Navigation Links
2 vortex trails with 1 stroke
Date:2/25/2013

RIVERSIDE, Calif. As of today, the Wikipedia entry for the hummingbird explains that the bird's flight generates in its wake a single trail of vortices that helps the bird hover. But after conducting experiments with hummingbirds in the lab, researchers at the University of California, Riverside propose that the hovering hummingbird instead produces two trails of vortices one under each wing per stroke that help generate the aerodynamic forces required for the bird to power and control its flight.

The results of the study could find wide application in aerospace technology and the development of unmanned vehicles for medical surveillance after natural disasters.

The researchers used high-speed image sequences 500 frames per second of hummingbirds hover-feeding within a white plume (emitted by the heating of dry ice) to study the vortex wake from multiple perspectives. They also used particle image velocimetry (PIV), a flow-measuring method used in fluid mechanics, to quantitatively analyze the flow around the hummingbirds. PIV allowed the researchers to record the particles surrounding the birds and extract velocity fields.

The films and velocity fields showed two distinct jets of downwards airflow one under each wing of the hummingbird. They also revealed that vortex loops around each jet are shed during each upstroke and downstroke.

The researchers therefore propose in their paper published online last month in the journal Experiments in Fluids that the hummingbird's two wings form bilateral vortex loops during each wing stroke, which is advantageous for maneuverability.

"Previous studies have indicated that slow-flying bats and faster flying birds produced different structures in their wakes," said

Contact: Iqbal Pittawala
iqbal@ucr.edu
951-827-6050
University of California - Riverside
Source:Eurekalert  

Page: 1 2 3

Related biology news :

