mkgeo_grid(1rheolef)						    rheolef-6.1 					      mkgeo_grid(1rheolef)

NAME

       mkgeo_grid -- build a strutured mesh of a parallelotope, in 1d, 2d or 3d

SYNOPSIS

	       mkgeo_grid options [nx [ny [nz]]]

EXAMPLE

       The following command build a triangular based 2d 10x10 grid of the unit square:

	       mkgeo_grid -t 10 > square-10.geo
	       geo square-10.geo

       or in one comand line:

	       mkgeo_grid -t 10 | geo -

DESCRIPTION

       This  command  is usefull when testing programs on simple geometries.  It avoid the preparation of an input file for a mesh generator.  The
       optional nx, ny and nz arguments are integer that specifies the subdivision in each direction. By default nx=10, ny=nx and nz=ny.  The mesh
       files goes on standard output.

       The command supports all the possible element types: edges, triangles, rectangles, tetraedra, prisms and hexahedra.

ELEMENT TYPE OPTIONS

       -e     1d mesh using edges.

       -t     2d mesh using triangles.

       -q     2d mesh using quadrangles (rectangles).

       -T     3d mesh using tetraedra.

       -P     3d mesh using prisms.

       -H     3d mesh using hexahedra.

THE GEOMETRY

       The  geometry can be any [a,b] segment, [a,b]x[c,d] rectangle or [a,b]x[c,d]x[f,g] parallelotope. By default a=c=f=0 and b=d=g=1, thus, the
       unit boxes are considered. For instance, the following command meshes the [-2,2]x[-1.5, 1.5] rectangle:

	       mkgeo_grid -t 10 -a -2 -b 2 -c -1.5 -d 1.5 | geo -

       -a float

       -b float

       -c float

       -d float

       -f float

       -g float

BOUNDARY DOMAINS

       -sides

       -nosides
	      The boundary sides are representd by domains: left, right, top, bottom,front and back.

       -boundary

       -noboundary
	      This option defines a domain named boundary that groups all sides.  By default, both sides and the whole	boundary  are  defined	as
	      domains:

		      mkgeo_grid -t 10 > square.geo
		     geo square.geo
		      mkgeo_grid -t 10 -nosides > square.geo
		     geo square.geo
		      mkgeo_grid -t 10 -noboundary > square.geo
		     geo square.geo
		      mkgeo_grid -t 10 -noboundary -nosides > square.geo
		     geo square.geo

REGIONS

       -region

       -noregion
	      The  whole domain is splitted into two subdomains: east and west, This option is used for testing computations with subdomains (e.g.
	      transmission problem; see the user manual).

		      mkgeo_grid -t 10 -region | geo -

CORNERS

       -corner

       -nocorner
	      The corners (four in 2D and eight in 3D) are defined as OD-domains.  This could be usefull for some special boundary conditions.

		      mkgeo_grid -t 10 -corner | geo -
		      mkgeo_grid -T  5 -corner | geo -

COORDINATE SYSTEM OPTION

       Most of rheolef codes are coordinate-system independant.  The coordinate system is specified in the geometry file `.geo'.

       -zr

       -rz    the 2d mesh is axisymmetric: zr (resp. rz) stands when the symmetry is related to the first (resp. second) coordinate.

FILE FORMAT OPTION

rheolef-6.1							    rheolef-6.1 					      mkgeo_grid(1rheolef)