Effects of tidal bores on turbulent mixing : a numerical and physical study in positive surges
type: Dataset
description: Tidal bores are surge waves propagating upstream rivers as the tide rushes into estuaries. They induce large turbulences and mixing of the river and estuary flow of which effects remain scarcely studied. Herein, tidal bores are investigated experimentally and numerically with an idealised model of positive surges propagating upstream an initially steady flow. The experimental work estimated flow changes and typical turbulent length scale evolution induced by undular bores with and without breaking roller. The bore passage was associated with large free surface and flow velocity fluctuations, together with some variations of the integral turbulent scales. Coherent turbulent structures appeared in the wake of leading wave near the bed and moved upward into the water column during the bore propagation. The numerical simulations were based on previous experimental work on undular bores. Some test cases were realised to verify the accuracy of the numerical methods. The results gave access to the detailed flow evolution during the bore propagation. Large velocity reversals were observed close to the no-slip boundaries. In some configurations, coherent turbulent structures appeared against the walls in the wake of the bore front.
landing page: https://theses.hal.science/tel-00965582
identifier: NNT: 2013BOR15231
keyword: coherent-structures
keyword: correlation-double
keyword: ecoulement-a-surface-libre
keyword: infoeu-reposemanticsdoctoralthesis
keyword: large-eddy-simulation
keyword: mascaret
keyword: modelisation-physique
keyword: numerical-simulation
keyword: onde-positive
keyword: physical-modelling
keyword: positive-surge
keyword: simulation-des-grandes-echelles
keyword: simulation-numerique
keyword: spiotherengineering-sciences-physicsother
keyword: structures-coherentes
keyword: theses
keyword: tidal-bore
keyword: turbulence
keyword: two-point-correlation
keyword: unsteady-open-channel-flow
issued: 2026-05-05T20:57:10.680305
modified: 2026-05-05T20:57:10.680310
language: en
contact point: Organization
  fn: CCSD

test_moissonnage_selune
type: Agent

Effects of tidal bores on turbulent mixing : a numerical and physical study in positive surges
type: Distribution
format: HTML
access URL: https://theses.hal.science/tel-00965582
issued: 2026-05-05T20:57:10.695156
modified: 2026-05-05T20:57:10.660749