Potential flow over a submerged rectangular obstacle: Consequences for initiation of boulder motion

Herterich, James G.; Dias, Frédéric

doi:10.1017/s0956792519000214

Cited by 3 publications

(2 citation statements)

References 75 publications

(139 reference statements)

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“…Reference [50] pointed out that, apart from flaws in the formulas, the estimation of both C L and C D is critical; therefore, instead of applying values excerpted from the literature, the estimation should be accomplished with strict reference to the local physical conditions. As an example, higher values than the one (0.178) usually used for C L were obtained by both field and modeling investigations [51,52]. Such a finding reduces the minimum energy wave required to initiate the boulder displacement (see the equations in Section 5).…”

Section: Boulder Displacements and Wave Energymentioning

confidence: 92%

Storm-Induced Boulder Displacements: Inferences from Field Surveys and Hydrodynamic Equations

et al. 2020

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The storm of 12–13 November 2019 provoked the displacements of boulders on a central Mediterranean rocky coast; with reference to a selected area, prone to boulder production and geomorphologically monitored for years, a field-oriented study approach was applied for the phenomenon, by collating data concerning the pre-storm locations and kinematics of these boulders. The number of displaced boulders is 11, that is in terms of the morphological imprint of a specific storm, one of the major study cases for the Mediterranean. In addition, based on widely used hydrodynamic equations, the minimum wave height required to displace the boulders is assessed. The values conform with the expected values for the wave climate dominating during the causative meteorological event and give a measure of the energy of the storm slamming the coast. Boulder dislodgement usually plays a key role in determining the rate of the coastal recession, likely also in the investigated area. In view of an adverse climate evolution with a possible increase of the energy and frequency of severe storms, the results deriving from the study of this morphodynamics should be considered for hazard assessment and coastal management.

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Section: Boulder Displacements and Wave Energymentioning

confidence: 92%

Storm-Induced Boulder Displacements: Inferences from Field Surveys and Hydrodynamic Equations

et al. 2020

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“…King and Bloor [31] investigated free-surface flow produced by polygonal obstacles, and even devised a numerical conformal-mapping technique based on a continuous Schwarz–Christoffel mapping [32]. More recent flows over rectangular obstacles have been presented by Herterich and Dias [25].…”

Section: Unsteady Spectral Formulationmentioning

confidence: 99%

Ideal Planar Fluid Flow Over a Submerged Obstacle: Review and Extension

2021

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A classical problem in free-surface hydrodynamics concerns flow in a channel, when an obstacle is placed on the bottom. Steady-state flows exist and may adopt one of three possible configurations, depending on the fluid speed and the obstacle height; perhaps the best known has an apparently uniform flow upstream of the obstacle, followed by a semiinfinite train of downstream gravity waves. When time-dependent behaviour is taken into account, it is found that conditions upstream of the obstacle are more complicated, however, and can include a train of upstream-advancing solitons. This paper gives a critical overview of these concepts, and also presents a new semianalytical spectral method for the numerical description of unsteady behaviour.

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Systematic Review Shows That Work Done by Storm Waves Can Be Misinterpreted as Tsunami-Related Because Commonly Used Hydrodynamic Equations Are Flawed

et al. 2020

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Cox et al. Boulder Deposits and Storm Waves during storms and should therefore be re-evaluated. This is especially important for CBD that have been incorporated into long-term coastal risk assessments, which are compromised if the CBD are misinterpreted. CBD dynamics can be better determined from a combination of detailed field measurements, modeling, and experiments. A clearer understanding of emplacement mechanisms will result in more reliable hazard analysis.

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Potential flow over a submerged rectangular obstacle: Consequences for initiation of boulder motion

Cited by 3 publications

References 75 publications

Storm-Induced Boulder Displacements: Inferences from Field Surveys and Hydrodynamic Equations

Storm-Induced Boulder Displacements: Inferences from Field Surveys and Hydrodynamic Equations

Ideal Planar Fluid Flow Over a Submerged Obstacle: Review and Extension

Systematic Review Shows That Work Done by Storm Waves Can Be Misinterpreted as Tsunami-Related Because Commonly Used Hydrodynamic Equations Are Flawed

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