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Tenth International Symposium on Turbulence and Shear Flow Phenomena
July, 7-9, 2017 , Swissotel Chicago, Chicago, Illinois, U.S.A.

DOI: 10.1615/TSFP10

Simulation of the turbulent flow over an array of flexible blades

pages 119-123
DOI: 10.1615/TSFP10.220
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摘要

Aquatic ecosystems constitute a key topic due to their abundance and their various roles on different scales, ranging from the quality of drinking water taken from the local river to the large-scale impact on climate change. The fluid mechanical interaction between the flow and the flexible plants in an aquatic canopy is a key element determining hydraulics, as well as the transport of sediment, nutrients, and pollutants. In order to fully understand the mutual interaction between the fluid flow and the plants a detailed analysis of the generated three-dimensional flow data is of crucial importance.
This work presents a numerical method which is well suited for simulations of abstracted aquatic canopy flows in the framework of a Large Eddy Simulation. It is employed to simulate the turbulent flow over a model canopy of 800 flexible blades at a Cauchy number of 16.5 which is the largest canopy-resolving simulation of this type done so far. The simulation data are analysed to get a deeper understanding of the physics of aquatic canopies, e.g., concerning the existence and shape of coherent vortex structures.

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