fluid dynamics

Engineering Fluids at the Nanoscale

Video

Vortices in my coffee and the Perpetual Ocean

Image

In a previous post I shared a video on mixing and unmixing of fluids. This time I share with you an image I took of my coffee. With some milk fluid dynamics created amazing vortices. Following it is an animation of the time evolution of the vortices.

Milk vortices.jpg
“Milk vortices” by Astrobob – Own work. Licensed under CC BY-SA 4.0 via Commons.

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Physics for Fun – Mixing and Unmixing Colors in a Fluid

Video

Most of us know that when you mix two substances together there’s no way of returning them to their original state. For example mixing some colors in water

This is true for non-viscous fluids. On the other hand, if the same thing is done with glycerine you will be able to return the fluids to their original state before mixing by simply un-mixing the fluids. This can happen because, unlike water, glycerine is a viscous fluid. The video below demonstrates this interesting phenomenon.