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[RF module, Mie scattering Problem] Why is time averaged power flow still dependent on time (or phase)?

Posted 2014年3月26日 GMT-4 08:18 RF & Microwave Engineering, Modeling Tools & Definitions, Parameters, Variables, & Functions, Results & Visualization Version 4.3b, Version 4.4 0 Replies

Song
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Hello everyone,

Thanks in advance for any response and comments on the following problem I met in my modeling:

In my simulation of light scattered off gold nanoparticles, after computing the scattered fields, I made slice plots of power flow to see how the power is transported. I also changed the phase of solution to view the solution at different angles (phase), and you can find in the attachment where I changed the phase of solution. I found that while ewfd.Poavx (y, z) is invariant with changing of phase, which is also consistent with physics, the quantity ewfd.relPoavx (y, z) is changing upon changing of phase, which is contradictory to physics.

In COMSOL, all these quantities are predefined where ewfd.Poavx (y, z) is called "Power flow, time average, x (y ,z) component" and emw.relPoavx (y, z) is called "Power flow of the relative fields, time average, x (y, z) component", respectively. My question is, if all these quantities are already time averaged, why are they still dependent on phase? It seems that COMSOL deals correctly with the power flow of total fields (ewfd.Poavx (y, z)), but it may do something wrong with the power flow of relative fields or scattered fields (emw.relPoavx (y, z)).

Does anyone have some clue to solve this? Any suggestion is welcome.

Thanks a lot,
Song
0 Replies Last Post 2014年3月26日 GMT-4 08:18
COMSOL Moderator

Hello Song

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