Ship-Generated Waves

Sorensen, Robert M.

doi:10.1016/b978-0-12-021809-7.50007-9

Cited by 45 publications

(53 citation statements)

References 17 publications

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“…The discussion of the previous sections on theCerenkov effect in classical electromagnetism and on the response of superfluids to moving impurities puts us in the position of getting an easy qualitative understanding of the surface waves that are generated by a duck steadily swimming on the surface of a quiet pond or, equivalently, a fishing line in a uniformly flowing river 5 . This system is by far the most accessible from the experimental point of view, but perhaps also the richest one for the variety of different behaviors that can be observed depending on the system parameters.…”

Section: Surface Waves On a Liquidmentioning

confidence: 99%

“…More complete treatments based on the full hydrodynamic equations including nonlinear effects can be found in the dedicated literature, see e.g. [1,2,3,4,6,7,8,5,9, 10].…”

Section: Surface Waves On a Liquidmentioning

confidence: 99%

“…6: not only does this example provide the most intuitive example of the generalizedCerenkov effect, but is perhaps also the richest one in terms of different behaviors that can be observed depending on the system parameters, e.g. the velocity of the object with respect to the fluid, the depth of the water, the surface tension of the fluid [1,2,3,4,5,6,7,8,9,10]. The concepts that have been laid down so far are finally applied in Sec.7 to analog models of gravity based on flowing superfluids or surface waves on flowing water.…”

Section: Introductionmentioning

confidence: 99%

“…The emission of radiation by a uniformly moving source is a widely used paradigm in field theories to describe a number of very different effects, from the wake generated by a swimming duck on the surface of a quiet lake [1,2,3,4,5,6,7,8,9,10], to theCerenkov emission by a charged particle relativistically moving through a dielectric medium [11], to the sound waves emitted by an object traveling across a fluid or a superfluid at super-sonic speed [12,13,14,15]. Of course, the radiated field has a different physical nature in each case, consisting e.g.…”

Section: Introductionmentioning

confidence: 99%

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The C̆erenkov Effect Revisited: From Swimming Ducks to Zero Modes in Gravitational Analogues

Carusotto

Rousseaux²

2013

Lecture Notes in Physics

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We present an interdisciplinary review of the generalizedCerenkov emission of radiation from uniformly moving sources in the different contexts of classical electromagnetism, superfluid hydrodynamics, and classical hydrodynamics. The details of each specific physical systems enter our theory via the dispersion law of the excitations. A geometrical recipe to obtain the emission patterns in both real and wavevector space from the geometrical shape of the dispersion law is discussed and applied to a number of cases of current experimental interest. Some consequences of these emission processes onto the stability of condensed-matter analogs of gravitational systems are finally illustrated.

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Section: Surface Waves On a Liquidmentioning

confidence: 99%

“…More complete treatments based on the full hydrodynamic equations including nonlinear effects can be found in the dedicated literature, see e.g. [1,2,3,4,6,7,8,5,9, 10].…”

Section: Surface Waves On a Liquidmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The C̆erenkov Effect Revisited: From Swimming Ducks to Zero Modes in Gravitational Analogues

Carusotto

Rousseaux²

2013

Lecture Notes in Physics

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“…Several studies investigated the properties and the importance of regular ship traffic in rivers and channels or shelf regions (e.g., Sorensen 1973;Stumbo 1999;Bauer et al 2002) and the relevance of highspeed catamaran ferries in coastal environments (Parnell and Kofoed-Hansen 2001;Soomere 2005), but only few studies focused on ship waves in lakes (Bhowmik 1975;Maynord 2005). Because of their specific generation, ship and wind waves have considerably different properties (e.g., wave form, period, and length) and thus potentially have a different ecological effect in the littoral zone (Bauer et al 2002;Soomere 2005;Erm and Soomere 2006).…”

mentioning

confidence: 99%

The relative importance of wind and ship waves in the littoral zone of a large lake

Hofmann

Lorke

Peeters

2008

Limnology & Oceanography

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Surface waves and their interactions with sediments and benthic organisms are the main hydrodynamic process affecting littoral ecosystems. Here, we present a long-term data set on surface-wave parameters, which was obtained from the analysis of measurements with a pressure sensor. The data set covers a time period of a year and allows for resolving waves with heights down to less than a centimeter and frequencies up to 0.8 Hz. Wind waves and three different types of ship waves were distinguished by their spectral properties. In Lake Constance, ship-generated waves are as important as wind-generated waves and contribute about 41% of the annual mean wave energy flux to shore. In summer, during the most productive time period, ship waves dominate the wave field in terms of the energy flux to shore and also in their frequency of occurrence. Ship waves cause a diurnal and a seasonal pattern in the frequency of occurrence and in the heights of surface waves, whereas in the case of wind waves these parameters do not vary significantly with season or between nighttime and daytime. In contrast to wind waves that occur only sporadically, ship waves propagate into the littoral zone very frequently at regular time intervals. The different pattern of occurrence of ship and wind waves results in a different pattern of disturbance in the littoral ecosystem.

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Wave height from planing and semi-planing small boats

Maynord

2005

River Res. Applic.

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The increasing number of small boats has raised concerns about their effects on the environment, particularly their waves. Bank erosion is one of the foremost concerns of boat waves but disruption of habitat, resuspension of bottom sediments, and damage to aquatic plants are other areas of concern. A large programme of field measurement of boat waves was conducted on Johnson Lake in Alaska to evaluate boats typically used on the Kenai River. The boat wave study compared wave characteristics of four boats under a variety of loadings, speeds, distances and motor powers. Over 400 tests were run on Johnson Lake with each test providing wave measurement at four locations. Two measures of waves and two types of tests were used in the study. MAX-POW was the wave height at the maximum power of the motor. MAXWAV was the maximum wave height produced by the boat which required runs at a range of speeds to determine the MAXWAV. While the MAXWAV data herein have considerable scatter in magnitude, the conditions at which MAXWAVoccurs are consistent from boat to boat. To prevent generation of maximum wave heights, small boats should operate as far as possible either above or below length Froude number of 0.6, displacement Froude number of 1.3, or beam Froude number of 1.0. A general boat wave height equation was developed for the four boats based on boat speed, volume displaced by the boat and distance from the boat, and are applicable to semi-planing and planing boats based on MAXPOW and MAXWAV data. The predictive equation for V-hull boats was compared to independent data not used in the development and was found to be in agreement with the data.

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Ship-Generated Waves

Cited by 45 publications

References 17 publications

The C̆erenkov Effect Revisited: From Swimming Ducks to Zero Modes in Gravitational Analogues

The C̆erenkov Effect Revisited: From Swimming Ducks to Zero Modes in Gravitational Analogues

The relative importance of wind and ship waves in the littoral zone of a large lake

Wave height from planing and semi-planing small boats

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