Scientific article
Open access

Mean flow modeling in high-order nonlinear Schrödinger equations

Published inPhysics of fluids, vol. 35, no. 8, 087128
Publication date2023-08-01
First online date2023-08-21

The evaluation and consideration of the mean flow in wave evolution equations are necessary for the accurate prediction of fluid particle trajectories under wave groups, with relevant implications in several domains, from the transport of pollutants in the ocean to the estimation of energy and momentum exchanges between the waves at small scales and the ocean circulation at large scale. We derive an expression of the mean flow at a finite water depth, which, in contrast to other approximations in the literature, accurately accords with the deep-water limit at third order in steepness and is equivalent to second-order formulations in intermediate water. We also provide envelope evolution equations at fourth order in steepness for the propagation of unidirectional wave groups either in time or space that include the respective mean flow term. The latter, in particular, is required for accurately modeling experiments in water wave flumes in arbitrary depths.

Citation (ISO format)
GOMEL, Alexis et al. Mean flow modeling in high-order nonlinear Schrödinger equations. In: Physics of fluids, 2023, vol. 35, n° 8, p. 087128. doi: 10.1063/5.0164784
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Article (Published version)
ISSN of the journal1070-6631

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