine shoreline regions.
MIT Department
Massachusetts Institute of Technology. Department of Civil and Environmental Engineering
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1007/s10652-016-9494-8
