Does FMESH in MCNP support spherical geometry with the TMESH tally?

In summary, a spherical FMESH in MCNP is a type of mesh tally used to calculate the flux and fluence of particles in a specific spherical region. It is defined by specifying center coordinates, radius, and number of cells and can tally various types of particles. While it can increase calculation time, it provides more detailed and accurate results for complex geometries.
  • #1
khary23
93
6
According to the manual FMESH only supports Cartesian or cylindrical geometry has there been any update to this or is that it?
 
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  • #3
Yes, I am using the TMESH tally. I was curious as to the FMESH would also work in spherical coordinates.
 

1. What is FMESH in MCNP and what is its purpose?

FMESH is a feature in the Monte Carlo N-Particle (MCNP) computer code that allows for the creation of a fine mesh tally on a specified surface or volume. It is used to calculate the flux of particles across a specific region of interest in a simulation.

2. Does FMESH support spherical geometry in MCNP?

Yes, FMESH does support spherical geometry in MCNP. This means that the user can specify a spherical surface or volume as the region of interest for the fine mesh tally.

3. What is the difference between FMESH and TMESH in MCNP?

FMESH and TMESH are both tallies in MCNP, but they differ in their purpose. FMESH is used to calculate the flux of particles across a specified region, while TMESH is used to calculate the average value of a physical quantity within a specified region.

4. Can FMESH and TMESH be used together in MCNP?

Yes, FMESH and TMESH can be used together in MCNP. This allows for a more comprehensive analysis of the simulation results, as both tallies provide different types of information.

5. Are there any limitations to using spherical geometry with the TMESH tally in FMESH?

Yes, there are some limitations to using spherical geometry with the TMESH tally in FMESH. The spherical region of interest must be completely contained within the mesh grid, and the mesh size must be smaller than the radius of the sphere. Additionally, the spherical region cannot intersect with other regions of interest or boundaries in the simulation.

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