. 24/7 Space News .
TECH SPACE
Cavitation intensity enhanced using pressure at bubble collapse region
by Staff Writers
Sendai, Japan (SPX) May 05, 2016


This image shows hydrodynamic cavitation through a venturi tube. Image courtesy Hitoshi Soyama. For a larger version of this image please go here.

Researchers at Tohoku University are developing a method to improve the aggressive intensity of cavitation without the need to increase the input power.

Cavitation - the formation, growth and subsequent collapse of microbubbles - produces high, localized energy which can be used in chemical processes for treating water and the pretreatment of biomass.

The research team found that the conventional cavitation method of applying ultrasonic energy was not strong enough, so they proposed using hydrodynamic cavitation instead.

In the proposed method, test water is passed through a constriction tube. Hydrodynamic cavitation is then produced by the decrease of pressure due to the increase of flow velocity.

The team found that the aggressive intensity of hydrodynamic cavitation was optimized with an increase of pressure at the bubble collapse region.

Although most researchers believe that an enlarged cavitation area produces aggressive intensity, by contrast, it seems a rise in aggressive intensity can occur with a reduced cavitation area. In the research experiments, the size of the cavitating region was reduced by varying the upstream and downstream pressures.

The team has demonstrated the enhancement of cavitation aggressive intensity by a factor of about 100 by optimizing pressure at the region, measuring acoustic power at cavitation bubble collapse, and luminescence as a function of the pressure.

This method can be useful for practical applications, as it does not need additional power, but the aggressive intensity can be increased simply by controlling a valve downstream to the cavitating region.


Thanks for being here;
We need your help. The SpaceDaily news network continues to grow but revenues have never been harder to maintain.

With the rise of Ad Blockers, and Facebook - our traditional revenue sources via quality network advertising continues to decline. And unlike so many other news sites, we don't have a paywall - with those annoying usernames and passwords.

Our news coverage takes time and effort to publish 365 days a year.

If you find our news sites informative and useful then please consider becoming a regular supporter or for now make a one off contribution.
SpaceDaily Contributor
$5 Billed Once


credit card or paypal
SpaceDaily Monthly Supporter
$5 Billed Monthly


paypal only


.


Related Links
Tohoku University
Space Technology News - Applications and Research






Comment on this article via your Facebook, Yahoo, AOL, Hotmail login.

Share this article via these popular social media networks
del.icio.usdel.icio.us DiggDigg RedditReddit GoogleGoogle

Previous Report
TECH SPACE
ORNL researchers discover new state of water molecule
Oak Ridge TN (SPX) Apr 29, 2016
Neutron scattering and computational modeling have revealed unique and unexpected behavior of water molecules under extreme confinement that is unmatched by any known gas, liquid or solid states. In a paper published in Physical Review Letters, researchers at the Department of Energy's Oak Ridge National Laboratory describe a new tunneling state of water molecules confined in hexagonal ult ... read more


TECH SPACE
First rocket made ready for launch at Vostochny spaceport

Supernova iron found on the moon

Russia to shift all Lunar launches to Vostochny Cosmodrome

Lunar lava tubes could help pave way for human colony

TECH SPACE
Opportunity completes mini-walkabout

Curiosity Mars Rover crosses rugged plateau

Mars' surface revealed in unprecedented detail

Space X's Red Dragons to start Mars exploration in 2018

TECH SPACE
US to move more assets into deep space over next 4 years

Simulators give astronauts glimpse of future flights

When technology bites back

Menstruation in spaceflight: Options for astronauts

TECH SPACE
China can meet Chile's satellite needs: ambassador

China launches Kunpeng-1B sounding rocket

South China city gears up for satellite tourism

China's long march into space

TECH SPACE
Russia delays space crew's return to Earth

15 years of Europe on the International Space Station

US-Russia Space Projects Set Example of Good Cooperation

Russia, US discuss boosting efficiency of cooperation at ISS

TECH SPACE
Vector Space Systems aims to redefine space commerce

Spaceport Camden Partners with NASA Innovation Competition

SpaceX vows to send capsule to Mars by 2018

Russia May Launch Upgraded Proton-M Rocket on May28

TECH SPACE
On the Road to Finding Other Earths

Kepler spacecraft recovered and returned to the K2 Mission

Lone planetary-mass object found in family of stars

University of Massachusetts Lowell PICTURE-B Mission Completed

TECH SPACE
Exploring phosphorene, a promising new material

It takes more than peer pressure to make large microgels fit in

Folding molecules into screw-shaped structures

Augmented games can increase the diversity of sports









The content herein, unless otherwise known to be public domain, are Copyright 1995-2024 - Space Media Network. All websites are published in Australia and are solely subject to Australian law and governed by Fair Use principals for news reporting and research purposes. AFP, UPI and IANS news wire stories are copyright Agence France-Presse, United Press International and Indo-Asia News Service. ESA news reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. All articles labeled "by Staff Writers" include reports supplied to Space Media Network by industry news wires, PR agencies, corporate press officers and the like. Such articles are individually curated and edited by Space Media Network staff on the basis of the report's information value to our industry and professional readership. Advertising does not imply endorsement, agreement or approval of any opinions, statements or information provided by Space Media Network on any Web page published or hosted by Space Media Network. General Data Protection Regulation (GDPR) Statement Our advertisers use various cookies and the like to deliver the best ad banner available at one time. All network advertising suppliers have GDPR policies (Legitimate Interest) that conform with EU regulations for data collection. By using our websites you consent to cookie based advertising. If you do not agree with this then you must stop using the websites from May 25, 2018. Privacy Statement. Additional information can be found here at About Us.