mkgeo_ball(1rheolef) [debian man page]
mkgeo_ball(1rheolef) rheolef-6.1 mkgeo_ball(1rheolef) NAME
mkgeo_ball -- build an unstructured mesh of an ellipsoid, in 2d or 3d SYNOPSIS
mkgeo_ball options [n] EXAMPLE
The following command build a triangle based 2d unstructured mesh of the unit ball mkgeo_ball -t 10 > ball-10.geo geo -mayavi ball-10.geo or in one comand line: mkgeo_ball -t 10 | geo -mayavi - DESCRIPTION
This command is usefull when testing programs on simple geometries. Invocation is similar to mkgeo_grid (see mkgeo_grid(1), mkgeo_ugrid(1)). It calls gmsh as unstructured mesh generator. It avoid the preparation of an input file for a mesh generator. The optional n argument is an integer that specifies the subdivision in each direction. By default n=10. The mesh files goes on standard out- put. ELEMENT TYPE OPTIONS
-t 2d mesh using triangles. -q 2d mesh using quadrangles. -tq 2d mesh using both triangles and quadrangles. THE MESH ORDER
-order int The polynomial pproximation mesh order, for the curved boundary, as defined by gmsh. Defualt is order=1. THE GEOMETRY
The geometry can be ellipse/ellipsoid inscribted in the [a,b]x[c,d] rectangle or the [a,b]x[c,d]x[f,g] parallelotope. By default a=c=f=-1 and b=d=g=1, thus, the unit balls are considered. -s Only a surface mesh is generated: a curved line in 2d or a curved surface mesh in 3d. In 3d, supports both '-t' and '-q' options. -a float -b float -c float -d float -f float -g float BOUNDARY DOMAINS
The meshes defines a domain named boundary that groups all boundary sides. OTHERS OPTIONS
-fix -nofix By default, internal face and volume node from gmsh are recomputed, since they have incorrect coordinate that destroy the conver- gence properties of isoparametric high order elements (order >= 3). The -nofix option skip this correction: this option is avail- able for test purpose. -clean clear temporary files (this is the default). -noclean does not clear temporary files. -verbose -noverbose print intermediate commands and information messages. SEE ALSO
mkgeo_grid(1), mkgeo_ugrid(1) rheolef-6.1 rheolef-6.1 mkgeo_ball(1rheolef)
Check Out this Related Man Page
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)