A COMSOL Multiphysics- Mathematics

AI Thread Summary
The discussion focuses on modeling the Radiative Transfer Equation (RTE) in COMSOL Multiphysics, particularly the challenges of defining the integral term related to scattering and establishing three-variable dependence on position, time, and direction vector. Users are encouraged to share specific problems and attempts to receive targeted assistance. It is suggested that handling the differential part as a PDE before incorporating the integral for scattering may not be effective. A resource link is provided for further guidance on accounting for radiation in participating media. The conversation emphasizes the importance of understanding the complexities of RTE for successful modeling.
shar333
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Mathematics module of COMSOL
Hi everyone, Has anyone tried to model Radiative Transfer equation on comsol? I am stuck at defining the integral term which includes scattering. Also , how do i make my functions have 3 variable dependence as RTE has dependence on position, time and direction vector
 
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Hi, @shar333; welcome aboard the Physics Forums -- can you please tell us the specifics of the problem that you're trying to solve, and show us your attempt at solving it? -- if you do that, and you're thereafter still encountering difficulties, we'll try to be of assistance . . .
 
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I want to model this equation
rte.PNG


I used Coefficient form PDE.
1628848642074.png

but i am not sure how to define s^ (direction vector)
not able to define the integration either.

how do i add integral terms to differential equations?

how can i make my function dependent on 3 variables(s, r and t)
 
shar333 said:
That makes a lot of sense. Thanks
After you've read it, please get back to us -- thanks . . .
 
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