Signatures of Chaos: A study in predictability of flows

This work explores predictability in atmospheric flows. A study on forecasting is conducted in the Lorenz [1963] model using several Data Assimilation techniques. Methods of statistically combining model forecasts with observations for prediction are tested for their performance, which readily extend to higher dimensional systems and are oft...

Time-Supersampling 3D-PIV Measurements by Vortex-in-Cell Simulation

Measurement rate limitations of time-resolved 3D-3C velocity measurements by tomographic PIV limit application of the technique to small measurement volumes and low speed flows (~10 m/s). To reduce the challenging repetition rate requirements historically set by the Nyquist criterion, in the present thesis work a novel method is proposed,...