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New developments in assessing fluid flows
July 03, 2002Scientists at Oxford University are developing a new Doppler Global Velocimetry (DGV) technique that will enable three-dimensional fluid velocity fields to be imaged reliably and accurately.
Over the last twenty years, a number of techniques have been explored to enable clear imaging of fluid flows, with the most advantageous being those that are non-intrusive. To date, one of the most important techniques has been particle image velocimetry (PIV). However, there is a major disadvantage with using PIV because considerable off-line processing is necessary to deconvolve the double image into a velocimetry field and three-dimensional information is difficult to retrieve.
In order to improve this technique, researchers in the Department of Engineering Science at Oxford University have developed the Doppler Global Velocimetry (DGV) technique that enables three-dimensional imaging of fast fluid flows in both an efficient and reliable manner.
The system is being developed with a number of significant modifications to specifically increase the reliability and accuracy of the measurements. In particular only one camera shot is now necessary, data processing is much easier, the imaging optics do not need to be as rigorous and three-dimensional information is more readily available.
The system has already been used successfully for a number of applications, including the imaging of gas flows in applications similar to those over gas turbine blades and in gas jets. Isis Innovation, Oxford University's technology transfer company, still has opportunities available for companies interested in utilising this system in other applications.
Isis Innovation Ltd
Aging News and Current Aging Events RSSGene associated with pair-bonding in animals has similar effects in human males
Variation in the gene for one of the receptors for the hormone vasopressin appears to be associated with how human males bond with their partners, according to an international team of researchers.
Experts Establish Baseline for Civic Engagement Among Retirees
The rise of retired people seeking active participation in their communities has led researchers to define this new aspect of American life. As a result, civic engagement can now be considered a distinct retirement role.
Age-related memory loss tied to slip in filtering information quickly
Scientists have identified a way in which the brain's ability to process information diminishes with age, and shown that this break down contributes to the decreased ability to form memories that is associated with normal aging.
Study finds B-vitamin deficiency may cause vascular cognitive impairment
A deficiency of B-vitamins may cause vascular cognitive impairment, according to a new study. Researchers at the Jean Mayer USDA Human Nutrition Research Center on Aging (HNRCA) at Tufts University used an experimental model to examine the metabolic, cognitive, and microvascular effects of dietary B-vitamin deficiency.
Clearing the airways in cystic fibrosis
By manipulating the machinery used by our cells for quality control, researchers from the University of Pittsburgh have found a way to restore the function of cystic fibrosis (CF) airway cells.
Why do eyelids sag with age? UCLA study answers mystery
Many theories have sought to explain what causes the baggy lower eyelids that come with aging, but UCLA researchers have now found that fat expansion in the eye socket is the primary culprit.
Hospice and palliative medicine specialty strives to prepare physicians for aging baby boomers
The American Academy of Hospice and Palliative Medicine announces two important medical education courses in hospice and palliative medicine and a significantly revised book series in keeping with the Academy's ongoing commitment to prevent and relieve pain and suffering during serious illness.
Research Finds America's Elderly Suffering Abuse
A new study concludes that nearly 13 percent of America's aged citizens suffer some form of abuse. Specifically, nine percent of adults reported they have suffered from verbal mistreatment, 3.5 percent suffer financial mistreatment, and 0.2 percent suffer physical mistreatment.
Researchers discover how rheumatoid arthritis causes bone loss
Researchers have discovered key details of how rheumatoid arthritis (RA) destroys bone, according to a study published in the Aug. 22 edition of the Journal of Biological Chemistry.
Researchers discover scent of skin cancer
According to new research from the Monell Center, odors from skin can be used to identify basal cell carcinoma, the most common form of skin cancer. The findings, presented at the 236th meeting of the American Chemical Society, may open doors to development of new methods to detect basal cell carcinoma and other forms of skin cancer.
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