Pol Grasland-Mongrain edited Simu disp maps.tex  over 8 years ago

Commit id: e9313058c73e589482b46c36690bdef718b5631f

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Displacement can again be computed by convoluting $G_z$ with the 4-D matrix H(x,y,z,t) of the applied force. We modeled here the vaporization as a point force directed along Z direction (so angle $\beta$ = 0) during 100 $\mu$s with a depth of 50 $\mu$m and increasing linearly from -2.5 to 0 mm and decreasing symmetrically from 0 to 2.5 mm (to approximate a Gaussian shape). The medium density $\rho$ was taken equal to 1000 kg.m$^{-3}$, the compression wave speed to 1500 m.s$^{-1}$ and the shear wave speed to 5.75 m.s$^{-1}$.  Results are shown on Figure \ref{Figure3} \ref{figGreenAbla}  which represents displacement maps between each frame along Z axis 0.8, 1.6, 2.4, 3.2 and 4.0 ms after force application. The displacement maps present many similarities with the experimental results of the Figure \ref{Figure2}.