The fish’s unique way of swimming could improve deep-sea vehicles’ agility and fuel efficiency
Stingrays swim through water with such ease that researchers from the University at Buffalo and Harvard University are studying how their movements could be used to design more agile and fuel-efficient unmanned underwater vehicles.
The vehicles could allow researchers to more efficiently study the mostly unexplored ocean depths, and they could also serve during clean up or rescue efforts.
“Most fish wag their tails to swim. A stingray’s swimming is much more unique, like a flag in the wind,” says Richard Bottom, a UB mechanical engineering graduate student participating in the research.
Bottom and Iman Borazjani, UB assistant professor of mechanical and aerospace engineering, set out to investigate the form-function relationship of the stingray — why it looks the way it does and what it gets from moving the way it does.
They will explain their findings at the 66th Annual Meeting of the American Physical Society Division of Fluid Dynamics. Their lecture, “Biofluids: Locomotion III – Flying,” is at 4:45 p.m. on Sunday, Nov. 24, in Pittsburgh, Pa.
The researchers used computational fluid dynamics, which employs algorithms to solve problems that involve fluid flows, to map the flow of water and the vortices around live stingrays.
The study is believed to be the first time the leading-edge vortex, the vortex at the front of an object in motion, has been studied in underwater locomotion, says Borazjani. The leading-edge vortex has been observed in the flight of birds and insects, and is one of the most important thrust enhancement mechanics in insect flight.
The vortices on the waves of the stingrays’ bodies cause favorable pressure fields — low pressure on the front and high pressure on the back — which push the ray forward. Because movement through air and water are similar, understanding vortices are critical.
“By looking at nature, we can learn from it and come up with new designs for cars, planes and submarines,” says Borazjani. “But we’re not just mimicking nature. We want to understand the underlying physics for future use in engineering or central designs.”
Studies have already proven that stingray motion closely resembles the most optimal swimming gait, says Bottom. Much of this is due to the stingray’s unique flat and round shape, which allows them to easily glide through water.
Read more . . .
The Latest on: Stingray movement
Global Sun Protective Clothing Market 2018 – Coolibar, ExOfficio, The North Face, Nike, Columbia, Patagonia, REI ... - thestocknewsnow.com
November 13, 2018 - The complete research assessment of Global Sun Protective Clothing Market provides granular analysis of industry's new upgrades, censorious trends, current market pilots, challenges, and standardization and technical domain. This market research report ...
New small gin bar Jupiter opening on Keira Street, Wollongong - Illawarra Mercury
November 12, 2018 - Illawarra Steelers legend Michael Bolt and his former partner Alli Dawson – the duo behind Stingray, Five Islands Brewery, Metro, Brasserie and Pig Dog – have teamed up with daughter Zoe Bolt to open Juniper on Keira Street.
Your guide to Dubai Design Week: 10 things to do, try, see and eat - The National
November 11, 2018 - This year, the gallery will present two new limited edition, mechanical pieces by Apical Reform: Tornado, which, through the geometric positioning of circular metal rings, is able to capture the distinctive movement of its namesake; and Stingray, an ...
Kaia Kater to perform folk music at the Campus Theatre - Sunbury Daily Item
November 9, 2018 - Her sophomore album wove between songs that touched on social issues like the Black Lives Matter movement (“Rising Down,” “Paradise Fell”) and won a Canadian Folk Music Award, a Stingray Rising Star Award. It also sent Kater on an 18-month touring ...
5 reasons you need to plan a trip to the Cayman Islands right now - Miami.com
November 7, 2018 - But this summer my family and I set out to experience the real Cayman Islands and what we found instead was a reputable slice of the Caribbean where we could swim with stingrays, dine at farm-to-table restaurants and snorkel in gin-colored waters on ...
DJ Stingray is the future-focused selector at the helm of the electro renaissance - DJ Mag
November 7, 2018 - We'd had conversations about his philosophy, so I thought, 'Okay, I'm Stingray'. I was Stingray from that day on.” The Drexciya philosophy is based on an Afro-futurist narrative concept around the perpetual movement of a voyage, and an underwater ...
Judge Finds Memphis Illegally Spied on Activists - Courthouse News Service
October 29, 2018 - In his opinion, Judge McCalla said the city violated its consent agreement when it used its real-time crime center to search several social media sites for posts relating to the Black Lives Matter movement “because the information gathered related to ...
Welcome To The Bone Room - Science Friday
October 23, 2018 - When a swimmer wading in shallow waters accidentally steps on a hidden yellow stingray, the creature defensively swings a venomous barb, or spine, on the top of its tail and stings the leg. It's an intricate movement—one that Steve Huskey goes all the ...
Watch a Man Get Stung on the Penis by Stingray - TheInertia.com
September 8, 2018 - It will make you incapable of speaking, rational thought, or movement. The tip-whip, as the name infers, happens when the tip is whipped. The pain is similar to what a hot dog might feel (if hot dogs could feel) when the barbeque heats up enough to ...
The Local Movement to Curb Big Brother - CityLab
March 2, 2018 - Police departments increasingly own cell site simulators, or stingrays, to hack into cell phones. They can read license plates and monitor E-ZPass token usage to create a detailed picture of a person's driving route. In addition to Closed Circuit ...