CurvCoords

class cherab.lhd.emc3.curvilinear.CurvCoords(grid: CenterGrid)Source

Bases: object

Class for curvilinear coordinates.

This class is used to represent curvilinear coordinates of EMC3-EIRENE-defined center grids, and calculate co/contra-variant bases, metric tensors, etc.

This curvilinear coordinates follows the radial, poloidal and toroidal directions of the magnetic field lines, which are based on the EMC3-EIRENE-defined center grids.

Parameters:

gridCenterGrid

Instance of CenterGrid class.

Methods

compute_metric(v1, v2)

Compute metric tensor.

Attributes

b_rho	Radial covariant basis \(\mathbf{b}_\rho\).
b_sup_rho	Radial contravariant basis \(\mathbf{b}^\rho\).
b_sup_theta	Poloidal contravariant basis \(\mathbf{b}^\theta\).
b_sup_zeta	Toroidal contravariant basis \(\mathbf{b}^\zeta\).
b_theta	Poloidal covariant basis \(\mathbf{b}_\theta\).
b_zeta	Toroidal covariant basis \(\mathbf{b}_\zeta\).
grid	CenterGrid instance.
jacobian	Jacobian determinant of EMC3-EIRENE-defined center grids.