Mathematical description of the stimuli to the lateral line system of fish, derived from a three-dimensional flow field analysis. III. The case of an oscillating sphere near the fish

Hassan, El-S.

doi:10.1007/bf00199452

Cited by 12 publications

(13 citation statements)

References 21 publications

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“…Satou et al demonstrated that the lateral line is involved in intersexual communication in the himé salmon (Oncorhynchus nerka) by showing that a spawning response was induced by a sphere vibrating at 21·Hz (Satou et al, 1994). The effect of the presence of the fish in distorting a dipole field has been investigated both theoretically (Hassan, 1993) and experimentally (Coombs et al, 1996), and it was shown to result in somewhat higher amplitudes but with minimal effect on the spatial characteristics of excitation patterns.…”

Section: Discussionmentioning

confidence: 99%

“…To date, only a limited number of investigations have been performed to understand how the information on distance of a vibrating source is represented in the overall excitation pattern along an array of neuromasts in the lateral line canal (e.g. Denton and Gray, 1982;Denton and Gray, 1983;Hassan, 1993;Coombs et al, 1996;Coombs and Conley, 1997a;Coombs and Conley, 1997b). A precise description, together with a quantitative interpretation, of such measured patterns that allows a reconstruction of the location and vibration direction of vibrating sources to be made is still lacking.…”

Section: Introductionmentioning

confidence: 99%

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Source location encoding in the fish lateral line canal

Ćurčić‐Blake

Netten

2006

Journal of Experimental Biology

105

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SUMMARY The position of a hydrodynamic dipole source, as encoded in a linear array of mechano-detecting neuromasts in the fish lateral line canal, was electrophysiologically investigated. Measured excitation patterns along the lateral line were compared to theoretical predictions and were found to be in good agreement. The results demonstrate that information on the position of a vibrating source from a fish is linearly coded in the spatial characteristics of the excitation pattern of pressure gradients distributed along the lateral line canal. Several algorithms are discussed that could potentially be used by a fish to decode lateral line excitation patterns, in order to localise a source and its axis of vibration. Specifically, a wavelet transform of a 1-D excitation pattern is shown to reconstruct a 2-D image of dipole sources located within a distance comparable to the body length of a fish and with a close range spatial accuracy twice the inter-neuromast distance.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Source location encoding in the fish lateral line canal

Ćurčić‐Blake

Netten

2006

Journal of Experimental Biology

105

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“…A constant flow velocity of the stimulus is obtained by progressively reducing the amplitude of vibration, as vibration frequency is increased. Hassan (1993) showed that the flow, generated by a vibrating sphere near the cast model of a blind fish has characteristic patterns that can be detected by distributed SN, provided the (potentially strong) effects of the boundary layer are accounted for; and by distributed CN if the effect of the orientation of the canal relative to the position of the sphere has been accounted for. Curcic-Blake (2006) used a teflon sphere with 5 mm diameter vibrating in a direction roughly parallel to a ruffe lateral line canal, 10 cm in length, at a frequency around 70 Hz, placed at distances of the order of 10 mm.…”

Section: Tracking Swimming Fishmentioning

confidence: 99%

Biomimetic Survival Hydrodynamics and Flow Sensing

Triantafyllou

Weymouth

Miao

2016

Annu. Rev. Fluid Mech.

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The fluid mechanics employed by aquatic animals in their escape or attack maneuvers, what we call survival hydrodynamics, are fascinating because the recorded performance in animals is truly impressive. Such performance forces us to pose some basic questions on the underlying flow mechanisms that are not in use yet in engineered vehicles. A closely related issue is the ability of animals to sense the flow velocity and pressure field around them in order to detect and discriminate threats in environments where vision or other sensing is of limited or no use. We review work on animal flow sensing and actuation as a source of inspiration, and in order to formulate a number of basic problems and investigate the flow mechanisms that enable animals develop their remarkable performance. We describe some intriguing mechanisms of actuation and sensing.

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“…This slip flow velocity was taken as the stimulus to the SNs, with the assumption that the cupular lengths were long enough to penetrate the viscous boundary layer along the fish's skin. More sophisticated potential flow solutions have been developed to calculate the slip flow velocity distribution (and pressure distribution) over idealized fish body geometry (Hassan, 1985;Hassan, 1992a;Hassan, 1992b;Hassan, 1993). All of these studies ignore the fact that the real flow has to satisfy the no-slip boundary condition at the fish skin due to viscosity, i.e.…”

Section: Introductionmentioning

confidence: 99%

Using computational fluid dynamics to calculate the stimulus to the lateral line of a fish in still water

Rapo

Jiang

Grosenbaugh

et al. 2009

Journal of Experimental Biology

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SUMMARY This paper presents the first computational fluid dynamics (CFD)simulations of viscous flow due to a small sphere vibrating near a fish, a configuration that is frequently used for experiments on dipole source localization by the lateral line. Both two-dimensional (2-D) and three-dimensional (3-D) meshes were constructed, reproducing a previously published account of a mottled sculpin approaching an artificial prey. Both the fish-body geometry and the sphere vibration were explicitly included in the simulations. For comparison purposes, calculations using potential flow theory (PFT) of a 3-D dipole without a fish body being present were also performed. Comparisons between the 2-D and 3-D CFD simulations showed that the 2-D calculations did not accurately represent the 3-D flow and therefore did not produce realistic results. The 3-D CFD simulations showed that the presence of the fish body perturbed the dipole source pressure field near the fish body, an effect that was obviously absent in the PFT calculations of the dipole alone. In spite of this discrepancy, the pressure-gradient patterns to the lateral line system calculated from 3-D CFD simulations and PFT were similar. Conversely, the velocity field, which acted on the superficial neuromasts (SNs), was altered by the oscillatory boundary layer that formed at the fish's skin due to the flow produced by the vibrating sphere (accounted for in CFD but not PFT). An analytical solution of an oscillatory boundary layer above a flat plate, which was validated with CFD, was used to represent the flow near the fish's skin and to calculate the detection thresholds of the SNs in terms of flow velocity and strain rate. These calculations show that the boundary layer effects can be important, especially when the height of the cupula is less than the oscillatory boundary layer's Stokes viscous length scale.

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Mathematical description of the stimuli to the lateral line system of fish, derived from a three-dimensional flow field analysis. III. The case of an oscillating sphere near the fish

Cited by 12 publications

References 21 publications

Source location encoding in the fish lateral line canal

Source location encoding in the fish lateral line canal

Biomimetic Survival Hydrodynamics and Flow Sensing

Using computational fluid dynamics to calculate the stimulus to the lateral line of a fish in still water

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