# AA_CYLINDRICAL

Section can be repeated.

Parameters for creating axis-aligned cylindrical Dirichlet boundary regions. [Edit on GitHub]

## Keywords

- APX_TYPE

- BASE_CENTER

- BASE_RADIUS

- DELTA_ALPHA

- FREQUENCY

- N_PRTN

- N_SIDES

- OSCILLATING_FRACTION

- PARALLEL_AXIS

- PHASE

- SMOOTHING_WIDTH

- THICKNESS

- V_D

- XTNT

## Keyword descriptions

APX_TYPE: enum = CIRCUMSCRIBED

  Usage: APX_TYPE <apx_type>

  Valid values:

  - `CIRCUMSCRIBED`

  - `INSCRIBED`

  Specifies the type of the n-gonal prism approximating the cylinder. [Edit on GitHub]

BASE_CENTER: real[2] = [angstrom]

  Usage: BASE_CENTER <y(real)> <z(real)>

  The y and z coordinates (x and z or x and y coordinates, depending on the choice of the parallel axis) of the cylinder’s base center. [Edit on GitHub]

BASE_RADIUS: real = 1.00000000E+000 [angstrom]

  Usage: BASE_RADIUS <real>

  The base radius of the cylinder. [Edit on GitHub]

DELTA_ALPHA: real = 5.00000000E-002 [rad]

  Usage: delta_alpha <real>

  A central angle specifying the gap between the faces of the n-gonal prism. To avoide overlap between the cuboids (of the given thickness) built on top of the faces, a larger value is required if the number of faces (N_SIDES) is quite few and/or the base radius is fairly small. [Edit on GitHub]

FREQUENCY: real = 0.00000000E+000 [s^-1]

  Usage: FREQUENCY <real>

  The frequency with which the oscillating fraction oscillates. [Edit on GitHub]

N_PRTN: integer[2] = 1 1

  Usage: N_PRTN <integer> <integer>

  The number of partitions along the face edges of the prism for tiling. If the edges have different lengths, from the two given values, the larger one will be assigned to the longer edge. [Edit on GitHub]

N_SIDES: integer = 5

  Usage: N_SIDES <integer>

  The number of sides (faces) of the n-gonal prism approximating the cylinder. [Edit on GitHub]

OSCILLATING_FRACTION: real = 0.00000000E+000

  Usage: OSCILLATING_FRACTION <real>

  A fraction of the field can be set to oscilate over time. [Edit on GitHub]

PARALLEL_AXIS: enum

  Usage: PARALLEL_AXIS <axis>

  Valid values:

  - `X`

  - `Y`

  - `Z`

  The coordinate axis that the cylindrical region extends along. [Edit on GitHub]

PHASE: real = 0.00000000E+000

  Usage: PHASE <real>

  The phase of the oscillattion. A phase of zero corresponds to a cosine function. [Edit on GitHub]

SMOOTHING_WIDTH: real = 2.00000000E-001 [angstrom]

  Aliases: SIGMA

  Usage: SMOOTHING_WIDTH <real>

  The width of the transition region between the Dirichlet subdomain and its surrounding. [Edit on GitHub]

THICKNESS: real = 7.50000000E-001 [angstrom]

  Usage: THICKNESS <real>

  The thickness of the cylinder. [Edit on GitHub]

V_D: real = [volt]

  Usage: v_D <real>

  The value of the fixed potential to be imposed at the cylindrical Dirichlet boundary. [Edit on GitHub]

XTNT: real[2] = [angstrom]

  Usage: xtnt <xmin(real)> <xmax(real)>

  The extents of the cylinder along its central axis. [Edit on GitHub]