Releasing light from a moving particle in solution?

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Hello, I'm attempting to model light emission from a phosphorescent particle in a fluid flow. The flow and the particle motion are no problem. Modeling the release of light however is proving to be difficult. My thought was to solve the fluid flow in a stationary manner, then use a segregated solver to first update the position of the particle within the fluid, followed by updating the position of the ray release point based on that new particle position. And that's where I'm stuck and am open to suggestions. Thanks.


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