Subscribe free to our newsletters via your
. 24/7 Space News .


Subscribe free to our newsletters via your




















TECH SPACE
How to make porous materials dry faster
by Staff Writers
Washington DC (SPX) Mar 21, 2016


File image.

Water in, water out: such is the cycle of porous material. In some cases, like with soils, it is preferable to keep water in. In others, it makes better economic and ecological sense to have porous materials dry faster, e.g. in the paper industries or with plasterboard manufacturing.

Modeling how porous material retains water or dries up can be resolved by narrowing the focus down to a single porous channel; now, a team of physicists has uncovered subtle underlying effects. These include the local shape of the air and water interface, which, in turn, is influenced by the actual shape of the capillaries. Emmanuel Keita, a physicist from Paris-Est University, France, who is also affiliated with Harvard University, Massachusetts, USA, and colleagues have just published these results in EPJ E.

The drying or water-retention process cannot typically be observed directly due to the opacity of the material. In this study, the authors relied on a simple glass channel which is thin enough to reveal dominant capillary effects - and not just effects linked to waters' fluid nature - that make the water travel along the channel.

Using direct microscopic images, they observed the entire air-water interface throughout the capillary, which they then combined with ultra-precise mass measurements and numerical simulations.

The traditional assumption has been that drying is faster at the surface, since evaporation progresses from the surface down into the depth of the materials. However, this approach did not account for capillary pressure triggering water to move within pores. This study's simulations show that the drying rate changes according to the shape of the air-water interface located near the surface.

This implies that slight changes to the wetting conditions near the surface can significantly modify the drying rate. Improving drying time - or indeed water retention capabilities - could therefore be achieved by controlling the porous materials' microstructure.

Research paper: "Drying kinetics driven by the shape of the air/water interface in a capillary channel". E. Keita, S. A. Koehler, P. Faure, D. A. Weitz, P. Coussot (2016), Eur. Phys. J. E,39: 23, DOI 10.1140/epje/i2016-16023-8

.


Related Links
Springer
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
Smart clothing of the future will automatically adjust itself
Espoo, Finland (SPX) Mar 18, 2016
Smart clothing of the future will automatically adjust itself according to the wearer's actual needs VTT Technical Research Centre of Finland Ltd has developed new technology that takes care of the thermal, moisture and flow-technical behaviour of smart clothing. The temperature of smart clothing, for example, is automatically adjusted according to the wearer's individual needs. The techno ... read more


TECH SPACE
Earth's moon wandered off axis billions of years ago

Permanent Lunar Colony Possible in 10 Years

China to use data relay satellite to explore dark side of moon

NASA May Return to Moon, But Only After Cutting Off ISS

TECH SPACE
New Gravity Map Gives Best View Yet Inside Mars

ExoMars performing flawlessly

Opportunity Rover Goes Back Downhill

ExoMars probe imaged en route to Mars

TECH SPACE
British bacon sandwich en route to ISS tastes out of this world

NASA Selects American Small Business, Research Institution Projects for Continued Development

China regulator frowns on Anbang's hotel bids: report

Broomstick flying or red-light ping-pong? Gadgets at German fair

TECH SPACE
China's 1st space lab Tiangong-1 ends data service

China's aim to explore Mars

China to establish first commercial rocket launch company

China's ambition after space station

TECH SPACE
Unmanned Cygnus cargo ship launches to ISS on resupply run: NASA

Cygnus Set to Deliver Its Largest Load of Station Science, Cargo

Three new members join crew of International Space Station

Grandpa astronaut to break Scott Kelly's space record

TECH SPACE
MHI signs H-IIA launch deal for UAE Mars mission

Launch of Dragon Spacecraft to ISS Postponed Until April

ILS and INMARSAT Agree To Future Proton Launch

Soyuz 2-1B Carrier Rocket Launched From Baikonur

TECH SPACE
Most eccentric planet ever known flashes astronomers with reflected light

VLA shows earliest stages of planet formation

VLA observes earliest stages of planet formation

NASA's K2 mission: Kepler second chance to shine

TECH SPACE
3D-printed component flies in Trident missile tests

Tunable windows for privacy, camouflage

Saab showcases Sea Giraffe 1X air and surface naval radar

Wrangler Supercomputer speeds through big data




Memory Foam Mattress Review
Newsletters :: SpaceDaily :: SpaceWar :: TerraDaily :: Energy Daily
XML Feeds :: Space News :: Earth News :: War News :: Solar Energy News








The content herein, unless otherwise known to be public domain, are Copyright 1995-2016 - 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. 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. Privacy Statement All images and articles appearing on Space Media Network have been edited or digitally altered in some way. Any requests to remove copyright material will be acted upon in a timely and appropriate manner. Any attempt to extort money from Space Media Network will be ignored and reported to Australian Law Enforcement Agencies as a potential case of financial fraud involving the use of a telephonic carriage device or postal service.