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miranda-meeks:

Ghosts of the sea.

miranda-meeks:

Ghosts of the sea.

ked27:

I found a rare Ground Jelly while gardening today. :)

ked27:

I found a rare Ground Jelly while gardening today. :)

fuckyeahfluiddynamics:

Yesterday we discussed some of the basic mechanics of a frisbee in flight. Although frisbees do generate lift similarly to a wing, they do have some unique features. You’ve probably noticed, for example, that the top surface of a frisbee has several raised concentric rings. These are not simply decoration! Instead the rings disrupt airflow at the surface of the frisbee. This actually creates a narrow region of separated flow, visible in region B on the left oil-flow image. Airflow reattaches to the frisbee in the image after the second black arc, and the boundary layer along region C remains turbulent and attached for the remaining length of the frisbee. Keeping the boundary layer attached over the top surface ensures low pressure so that the disk has plenty of lift and remains aerodynamically stable in flight. A smooth frisbee would be much harder to throw accurately because its flight would be very sensitive to angle of attack and likely to stall. (Image credits: J. Potts and W. Crowther; recommended papers by: V. Morrison and R. Lorentz)

fuckyeahfluiddynamics:

Yesterday we discussed some of the basic mechanics of a frisbee in flight. Although frisbees do generate lift similarly to a wing, they do have some unique features. You’ve probably noticed, for example, that the top surface of a frisbee has several raised concentric rings. These are not simply decoration! Instead the rings disrupt airflow at the surface of the frisbee. This actually creates a narrow region of separated flow, visible in region B on the left oil-flow image. Airflow reattaches to the frisbee in the image after the second black arc, and the boundary layer along region C remains turbulent and attached for the remaining length of the frisbee. Keeping the boundary layer attached over the top surface ensures low pressure so that the disk has plenty of lift and remains aerodynamically stable in flight. A smooth frisbee would be much harder to throw accurately because its flight would be very sensitive to angle of attack and likely to stall. (Image credits: J. Potts and W. Crowther; recommended papers by: V. Morrison and R. Lorentz)

fuckyeahfluiddynamics:

The mystery of the roaming rocks of Death Valley’s Racetrack Playa may be at an end. Since their discovery in the 1940s, researchers have speculated about what conditions on the playa could cause 15+ kg rocks to slide tens or hundreds of meters across the dry lakebed. But the rare nature of the movement and the remoteness of the location had prevented direct observation of the phenomenon until last December when a research team caught the rocks in motion (see the timelapse animation above or the source video). Winter rain and snow had created a shallow ice-encrusted pond across the playa by the time the researchers arrived to check their previously installed equipment. Late one sunny morning, the melting ice, only millimeters thick, cracked into plates tens of meters wide and began to move under the light breeze (~4-5 m/s). Despite its windowpane-like thickness, the ice pushed GPS-instrumented rocks up to hundreds of meters at speeds of 2-5 m/min. It took just the right mix of conditions—sun, wind, snow, and water—but the two ice-shoving instances the team observed go a long way toward explaining the sailing rocks. (Image credits: R. Norris et al.; J. Norris, source video; NASA Goddard; via Discover and SciAm)

fuckyeahfluiddynamics:

Atomization is the process of breaking a liquid into a spray of fine droplets. There are many methods to accomplish this, including jet impingement, pressure-driven nozzles, and ultrasonic excitement. In the images above, a drop has been atomized through vibration of the surface on which it rests. Check out the full video. As the amplitude of the surface’s vibration increases, the droplet shifts from rippling capillary waves to ejecting tiny droplets. With the right vibrational forcing, the entire droplet bursts into a fine spray, as seen in the photo above. The process is extremely quick, taking less than 0.4 seconds to atomize a 0.1 ml drop of water. (Photo and video credit: B. Vukasinovic et al.; source video)

Kinda feel like crying but I have no idea why?

a-night-in-wonderland
heytheretylerr:

WHAT KIND OF WIZARD FISH IS THIS

heytheretylerr:

WHAT KIND OF WIZARD FISH IS THIS

BBC
nemfrog:

Fig. 113. X-ray by Dr. Pancoast. 1916.

nemfrog:

Fig. 113. X-ray by Dr. Pancoast. 1916.

"

Please leave a message.
Call me when you can.

Please leave a message.
Call me when you want me again.

Please leave a message.
I don’t know if you’re screening these calls or sleeping. Either way, I’m aching. I guess three in the morning was a bad time to realize I still love you.

Please leave a message.
I’ve been telling our story. Slowly, bits and pieces. Not all of it. There are some things that I will lock inside me forever. If they knew everything, they could love you like I do. I don’t want anyone to be able to love you like I do. I am selfish and I miss you so much that breathing hurts.

Please leave a message.
You probably think I’m a psychopath, calling you like this. Will you kiss me again anyways?

Please leave a message.
My bed feels empty without you. This is not the first night or the last. It’s just lonelier than usual, I guess. Come back.

Please leave a message.
I listen to the ocean some days.
Others, I can’t help but to remember how you and I were a sinking ship.
It’s hard to tell which one of us made it to the lifeboat.

Please leave a message.
I’m sorry.
For calling so late,
for not liking your mother,
for leaving.

Please leave a message.
One last thing.
I’m sorry that I love you now.
I’m sorry that I ever did.

"

Voicemails I’ll leave you in the middle of the night. (via poppyflowerpoetry)

awwww-cute:


Found a new friend while making network changes

awwww-cute:

Found a new friend while making network changes

awwww-cute