3 citations · 5 across the 5 of their papers we have counts for
5 papers
Scalar Representation of 2D Steady Vector Fields
Holger Theisel, Michael Motejat, Janos Zimmermann +1
We introduce a representation of a 2D steady vector field by two scalar fields , , such that the isolines of correspond to stream lines of , an…
FTLE for Flow Ensembles by Optimal Domain Displacement
Janos Zimmermann, Michael Motejat, Christian Rössl +1
FTLE (Finite Time Lyapunov Exponent) computation is one of the standard approaches to Lagrangian flow analysis. The main features of interest in FTLE fields are ridges that represe…
On the Objectivity and Quasi-Objectivity of TSE and TRA
Holger Theisel, Anke Friederici, Tobias Günther
We analyze two recently-introduced flow measured that are based on a single trajectory only: trajectory stretching exponent (TSE) to detect hyperbolic (stretching) behavior, and tr…
Objective Flow Measures Based on Few Trajectories
Holger Theisel, Anke Friederici, Tobias Günther
Sparse trajectory data consist of a low number of trajectories such that the reconstruction of an underlying velocity field is not possible. Recently, approaches have been introduc…
Vortex Criteria can be Objectivized by Unsteadiness Minimization
Holger Theisel, Markus Hadwiger, Peter Rautek +2
Reference frame optimization is a generic framework to calculate a spatially-varying observer field that views an unsteady fluid flow in a reference frame that is as-steady-as-poss…