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geodynamics / sw4

SW4 (Seismic Waves, 4th order) implements substantial capabilities for 3-D seismic modeling, with a free surface condition on the top boundary, absorbing super-grid conditions on the far-field boundaries, and an arbitrary number of point force and/or point moment tensor source terms.
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Statistical distribution of the random field, theta, in 'randomize' command #78

Open swasti-saxena opened 4 years ago

swasti-saxena commented 4 years ago

Hello everybody,

I am using the 'randomize' command to introduce velocity perturbations into my model and would appreciate more literature on the statistical distribution of the random field generated. Is it Gaussian? Von Karman? The latest version, 2.0, gives a little more control to the user by specifying the 'stdthreshold' parameter, but I would like to dig deeper and get a theoretical understanding of the controlling parameters.

Thanks a lot!

bjorn2 commented 4 years ago

Hello, We have replaced the 'randomize' command by an improved random material capability, callled 'randomblock'. However, the new command has not yet made it into the master branch of sw4. If you are interested in random material, we recommend that you check out the developer branch of sw4. You can find documentation of 'randomblock' in section 11.3.10 in SW4-UsersGuide.pdf of the developer branch. Bjorn

swasti-saxena commented 4 years ago

Excellent! The new command is exactly what I needed. If you could provide a little more information on the correlation function that was being used in the 'randomize' command to reference it in the work that I have already done, that would be great. It would be nice to do a comparative study instead of just replacing the old work. Greatly appreciate the help! Swasti