Reply To: Different timestep leading to different results

[Karthik Remella]

Hello The radiation estimated by the MC model depends on the random generation of photons in your simulation. If the number of target history is small and inadequate, you will tend to get a 'speckled' radiation field. Please check if this is true for your simulation. If this were true, then increasing the number of target history makes sense to get a smooth field.
Regarding your time step - did you calculate the time scales in your problem? You need to ensure that the time step you are selecting is smaller than the physical time scales in your problem. For example, if you were solving a conduction problem, your time step should be smaller than L^2/(\Alpha). '\Alpha' is the diffusivity of the material. This would be one way to make sure you are solving for the physics right.
Karthik