Featured Research

from universities, journals, and other organizations

New Technique Capable Of Investigating Ultra-Miniature Flow Fields

Date:
September 8, 1998
Source:
University Of Illinois At Urbana-Champaign
Summary:
A system for measuring fluid velocities on the scale of a single cell has been developed at the University of Illinois. The system, capable of measuring flow fields in micron-scale fluidic devices, utilizes an epifluorescent microscope, seed particles 100 to 300 nanometers in diameter, and an intensified CCD camera to record high-resolution particle-image fields.

CHAMPAIGN, Ill. -- A system for measuring fluid velocities on the scale of a single cell has been developed at the University of Illinois. The system, capable of measuring flow fields in micron-scale fluidic devices, utilizes an epifluorescent microscope, seed particles 100 to 300 nanometers in diameter, and an intensified CCD camera to record high-resolution particle-image fields.

Related Articles


"Over the past ten years, significant progress has been made in the development of microfluidic devices based on micro-electromechanical systems (MEMS) technologies," said David Beebe, a U. of I. professor of electrical and computer engineering and a researcher at the Beckman Institute for Advanced Science and Technology. "While the scientific community has witnessed an explosive surge of miniaturization schemes and designs, the measurement of fluid flow has not kept pace."

Since the flow passages of MEMS microfluidic devices have dimensions on the order of 1 to 100 microns, traditional flow-diagnostic tools cannot be used, Beebe said. To address this need, Beebe, research scientist Juan Santiago, professor of theoretical and applied mechanics Ronald Adrian, and colleagues Steve Wereley and Carl Meinhart at the University of California at Santa Barbara developed a micron-resolution particle image velocimetry (PIV) system capable of measuring miniature flow fields. The micro-PIV system is designed specifically for measuring velocity fields in bioanalysis systems where low-light level imaging is critical.

"Micro-PIV can be used to study the physics and performance of a wide range of fluid-flow devices including micro-flow sensors, micro-valves and micro-pumps," Santiago said.

Images of submicron fluorescent particles are magnified by a microscope and recorded with an intensified CCD camera. By analyzing sequential snapshots using statistical correlations, the researchers can track the motion of groups of particles, yielding fluid flow velocity vectors.

"We have currently refined the technique to provide velocity-field measurements with spatial resolutions approaching 1 micron," Santiago said.

Adrian is a leading developer of the PIV technique and has used it to study turbulence in larger-scale flow fields. By combining the PIV technique with epifluorescence microscopy and an intensified CCD camera, the researchers have opened a new door to making biological flow-field measurements. They will be implementing this technique in MEMS-based micro-pumps, miniature fluid mixers and sub-millimeter rocket nozzles.

The researchers describe the new measurement technique in the September issue of the journal Experiments in Fluids.


Story Source:

The above story is based on materials provided by University Of Illinois At Urbana-Champaign. Note: Materials may be edited for content and length.


Cite This Page:

University Of Illinois At Urbana-Champaign. "New Technique Capable Of Investigating Ultra-Miniature Flow Fields." ScienceDaily. ScienceDaily, 8 September 1998. <www.sciencedaily.com/releases/1998/09/980908073351.htm>.
University Of Illinois At Urbana-Champaign. (1998, September 8). New Technique Capable Of Investigating Ultra-Miniature Flow Fields. ScienceDaily. Retrieved November 26, 2014 from www.sciencedaily.com/releases/1998/09/980908073351.htm
University Of Illinois At Urbana-Champaign. "New Technique Capable Of Investigating Ultra-Miniature Flow Fields." ScienceDaily. www.sciencedaily.com/releases/1998/09/980908073351.htm (accessed November 26, 2014).

Share This


More From ScienceDaily



More Matter & Energy News

Wednesday, November 26, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

NASA's First 3-D Printer In Space Creates Its First Object

NASA's First 3-D Printer In Space Creates Its First Object

Newsy (Nov. 26, 2014) The International Space Station is now using a proof-of-concept 3D printer to test additive printing in a weightless, isolated environment. Video provided by Newsy
Powered by NewsLook.com
Bolivian Recycling Initiative Turns Plastic Waste Into School Furniture

Bolivian Recycling Initiative Turns Plastic Waste Into School Furniture

Reuters - Innovations Video Online (Nov. 26, 2014) Innovative recycling project in La Paz separates city waste and converts plastic garbage into school furniture made from 'plastiwood'. Tara Cleary reports. Video provided by Reuters
Powered by NewsLook.com
Blu-Ray Discs Getting Second Run As Solar Panels

Blu-Ray Discs Getting Second Run As Solar Panels

Newsy (Nov. 26, 2014) Researchers at Northwestern University are repurposing Blu-ray movies for better solar panel technology thanks to the discs' internal structures. Video provided by Newsy
Powered by NewsLook.com
Today's Prostheses Are More Capable Than Ever

Today's Prostheses Are More Capable Than Ever

Newsy (Nov. 26, 2014) Advances in prosthetics are making replacement body parts stronger and more lifelike than they’ve ever been. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Space & Time

Matter & Energy

Computers & Math

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins