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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}
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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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