Copyright (C) 2018 King Abdullah University Of Science and Technology
High-Performance Visualization Group
This directory contains the matlab code and test data to reproduce results presented in the work of Hadwiger et al. [1].
The code was tested with Matlab 2017b.
The script 'scriptOptimizeObserverField.m' computes an approximate observer Killing field u for a given input flow field v.
The script 'scriptResampleObservedField.m' resamples an input flow field v as it is seen through the approximate observer Killing field u, producing the observed field w_r for a given observation time r.
The output fields u and w_r are saved in raw binary format; float32 x,y,t ordered (x fastest).
To run the different experiments from the paper change the variable 'example' in scriptOptimizeObserverField and scriptResampleObservedField. The examples 'Cylinder2D' and 'ocean' require additional datasets. Download the data set archive, extract the archive and put it in the 'data' folder before running the examples.
The ocean data set is produced by SSALTO/DUACS, distributed by AVISO, with support from CNES, and made available in the work of Haller et al. [2]. The Cylinder2D data set was simulated by Tino Weinkauf [3], using the Free Software 'Gerris Flow Solver' [4].
@article{Hadwiger2019ObserverKillingFields,
title = {Time-Dependent Flow seen through Approximate Observer Killing Fields},
author = {Hadwiger, Markus and Mlejnek, Matej and Theu{\ss}l, Thomas and Rautek, Peter},
journal = {IEEE Transactions on Visualization and Computer Graphics (Proceedings IEEE Scientific Visualization 2018)},
year = {2019}
volume = {25},
number = {1},
pages = {to appear}
}
Peter Rautek [email protected]
Matej Mlejnek [email protected]
[1] Hadwiger, M., Mlejnek, M., Theussl, T., Rautek, P., Time-Dependent Flow seen through Approximate Observer Killing Fields. IEEE Transactions on Visualization and Computer Graphics (Proceedings IEEE Scientific Visualization 2018), 25(1), 2019.
[2] Haller, G., Hadjighasem, A., Farazmand, M., Huhn, F., Defining coherent vortices objectively from the vorticity. Journal of Fluid Mechanics, 795, 136-173, 2016.
[3] Weinkauf, T., Theisel H., Streak Lines as Tangent Curves of a Derived Vector Field. IEEE Transactions on Visualization and Computer Graphics (Proceedings Visualization 2010), 16(6), 1225-1234, 2010.
[4] Popinet, S., Free Computational Fluid Dynamics. ClusterWorld, 2(6), 2004.