1. Rice University lab show how blood vessels regroup after stroke
2. Medical societies unite on patient-centered measures for nonsurgical stroke interventions
3. Stem cells aid recovery from stroke
4. Disappearing bacterium may protect against stroke
5. Even the smallest stroke can damage brain tissue and impair cognitive function
6. Double duty: Immune system regulator found to protect brain from effects of stroke
7. Brain-wave-reading robot might help stroke patients
8. Reorganizing brain could lead to new stroke, tinnitus treatments
9. Study: In-patient, out-patient stroke rehab might benefit from yoga
10. Study finds soda consumption increases overall stroke risk
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
2 vortex trails with 1 stroke
(Date:10/29/2014)... German . ... Peter Schlögelhofer at the Max F. Perutz Laboratories (MFPL) ... of Vienna dived into the process of meiosis in ... an inversion of the standard meiotic phases. The researchers ... Nature Communications . , Meiosis is the two-step series ...
(Date:10/29/2014)... An innovative workflow reveals new research potential of the ... recently published article in the Biodiversity Data ... BOLD in tabular format and imported these into a ... Writting Tool (PWT). Data were used to study ... wasps from the Microgastrinae subfamily. , BOLD is originally ...
(Date:10/29/2014)... organisms in the living world compete with members ... in how much they invest into their competitive ... to get access to high-quality resources, while others ... of the lower-quality resources that are left over ... animal and human societies seems to fluctuate considerably ...
Breaking Biology News(10 mins):Meiotic cell division 'the other way round' 2Go straight and publish: From Barcode of Life Data Systems to scholarly publishing systems 2Evolution of competitiveness 2Evolution of competitiveness 3
... is taking the world on a 25-year non-stop research expeditioninto ... team of scientists and marine engineers are completing the installation ... largest and most advanced cabled ocean observatory. Using three ... five 13-tonne nodes and more than 400 instruments and sensors ...
... are the Holy Grails of nanotechnology, but nature has ... team of scientists has taken a unique look at ... assemble into clusters that direct cell movement to select ... into how complex periodic patterns in biological systems can ...
... The restoration of a 2,000-year-old bronze sculpture of the ... understand how to prevent metal corrosion, discover the safest ... perplexing problems. That,s the conclusion of a new study ... current issue of ACS, Crystal Growth & Design ...
Cached Biology News:World's largest ocean observatory takes shape 2World's largest ocean observatory takes shape 3Spontaneous assembly 2Spontaneous assembly 3Spontaneous assembly 4
(Date:10/27/2014)... -- Investor-Edge has initiated coverage on the ... ), Insmed Inc. (NASDAQ: INSM ), BioCryst ... (NASDAQ: DYAX ), and Oncothyreon Inc. (NASDAQ: ... accessed at: http://investor-edge.com/register . On Friday, ... up 0.69%, the Dow Jones Industrial Average advanced 0.76%, ...
(Date:10/26/2014)... October 26, 2014 The report "Protective ... Application - Global Trends & Forecast to 2019", defines ... and forecasting of volume consumed and value generated. The ... KT in 2014 to 6,701.3 KT by 2019, at ... Browse 91 market data tables and 22 figures spread ...
(Date:10/25/2014)... Los Angeles, California (PRWEB) October 23, 2014 ... VDRM ), a specialty pharmaceutical company devoted to ... pursuing out-licensing partnerships in 2015. , ViaDerma has ... method, which allows for rapid mass transfer of ... into the body to provide immediate localized therapy. ...
(Date:10/25/2014)... (PRWEB) October 24, 2014 According ... Market by Data Center Types (Colocation, Enterprise, Telecom), ... Types (Tier 1, Tier 2, Tier 3, Tier ... MarketsandMarkets, defines and segments the Data Center Construction ... and forecasting of revenues. This research report also ...
Breaking Biology Technology:Pre-market Equity Watch on Biotech Industry - Neurocrine Biosciences, Insmed, BioCryst Pharma, Dyax, and Oncothyreon 2Pre-market Equity Watch on Biotech Industry - Neurocrine Biosciences, Insmed, BioCryst Pharma, Dyax, and Oncothyreon 3Pre-market Equity Watch on Biotech Industry - Neurocrine Biosciences, Insmed, BioCryst Pharma, Dyax, and Oncothyreon 4Pre-market Equity Watch on Biotech Industry - Neurocrine Biosciences, Insmed, BioCryst Pharma, Dyax, and Oncothyreon 5Protective Coatings Market Poised to Reach $18,431.8 Million by 2019 - Report by MarketsandMarkets 2Protective Coatings Market Poised to Reach $18,431.8 Million by 2019 - Report by MarketsandMarkets 3Protective Coatings Market Poised to Reach $18,431.8 Million by 2019 - Report by MarketsandMarkets 4ViaDerma, Inc. Announces Plans to Pursue Out-Licensing Partnerships in 2015 2ViaDerma, Inc. Announces Plans to Pursue Out-Licensing Partnerships in 2015 3Data Center Construction Market Worth $22.73 Billion by 2019 - New Report by MarketsandMarkets 2Data Center Construction Market Worth $22.73 Billion by 2019 - New Report by MarketsandMarkets 3Data Center Construction Market Worth $22.73 Billion by 2019 - New Report by MarketsandMarkets 4
... HILL, N.C. , May 18 Patient ... educating the marketplace on new medicines. Effectively collaborating with ... treatment options and is especially critical for socially sensitive ... the Marketplace " is a 125-page report from Best ...
... May 18 Lentigen Corporation, a biotechnology ... gene delivery technologies, announced today that it has received ... transfer (STTR) grant for a program on "Lentiviral Gene ... with Dr. R. Scott McIvor Professor, Department of Genetics, ...
... ... build an enterprise-class, cross-channel B-to-B webstore for the company’s leading Pipetman® brand of ... CloudCraze eCommerce product, the new site will allow Gilson to provide an easily ... ...
Cached Biology Technology:Educating the Marketplace Through Collaborations with Patient Advocacy Groups 2Educating the Marketplace Through Collaborations with Patient Advocacy Groups 3Lentigen Awarded Phase I STTR Grant for Hunter Syndrome 2Lentigen Awarded Phase I STTR Grant for Hunter Syndrome 3Gilson, Inc. Selects EDL Consulting's CloudCraze For Cross-Channel Webstore Expansion in Europe 2Gilson, Inc. Selects EDL Consulting's CloudCraze For Cross-Channel Webstore Expansion in Europe 3
... Ciphergen's ProteinChip arrays have been ... from biological samples. A variety of ... of proteins according to their unique ... different spots, allowing side-by-side sample comparison, ...
... Assay with SR-101 Labeled Substrates (red ... Accurately measure serine protease activation • ... B-Bridge's FLISP Kits utilize cell-permeable, fluorescently ... to measure chymotrypsin-like activity in whole ...
... Leu-CMK FLISP Assay with FAM-Labeled Substrate ... • Accurately measure serine protease activation ... • B-Bridge's FLISP Kits utilize cell-permeable, ... (FLISPs) to measure chymotrypsin-like activity in ...
... instrument is the cycler that revolutionized ... uniformity and swappable blocks ensure consistent ... This rugged machine is more than ... for new features and upgrades as ...
Biology Products: