FE-Mesh for a Simple Hexahedral Domain

Relatively simple three-dimensional transport domains can be defined using modified hexahedrals. Hexahedral domains must have similar properties as rectangular domains in that they are defined by vertical planes at the sides, a horizontal plane (possibly with a certain slope) at the bottom boundary, and with only the upper boundary not having to be a plane. The discretization of the hexahedral domain is then defined in the Hexahedral Domain Discretization dialog window. One needs to specify the number of nodes (Count) on the horizontal (Horizontal Discretization in X, Horizontal Discretization in Y) and vertical (Vertical Discretization in Z-Direction) sides of the hexahedral region and their nodal coordinates. The relative size of finite elements on the vertical side can be modified using RS1 (relative size at the top) and RS2 (relative size at the bottom) factors (General Vertical Coordinates). The vertical final element sizes are then proportionally distributed. The size of the Simple Hexahedral Domain is specified in the Hexahedral Domain Definition dialog window.

Any possible vertical deviations from the plane parallel with the bottom of the domain can be defined using the dz values (in the Horizontal Discretization in X and Horizontal Discretization in Y parts of the window). This feature still allows relatively general domains to be created.