Hello everyone,
I try to simulate the light diffusion providing from a scattering optical fiber. The source is a LASER light (about 630 nm) .
I define 3 geometries :
- the block which contains the light source
- the cylinder which represents the light source
- another cylinder around the source in order to model the absorption by an opaque material.
Then, 3 materials:
- "Silica glass"
- "human tissue"
- an opaque material like "aluminium", or "concrete" whatever... This is only just to see an impact on the light diffusion, to check my simulation.
I try to solve this 3D model with the Helmholtz equation (ref: www.atomic.physics.lu.se/filea...ation/MultiphysicsExercise.pdf ) with defining the light source as the boundaries diffusing part.
I perform the study and this is where I am confused. The opaque cylinder have none effect on the diffusing light and my data results are underestimated (about 10^-3 under the right value).
I think that I don't correctly understand how to define links between geometries and materials but I am not sure of this too.
Anyone can help me or give others ideas to circumvent my problem?
Thanks.
Clément DUPONT.
I try to simulate the light diffusion providing from a scattering optical fiber. The source is a LASER light (about 630 nm) .
I define 3 geometries :
- the block which contains the light source
- the cylinder which represents the light source
- another cylinder around the source in order to model the absorption by an opaque material.
Then, 3 materials:
- "Silica glass"
- "human tissue"
- an opaque material like "aluminium", or "concrete" whatever... This is only just to see an impact on the light diffusion, to check my simulation.
I try to solve this 3D model with the Helmholtz equation (ref: www.atomic.physics.lu.se/filea...ation/MultiphysicsExercise.pdf ) with defining the light source as the boundaries diffusing part.
I perform the study and this is where I am confused. The opaque cylinder have none effect on the diffusing light and my data results are underestimated (about 10^-3 under the right value).
I think that I don't correctly understand how to define links between geometries and materials but I am not sure of this too.
Anyone can help me or give others ideas to circumvent my problem?
Thanks.
Clément DUPONT.