The discussion centers on the differences between flux and current in the context of neutrons, specifically regarding their definitions, units, and calculations using MCNP (Monte Carlo N-Particle Transport Code). Participants explore both theoretical and practical aspects of these concepts.
Participants express varying definitions and interpretations of flux and current, indicating that multiple competing views remain. The discussion does not reach a consensus on the calculations or the specific context of the terms used.
Some assumptions about the definitions of current and flux may not be explicitly stated, and the discussion lacks clarity on the specific scenarios or conditions under which these calculations are to be performed.
Flux is a scalar value, while current is a vector, which has a direction.LeeGru said:Guys, I need to calculate the flux and current of neutron by MCNP.So what's the difference between them ,and How to calculate them?
I need to calculate the ratio between the total neutron current and the total neutron flux.How could obtain this value?Astronuc said:Flux is a scalar value, while current is a vector, which has a direction.
Is the question about neutron current (or particle current) or current density?
Thank you very much.I need to calculate the ratio between the total neutron current and the total neutron flux.How could I obtain this value in MCNPphyzguy said:Flux is a flow/area/time, so in the case of neutrons it would have units like neutrons/(cm^2 - sec). Current is a flow/time, so it would have units like neutrons/second. So the current will be the flux integrated over some surface. How you calculate theme depends on the problem given.