News tagged with fluid
Amazing skin gives sharks a push
Shark skin has long been known to improve the fish's swimming performance by reducing drag, but now George Lauder and Johannes Oeffner from Harvard University show that in addition, the skin generates thrust, ...
Feb 09, 2012 |
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Scientists uncover new clues in the early diagnosis of Alzheimer's
(Medical Xpress) -- Scientists in Nottingham have found abnormal levels of seven different proteins in spinal fluid could act as markers for detecting Alzheimer’s disease.
Feb 08, 2012 |
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Scientists make strides toward fixing infant hearts
Researchers at Rice University and Texas Children's Hospital have turned stem cells from amniotic fluid into cells that form blood vessels. Their success offers hope that such stem cells may be used to grow ...
Feb 06, 2012 |
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Want to understand the fluid dynamics of the oceans and atmosphere? UCLA's got the video
(PhysOrg.com) -- Oceans and clouds, even the atmosphere itself, are in constant motion and can undergo dramatic fluctuations, like hurricanes, that lead to severe consequences. If you've ever ...
Feb 02, 2012 |
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Aero-engineers debut open-source fluid dynamics design application
Each fall at technical universities across the world, a new crop of aeronautical and astronautical engineering graduate students settle in for the work that will consume them for the next several years. For many, their first ...
Jan 24, 2012 |
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OU researchers to test 'quad porosity simulation' model for shale gas reservoirs
A University of Oklahoma interdisciplinary research team will field test a newly developed 'quad porosity model' for shale gas reservoirs in the next few months. The three-year, $1.5 million project was funded by the Research ...
Jan 11, 2012 |
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Chemical measurements confirm official estimate of 2010 Deepwater Horizon oil spill rate
By combining detailed chemical measurements in the deep ocean, in the oil slick, and in the air, NOAA scientists and academic colleagues have independently estimated how fast gases and oil were leaking during ...
Jan 09, 2012 |
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NJIT receives patent for new shunt to aid brain-injured patients
NJIT Professor Gordon Thomas and NJIT Research Professor Reginald Farrow, both in the department of physics, and NJIT alumnus Sheng Liu, formerly a doctoral student of both researchers and now an engineer at a biotech company, ...
Jan 03, 2012 |
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Scanadu developing a Medical Tricorder
(Medical Xpress) -- Do you remember the scenes from your favorite Star Trek episode where Dr. McCoy simple waves his scanner across an injured patient to diagnose the problem? Well, that technology may not ...
Jan 03, 2012 |
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Home monitoring may help manage and reduce costs for heart failure
(Medical Xpress) -- Heart failure affects 5.8 million people in the U.S. alone and is responsible for nearly 1 million hospitalizations each year, most resulting from a build-up of body fluid in the lungs and other organs ...
Medicine & Health / Cardiology
Jan 03, 2012 |
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Changes seen in cerebrospinal fluid levels before onset of Alzheimer dementia
Cerebrospinal fluid levels of Aβ42 appear to be decreased at least five to 10 years before some patients with mild cognitive impairment develop Alzheimer disease (AD) dementia whereas other spinal fluid levels seem to ...
Medicine & Health / Psychology & Psychiatry
Jan 02, 2012 |
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Shearing triggers odd behavior in microscopic particles
(PhysOrg.com) -- Microscopic spheres form strings in surprising alignments when suspended in a viscous fluid and sheared between two plates — a finding that will affect the way scientists think about ...
Dec 23, 2011 |
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CSF test can pick up Alzheimer's early
Analysis of the cerebrospinal fluid can detect whether a person has Alzheimer's disease before symptoms appear. Researchers at the Sahlgrenska Academy at the University of Gothenburg, Sweden, have studied biomarkers that ...
Dec 20, 2011 |
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Functionalized graphene oxide plays part in next-generation oil-well drilling fluids
Graphene's star is rising as a material that could become essential to efficient, environmentally sound oil production. Rice University researchers are taking advantage of graphene's outstanding strength, ...
Nanotechnology / Nanomaterials
Dec 08, 2011 |
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2 out of 3 medical students do not know when to wash their hands
Only 21 percent of surveyed medical students could identify five true and two false indications of when and when not to wash their hands in the clinical setting, according to a study published in the December issue of the ...
Dec 01, 2011 |
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Fluid
In physics, a fluid is a substance that continually deforms (flows) under an applied shear stress, no matter how small. Fluids are a subset of the phases of matter and include liquids, gases, plasmas and, to some extent, plastic solids.
In common usage, "fluid" is often used as a synonym for "liquid", with no implication that gas could also be present. For example, "brake fluid" is hydraulic oil and will not perform its required function if there is gas in it. This colloquial usage of the term is also common in medicine and in nutrition ("take plenty of fluids").
Liquids form a free surface (that is, a surface not created by the container) while gases do not. The distinction between solids and fluid is not entirely obvious. The distinction is made by evaluating the viscosity of the substance. Silly Putty can be considered to behave like a solid or a fluid, depending on the time period over which it is observed. It is best described as a viscoelastic fluid. There are many examples of substances proving difficult to classify. A particularly interesting one is pitch, as demonstrated in the pitch drop experiment currently running at the University of Queensland.
For more information about Fluid, read the full article at
Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
