Nearfield calculations with multiple planewaves http://ddscat.wikidot.com/forum/t-5940450/nearfield-calculations-with-multiple-planewaves Posts in the discussion thread "Nearfield calculations with multiple planewaves" - Interested if there is a way to perform scattering calculations using multiple planewaves. As in an object in a counter-propagating field. Wed, 10 Jun 2026 08:32:05 +0000 http://ddscat.wikidot.com/forum/t-5940450#post-3801166 Re: Nearfield calculations with multiple planewaves http://ddscat.wikidot.com/forum/t-5940450/nearfield-calculations-with-multiple-planewaves#post-3801166 Tue, 15 May 2018 15:24:43 +0000 Damenpurt 4064164 I see. Thank you for the answer!

]]> http://ddscat.wikidot.com/forum/t-5940450#post-3800459 Re: Nearfield calculations with multiple planewaves http://ddscat.wikidot.com/forum/t-5940450/nearfield-calculations-with-multiple-planewaves#post-3800459 Tue, 15 May 2018 01:25:22 +0000 draine 87618 If the two plane wave sources are incoherent, then the scattered power, absorbed power, forces, and torques, can be obtained by simply summing the results calculated for single plane waves from the appropriate directions.
If the two plane wave sources are coherent (with one another) then the problem is more complicated. Subroutine EVALE (evale.f90) can be modified to provide whatever incident wave is desired, but a number of other modifications would be required to pass parameters to EVALE, and the total extinction cross section can no longer be evaluated using the optical theorem as DDSCAT does now.

]]> http://ddscat.wikidot.com/forum/t-5940450#post-3800373 Nearfield calculations with multiple planewaves http://ddscat.wikidot.com/forum/t-5940450/nearfield-calculations-with-multiple-planewaves#post-3800373 Mon, 14 May 2018 23:57:24 +0000 Damenpurt 4064164 I am a very new user of DDSCAT, I am primarily interested in nearfield calculations and scattering forces on spherical particles. It would be very useful if there was an ability to also calculate these under two planewave sources each with their own propagation direction. Does DDSCAT support this type of calculation? If not, does anyone have any advice for me if I wish to get this done? (i.e. is there another code that already does this, or is it possible to make simple modifications to pre-existing code).

Thanks in advance!

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