William Pickard developed an elegant analytical solution to describe low-Reynolds-number flow in long cylindrical cells. This setup resembles the classic Couette flow, but in this case, the velocity depends on the angle and the radial position (normalized by the cell radius) buff.ly/RcuIAyW

It's #FluidsFriday, and we're featuring another sample from the hydrodramatic toy collection. A rising Taylor bubble generates a swirling flow inside a sealed cylindrical tube.

So much of our daily lives involves fluids moving from one place to another. It's great when it works. But sometimes it fails. A leak appears. A drop gets through. And then another.