Milestone 4: Aliasing

In the third milestone, you will run your second turbulence simulation. In this milestone, you will…

• …learn how to eliminate aliasing.

Make sure you have read and understood the chapter on discrete convolutions.

Aliasing

The simulations from milestone 3 likely suffer from aliasing errors. Correct aliasing with the $2/3$-rule.

Parameters

Run simulations with the same parameters as your simulations of milestone 3, but this time with aliasing correction. Plot the energy spectrum without and with aliasing correction.

Task summary

We ask you to provide the following results in your final report:

• Plot of the energy and the dissipation spectrum at 5 different times throughout your simulation; compare results with aliasing corrections and without