Bedform dynamics from coupled bed-flow direct numerical simulations
We present results of time-evolving coupled direct numerical simulations between an erodible bed and an overlying pressure-driven, turbulent flow field. A total of 6 simulations are considered, the details of which are shown in Table 1. The numerical setup consists of a horizontally periodic open ch...
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| Other Authors: | , , , |
| Format: | article |
| Published: |
2019
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| Online Access: | http://hdl.handle.net/10725/11541 https://doi.org/10.1051/matecconf/201926103001 http://libraries.lau.edu.lb/research/laur/terms-of-use/articles.php https://search.proquest.com/docview/2276915130/fulltextPDF/F5D693EA727942CBPQ/1?accountid=27870 |
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| Summary: | We present results of time-evolving coupled direct numerical simulations between an erodible bed and an overlying pressure-driven, turbulent flow field. A total of 6 simulations are considered, the details of which are shown in Table 1. The numerical setup consists of a horizontally periodic open channel, and the simulations are run at a shear Reynolds number of Reτ = 180. The coupling between the spatially and temporally evolving sediment bed and the flow field is enforced through the explicit immersed boundary method (IBM) of Uhlmann [1]. The flow field is fully resolved and is obtained by integrating the conservation of mass and momentum equations using a pseudo spectral code [2]. On the other hand, the sediment bed is modelled via the Exner equation [3]. Details about the numerical approach are available in [4-5]. |
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