Creating Regions and Gridpoints

This section or topic is specific to Console Mode.

Enter a new region by specifying its name and, unless it is the first region, how it should be located with respect to one already existing region. The size of a region is determined when a grid is entered into the region.

About System, Cells and Regions and About Regions and Grids

  1. Complete Defining a System in Console Mode.
  2. Use ENTER_REGION to enter a region into the system.
  3. Enter an arbitrary name for the region at the Region name prompt.
  4. If this is the first region you create in your system, then you are finished. Otherwise, continue to the next step.
  5. Enter the name of an already existing region to which the new region is attached.
  6. Specify whether the new region should be Attached to the right of the existing region. Enter Y to attach to the existing region’s right side or N to attach it to its left side.
  7. If the system has a cylindrical or spherical geometry, then this is a question of whether to put the new region outside the existing region, so that the new region surrounds the existing one, or to put it at the existing region’s centre, so that the existing region surrounds the new region.

This topic describes how you specify the size and grid point distribution to use in a region.

  1. Complete Defining a System in Console Mode and Creating a region.
  2. Use ENTER_GRID_COORDINATES followed by the name of the region.
  3. Specify the width of the region in meters.
  4. At the Number of points prompt enter the number of grid points for the region.
  5. Specify the type of grid point distribution to have in the region.
    • Linear for an equally spaced grid.
    • Read_Point_by_Point to read a number of specific grid points from a data file.
    • Geometric for a grid that yields a varying density of grid points in the region. Enter the Value of R in the geometrical series, which determines the distribution. A geometrical factor larger than one yields a higher density of grid points at the lower end of the region and a factor smaller than one yields a higher density of grid points at the upper end of the region.
    • Double_Geometric to have a high number of grid points in the middle or at both ends of a region. Specify two geometrical factors. Value of R in the geometrical series for lower part of region for the distribution in the lower (left) part of a region, and Value of R in the geometrical series for upper part of subregion for the distribution in the upper (right) part of a region.