Browsing School of Engineering by Author "Hoyal, D. C. J. D."

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Bedform dynamics from coupled bed-flow direct numerical simulations

Zgheib, N.; Fedele, J. J.; Hoyal, D. C. J. D.; Perillo, M. M.; Balachandar, S. (2019-11-19)

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 ...
Direct numerical simulation of transverse ripples. 1. Pattern initiation and bedform interactions

Zgheib, N.; Fedele, J. J.; Hoyal, D. C. J. D.; Perillo, M. M.; Balachandar, S. (2019-11-15)

We present results of coupled direct numerical simulations between flow and a deformable bed in a horizontally periodic, turbulent open channel at a shear Reynolds number of Reτ = 180. The feedback between the temporally ...
Direct numerical simulation of transverse ripples. 2. Self‐similarity, bedform coarsening, and effect of neighboring structures

Zgheib, N.; Fedele, J. J.; Hoyal, D. C. J. D.; Perillo, M. M.; Balachandar, S. (2019-11-15)

Coupled bed‐flow direct numerical simulations investigating the early stages of pattern formation and bedform (ripple) interactions were examined in a previous paper (Part 1), making use of the resolved flow field. In this ...

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