I have been invited to give a talk on fluid dynamics at Queens’ Mathematical Society this term. Details are yet to be decided, but the talk will be an introduction to fluids and a focus on boundary layers, including the mathematical notion of a singular limit.

While writing the talk, I thought it might be nice to have a little *fun* with it.

The flow of a | fluid is | governèd

By the interact-si | -on of | four main | forces:

Viscosity * gravity * inert-si- | -a and | pressure.

Depending on the context | one may | dominate an- | -other.In fast flows | or large | lengthscales

Inert-si- | -a is | domin- | -ant

These include many im- | -portant | contexts

Such as household plumbing * oil pipelines * submar- | -ines : and the | upper | atmosphere.Unfortunately * the | limit of | Reynolds number

Going to infinity | is a | singular | limit.

The behaviour of an in- | -viscid | fluid

Is quite different from | that of | one with low vis- | -cosity.