Research on flow field decomposition - towards data reduction

A novel numerical scheme was developed for the empirical wavelet transformation (EWT) of numerically simulated data fields. This method decomposes the flow field into multiple scales, whose essential dynamics can be further extracted by modal decomposition methods.

The comparison of EWT with other flow decomposition methods (e.g. Proper Orthogonal Decomposition / POD and Dynamic Modal Decomposition / DMD) is demonstrated using a boundary layer flow.