|Time reversal of acoustic waves|
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To run the model, open
TR.pro with Gmsh.
This model showcases the time reversal of acoustic waves.
The principle of time reversal is to use the reversibility of the wave equation in non dissipative media to back-propagate a signal on the source that first emitted it. Time Reversal Mirrors (TRM), designed by Matthias Fink and his team in the 1990's, are composed of a large number of transducers which can play alternatively the role of emitters and receivers. Associated to a numerical treatment module, they are able to record a signal, time reverse it, and back propagate it into the medium. The applications are numerous, such as submarine communication or kidney stone destruction.
Several analyses are predefined: time reversal in free space or with randomly-distributed obstacles between the source and the TRM, using either a monochromatic or a broadband signal.
Model developed by @bthierry