Finite Difference Space Step

There is only one keyword associated with the finite difference space step section of the MHARNESS® input file. This keyword is listed below. • SPACE STEP

Each cable segment is assigned a finite difference space step (cell size). Ten cells per wavelength for the highest frequency (smallest wavelength) of interest is generally used as a guide for setting the spatial cell size. The space step can also be manually defined, or automatically computed from the time step value. The space steps can be different for different cable segments but are always constant within each individual segment.

When MHARNESS is employed within MHARNESS®, then the space step must be uniform over all MHARNESS conductors. Furthermore, EMA3D must employ a uniform cubic mesh. The MHARNESS space step is equal to the dimension of the cubic mesh edge.