The volume of a 2D mesh cell in a 3D geometry is the 2D area times the length of the geometry in the third dimension (i.e., wherever there could be a flux of neutrons). So, your calculation of (5/100) * (5/100) * 5 seems to be correct.
Best,
Paul
The volume of a 2D mesh cell in a 3D geometry is the 2D area times the length of the geometry in the third dimension (i.e., wherever there could be a flux of neutrons). So, your calculation of (5/100) * (5/100) * 5 seems to be correct.
Best,
Paul