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 January 29, 2015 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 January 29, 2015).

Share This


More From ScienceDaily



More Matter & Energy News

Thursday, January 29, 2015

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Tesla 'Insane Mode' Gives Unsuspecting Passengers the Ride of Their Life

Tesla 'Insane Mode' Gives Unsuspecting Passengers the Ride of Their Life

RightThisMinute (Jan. 29, 2015) — If your car has an "Insane Mode" then you know it&apos;s fast. Well, these unsuspecting passengers were in for one insane ride when they hit the button. Tesla cars are awesome. Video provided by RightThisMinute
Powered by NewsLook.com
Now Bill Gates Is 'Concerned' About Artificial Intelligence

Now Bill Gates Is 'Concerned' About Artificial Intelligence

Newsy (Jan. 29, 2015) — Bill Gates joins the list of tech moguls scared of super-intelligent machines. He says more people should be concerned, but why? Video provided by Newsy
Powered by NewsLook.com
Senate Passes Bill for Keystone XL Pipeline

Senate Passes Bill for Keystone XL Pipeline

AP (Jan. 29, 2015) — The Republican-controlled Senate has passed a bipartisan bill approving construction of the Keystone XL oil pipeline. (Jan. 29) Video provided by AP
Powered by NewsLook.com
Two Stunt Pilots Perform Incredibly Close Flyby

Two Stunt Pilots Perform Incredibly Close Flyby

Rumble (Jan. 29, 2015) — Two pilots from &apos;Escuadrilla Argentina de Acrobacia Aιrea&apos; perform an incredibly low altitude flyby stunt during a recent show exhibition in Argentina. Check it out! Video provided by Rumble
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