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The purpose of this tutorial is to illustrate the setup and solution of an unsteady flow past a circular cylinder and to study the vortex shedding phenomenon. Flow past a circular cylinder is one of the classical problems of fluid mechanics. For this problem, we will be looking at Reynolds number of 150.

{latex}Wiki Markup |
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Latex |

```
\large
$$
{Re} = {\rho VD \over \mu}
$$
{latex}
``` |

We know D = 2 m. To obtain *Re* = 150, we can arbitrarily set ρ, *V* and μ. For our case, let's set ρ = 75 kg/m ^{3} , *V* = 1 m/s and μ = 1 kg/ms.

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