Articles | Volume 14, issue 2
https://doi.org/10.5194/esurf-14-269-2026
https://doi.org/10.5194/esurf-14-269-2026
Research article
 | 
24 Mar 2026
Research article |  | 24 Mar 2026

Experimental study of time-averaged flow and turbulence over asymmetric tidal dunes

Kevin Bobiles, Bernhard Kondziella, Christina Carstensen, Elda Miramontes, Ingrid Holzwarth, and Alice Lefebvre

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Cited articles

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Bennett, S. J. and Best, J. L.: Mean flow and turbulence structure over fixed, two-dimensional dunes: implications for sediment transport and bedform stability, Sedimentology, 42, 491–513, https://doi.org/10.1111/j.1365-3091.1995.tb00386.x, 1995. 
Best, J.: The fluid dynamics of river dunes: A review and some future research directions, J. Geophys. Res., 110, 21, https://doi.org/10.1029/2004JF000218, 2005. 
Best, J. and Kostaschuk, R.: An experimental study of turbulent flow over a low-angle dune, J. Geophys. Res., 107, 3135, https://doi.org/10.1029/2000JC000294, 2002. 
Bobiles, K., Kondziella, B., Carstensen, C., Miramontes, E., Holzwarth, I., and Lefebvre, A.: Experimental data of flow and turbulence properties above tidal dunes, PANGAEA [data set], https://doi.org/10.1594/PANGAEA.988194, 2026. 
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Short summary
This study examines how the shape of tidal dunes influences flow and turbulence under reversing currents, simulating tidal conditions in a large flume. We show that dune slope properties significantly affect flow patterns, especially the presence and size of intermittent or permanent flow separation and turbulent wake. The results highlight the key role of dune morphology in shaping flow dynamics, with implications for sediment transport and coastal morphodynamics.
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