Hi All,
I want to compare my Monte Carlo simulaiton results to available anlytical solution. My target is light intensity at the top surface.
I use Farrell's relationship to describe light intensity as a function of radius from the light source.
When run MC simulations using the same optical properties as the analytical solution for a simple semi-infinite homogeneous medium results are not matched.
In MC I have the number of photons through which I can play with power. But analytical solution doesn't represent any term for power, I think it would be the ratio of output to input intensity.
Anyway, what do I need to do for this comparison? I am using a mesh based MC package (TIM-OS).
What physical quantity is represented by MC simulation? Photon fluence, energy fluence, number of photons per area?? How can I scale based on power? I am using a point light source.
Any help is greatly appreciated.
Thank you.
Hello Amir Borumand!
Monte Carlo simulation estimate reflectance, absorbance and transmittance from the turbid media in the unit of fraction of incident photon. In analytical solution reflectance, absorbance and transmittance are estimated in the unit of fraction incident intensity. A slight variation between these two units is usually neglected.
Hi Einstein ,
Thanks very much for answer.
Could you also please guide me how absorbance could be calculated?
As you said Monte Carlo is based on counting photons.
And about intensity , isn't it just photons per area?
Thanks again for reply.
You are right, you can compare the fraction of incident intensity with the fraction of incident photons per unit area. In Monte Carlo simulation, the number of absorbed photons in every grid is usually estimated. The fraction of incident photons absorbed in the sample is absorbance.
One of our research is here.
Conference Paper Relay-Assisted Optical Wireless Communications in Turbid Water
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