7.29. Local Coordinate Systems

This section is referenced in the following other sections

Simulation Setup: Local Coordinate System

7.29.1. Local Coordinate System

Scope: Sierra
Summary: Defines the local coordinate system parameters.
Description: This Command Block allows the definition of a coordinate system that can be used to transform values for output or field calculations. For any specific local coordinate system three pieces of information are required for completely defining a coordinate system are the origin, a coordinate axis vector and a point lying on one of the other axes. Using this information a transformation from the local coordinate system to the computational coordinate system can be determined.

begin Local Coordinate System Coordinate_System_Name

   Origin {=} Value...

   Point {=} Value...

   Type {=} {cartesian | conical | cylindrical | spherical}

   Vector {=} Value...

end Local Coordinate System Coordinate_System_Name

7.29.1.1. Line Commands

Origin

Syntax: Origin {=} Value…
Summary: Local coordinate system origin.
Description: Specifies the point as the origin of a local coordinate system. The number of coordinates may be either 2 or 3 depending on the spatial dimension. By default, a value of $z=0.0$ is used for 2D.

Parameter	Value	Default
{=}	{= \| are \| is}	–
Value	real…	–

Point

Syntax: Point {=} Value…
Summary: Local coordinate alternative point.
Description: Declare the point that lies on an alternate axis and is in the plane subtended by the specified VECTOR and the vector defined by the point and the origin.

Parameter	Value	Default
{=}	{= \| are \| is}	–
Value	real…	–

Type

Syntax: Type {=} {cartesian | conical | cylindrical | spherical}
Summary: Local coordinate system type.
Description: This line command selects the coordinate system type.

Parameter	Value	Default
{=}	{= \| are \| is}	–
CoordType	{cartesian \| conical \| cylindrical \| spherical}	–

Vector

Syntax: Vector {=} Value…
Summary: Local coordinate axis vector.
Description: Declare the vector that defines one of the coordinate axes. The specific usage depends on the selected coordinate system type.

Parameter	Value	Default
{=}	{= \| are \| is}	–
Value	real…	–

7.29.2. Local Coordinate System

Syntax: Local Coordinate System {=} Mesh Entities
Summary: Associate coordinate system with mesh entity.
Description: Specify the local coordinate system to be used in conjunction with given element blocks.

Parameter	Value	Default
{=}	{= \| are \| is}	–
Mesh Entities	string	–