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• Unsteady Flow Past a Cylinder - Physics Setup

# Unsteady Flow Past a Cylinder - Physics Setup

Authors: John Singleton and Rajesh Bhaskaran, Cornell University

# Physics Setup

#### Launch FLUENT.

(Double Click) Setup in "Unsteady Flow", the duplicate project. Select Double Precision, and if using a computer with multiple cores, select parallel, and set the number of cores to be used.

Then click OK

#### Transient

In this step here we will, tell FLUENT to solve for the unsteady flow. As you can see, by default FLUENT will solve for the steady flow.

Problem Setup > General. Set Time to Transient.

#### Specify Material Properties

To achieve a Reynolds number of 120, as required in the problem statement, we will change the material viscosity, to 8.333*10^-3 kg/m*s.

Problem Setup > Materials > Fluid > air > Create/Edit.... Set the viscosity to 8.333E-3 (kg/m*s). Click Change/Create.

Then click Close.

#### Save Project

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