View allAll Photos Tagged FluidDynamics
I think this officially brings this series to an end, it’s been fun!
Thanks a lot for all the visits and comments!
Proposed topological features for the FAITH model, as described by M. Tobak. Flow direction from top to bottom. Red points are nodes (flow is either entirely divergent or convergent) and blue points are saddles (divergent in one dimension and convergent in the other).
FAITH is an axisymmetric sinusoidal hill created for the purpose of taking extensive measurements, and then applying the findings to computational fluid dynamics (CFD) to achieve more accurate results.
It took a team of high-powered mechanical engineers from MIT, Virginia Tech and Princeton, but the mystery of how cats drink water has been solved!
So, "What's the big deal?" you say. They stick their tongues in water and draw it into their mouths.
Apparently, the mechanics behind it are much more complex than those practiced by cat's sloppier carnivore cousins, dogs, who form their tongues into a cup shape that they immerse into water in order to drink. MIT's Pedro Reis, and his colleagues at the other universities, found that cats bend their tongues forward, touching just the tip to the surface of water and then draw the tongue back, bringing with it a column of water into the mouth, which then snaps shut just before the water column has a chance to fall back through gravity. This happens four times a second, which is why it's hard for you to see.
Then I thought: (1) My camera can capture things faster than four times a second; and (2) I have a couple of captive research subjects at home on which to verify the engineer's findings.
So, this is my cat Bogie, who particularly likes the filtered water from my kitchen sink, making it easy to position him where my camera could capture the action. I used my fastest lens, cranked the ISO to 3200 (thus the noise apparent in this shot) and used my remote shutter to take shots at about 1/400th of a second. He's using just the tip of his tongue to draw the water in, just like findings say.
The New York Times describes the research, which the scientists think could one day help in designing so-called soft robots. The full scientific report, complete with differential equations describing the tongue mechanics, is available from Science magazine.
More water drop experimentation. Two drops again collide just as one is rebounding. Consistent timing is the key to capturing this brief event. Photoshop for levels, saturation and sharpening only.
©2010 David C. Pearson, M.D.
A Row of Hewlett Packard C-Class blade servers analysed using state-of-the-art CFD modeling techniques by Arup.
Seen along an abandoned mining road near Moab, Utah. This is just east of and below the visitors's center of Dead Horse Point State Park.
Flickr member w9jim (Jim Doss) and I were hiking on the road to see a water guzzler. This is one of the many interesting things we saw. I think the ripply rock is about four feet (1.2 m) long. Maybe Jim remembers the size better than I do.
Winter hike on the Falls Trail with my hiking and photography companion, Lori Deiter.
We hiked Glen Leigh (up to Shawnee Falls) and Ganoga Glen (up to Ganoga Falls). I quick-checked Adams Falls, but only snapped an iPhone pic of it.
Ricketts Glen State Park
Luzerne County, Pennsylvania
Wednesday, January 10th, 2018
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wakefield, massachusetts
may 1958
water rocket
part of an archival project, featuring the photographs of nick dewolf
© the Nick DeWolf Foundation
Image-use requests are welcome via flickrmail or nickdewolfphotoarchive [at] gmail [dot] com
André Boehman (center), Professor of Mechanical Engineering, leads a team that's working to improve high-fidelity computational fluid dynamics simulations and sensitivity studies used at U-M and beyond to understand how many infectious aerosol particles others in a classroom expect to inhale under various mitigation scenarios inside 1311 EECS on North Campus in Ann Arbor, MI on Monday, May 17, 2021.
Using a smoke machine and particle spectrometers, similar to work they've done for the U-M Dental School and Blue Bus, these experiments explore the impacts of different mitigation measures including occupancy limits, masks and increased ventilation.
Photo: Robert Coelius/University of Michigan Engineering, Communications & Marketing
The ship's propeller that we know today evolved from the Archimedes screw which was used to lift water. The artist has taken one of the transitional designs as the basis for a bronze sculpture (2001) at Cinnabar Wharf, Wapping, London Borough of Tower Hamlets.
(It is permitted to photograph sculpture permanently exhibited in a public place without infringing the original author's copyright). Image: Copyright ©2010 George Rex Photography.
We conducted some convection experiments at the Department of Physics, University of Torino. The main aim is to investigate the brine rejection process during sea ice freezing. This is a small tank for tests and we also made some movies with it.
The sinking water (blue) has density 1.028 g/cm^3; the top layer (clear) 1.027 g/cm^3; the bottom layer (yellow) 1.030 g/cm^3. The brown water indicates mixing between the blue and light water.
A schlieren image of a hair dryer and a ball trapped in the airflow by Bernoulli's law. This law of fluids states that faster moving fluids like air have a lower pressure. The shape of the airflow around the ball keep the ball positioned above the jet of hot air. The schlieren image identify areas of different temperature by using the change in the index of refraction of a fluid due to a change in temperature.
Surface flow mixing with nozzle flow. Low Reynolds number, overexpanded jet flow (just couldn't push the volume to make it realistic, so tried to at least get it to look good).
CORRECTION: This description previously stated that the flow was underexpanded, when it is actually overexpanded. I accidentally mixed these up because the nomenclature seems somewhat backwards for how the jet flow appears.
Baking up some 3d fluid simulation at work for some preproduction tests. We adopted blender 5 days ago in the office. It was great to go with opensource and never having to worry about keeping versions up to date, licenses and not having full access to the codes to write your own functions. Do give blender a go.
Here we have a rendered view which uses Zbuffer information for depth of field and glows to help make the droplets pop. Its great to be able to do it all in one app without having to deal with lost of scene information on exports.