Biomimetic Survival Hydrodynamics and Flow Sensing

Triantafyllou, Michael S.; Weymouth, Gabriel; Miao, Jianmin

doi:10.1146/annurev-fluid-122414-034329

Cited by 98 publications

(73 citation statements)

References 103 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Recent studies about the hydrodynamics of the burst swimming of cephalopods illustrate that in addition to the repulsive force created by the jet, this locomotion mode also depends on shape and volume variations of the body [13][14][15]. Specifically, when the lateral dimension of a cephalopod-like swimmer decreases, its added mass in the swimming direction will decrease with time, leading to an added-massrelated force of − d dt (m a V) = −ṁ a V − m aV (V is the instantaneous speed of the swimmer), in which the term F a = −ṁ a V provides additional thrust to the system since ṁ a < 0.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation of cephalopod-inspired locomotion with intermittent bursts

Zhu

2018

Bioinspir. Biomim.

View full text Add to dashboard Cite

Inspired by recent studies about the fluid dynamics of cephalopods in their escaping swimming mode, we propose a novel design of an underwater propulsion system using a deformable body with pressure chamber, which propels itself in burst-coast cycles through a combined effect of pulsed jet and added-mass related thrust. To investigate the performance of this system we create a freeswimming computational model-the body deformation is prescribed yet the forward motion is driven by hydrodynamic forces. Our focus is on a single bursting cycle, which corresponds to the case that the system rests between bursts. The results can also be applied to the starting stage of a continuous cruising motion. A numerical model using the boundary element method is developed to computationally study the swimming process and the dynamic characteristics of this system. The results show that in the bursting phase its peak speed depends on the size of the body, the deformation time, the amount of volume change during the deformation, and the size of the nozzle where the jet flow is generated. The optimal speed is found to coincide with the critical formation number, indicating that the formation of vortex rings in the wake plays a pivotal role in the dynamics of the system. The dynamics of the system in the coasting phase and the process of refilling the pressure chamber are also studied.

show abstract

Section: Introductionmentioning

confidence: 99%

Numerical investigation of cephalopod-inspired locomotion with intermittent bursts

Zhu

2018

Bioinspir. Biomim.

View full text Add to dashboard Cite

show abstract

“…Structures of similar aspect ratio to filiform papillae used to sense external fluid stresses have already been described in the animal kingdom. Theses include primary cilia at the cellular level [11] or superficial neuromasts in the fish lateral line [12,13]. To function in a similar manner filiform papillae would need to bend significantly under typical in-mouth flows.…”

Section: Introductionmentioning

confidence: 99%

Sensing in the Mouth: A Model for Filiform Papillae as Strain Amplifiers

2016

View full text Add to dashboard Cite

Texture perception of foods is a common yet remarkably unstudied biophysical problem. Motivated by recent experiments reporting the presence of corpuscular endings in tongue filiform papillae, we develop in this work a mechanical model of the human tongue covered with filiform papillae in the form of elastic beams. Considering the typical flows that occur in the mouth during oral evaluation of Newtonian liquids, we suggest that filiform papillae may act either as direct strain sensors and/or as indirect strain amplifiers for the underlying mucosal tissue. Application of this model may also be valid for other biological appendages, such as primary cilliae and superficial neuromasts.

show abstract

“…The effectiveness and versatility of the lateral line organ inspired several bio-inspired artificial flow sensors [26][27][28][29]. Arranging these sensors in arrays on artificial swimmers has attracted attention to transform underwater sensing [30][31][32][33][34][35][36][37][38]. Here, leveraging the intelligent distributed sensing inspired by the lateral line showed to be effective in robots moving in aquatic environments [39][40][41].…”

Section: Introductionmentioning

confidence: 99%

Optimal Sensing for Fish School Identification

Weber¹,

Arampatzis²,

Novati³

et al. 2019

Preprint

View full text Add to dashboard Cite

Fish schooling implies an awareness of the swimmers for their companions. In flow mediated environments, in addition to visual cues, pressure and shear sensors on the fish body are critical for providing quantitative information that assists the quantification of proximity to other swimmers. Here we examine the distribution of sensors on the surface of an artificial swimmer so that it can optimally identify a leading group of swimmers. We employ Bayesian experimental design coupled with two-dimensional Navier Stokes equations for multiple self-propelled swimmers. The follower tracks the school using information from its own surface pressure and shear stress. We demonstrate that the optimal sensor distribution of the follower is qualitatively similar to the distribution of neuromasts on fish. Our results show that it is possible to identify accurately the center of mass and even the number of the leading swimmers using surface only information.

show abstract

Biomimetic Survival Hydrodynamics and Flow Sensing

Cited by 98 publications

References 103 publications

Numerical investigation of cephalopod-inspired locomotion with intermittent bursts

Numerical investigation of cephalopod-inspired locomotion with intermittent bursts

Sensing in the Mouth: A Model for Filiform Papillae as Strain Amplifiers

Optimal Sensing for Fish School Identification

Contact Info

Product

Resources

About