Next Article in Journal / Special Issue
Optimal Flow Sensing for Schooling Swimmers
Previous Article in Journal
Using a Convolutional Siamese Network for Image-Based Plant Species Identification with Small Datasets
Previous Article in Special Issue
Experiments and Agent Based Models of Zooplankton Movement within Complex Flow Environments

The Ground Effect in Anguilliform Swimming

J. Mike Walker ’66 Department of Mechanical Engineering, Texas A&M University, College Station, TX 77843, USA
Mechanical Engineering Program, University of Houston–Clear Lake, Houston, TX 77058, USA
Author to whom correspondence should be addressed.
Biomimetics 2020, 5(1), 9;
Received: 26 January 2020 / Revised: 26 February 2020 / Accepted: 27 February 2020 / Published: 3 March 2020
(This article belongs to the Special Issue Fluid Dynamic Interactions in Biological and Bioinspired Propulsion)
Some anguilliform swimmers such as eels and lampreys swim near the ground, which has been hypothesized to have hydrodynamic benefits. To investigate whether swimming near ground has hydrodynamics benefits, two large-eddy simulations of a self-propelled anguilliform swimmer are carried out—one swimming far away from the ground (free swimming) and the other near the ground, that is, midline at 0.07 of fish length (L) from the ground creating a gap of 0.04 L . Simulations are carried out under similar conditions with both fish starting from rest in a quiescent flow and reaching steady swimming (constant average speed). The numerical results show that both swimmers have similar speed, power consumption, efficiency, and wake structure during steady swimming. This indicates that swimming near the ground with a gap larger than 0.04 L does not improve the swimming performance of anguilliform swimmers when there is no incoming flow, that is, the interaction of the wake with the ground does not improve swimming performance. When there is incoming flow, however, swimming near the ground may help because the flow has lower velocities near the ground. View Full-Text
Keywords: fish locomotion; eel swimming; ground effect; self-propelled; simulation fish locomotion; eel swimming; ground effect; self-propelled; simulation
Show Figures

Figure 1

MDPI and ACS Style

Ogunka, U.E.; Daghooghi, M.; Akbarzadeh, A.M.; Borazjani, I. The Ground Effect in Anguilliform Swimming. Biomimetics 2020, 5, 9.

AMA Style

Ogunka UE, Daghooghi M, Akbarzadeh AM, Borazjani I. The Ground Effect in Anguilliform Swimming. Biomimetics. 2020; 5(1):9.

Chicago/Turabian Style

Ogunka, Uchenna E., Mohsen Daghooghi, Amir M. Akbarzadeh, and Iman Borazjani. 2020. "The Ground Effect in Anguilliform Swimming" Biomimetics 5, no. 1: 9.

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

Back to TopTop