Struphy perturbation

ModesSin

Coordinate slices

The sampled perturbation value across the three logical coordinate planes.

Perturbation value ueta1–eta2 · -1.00e-4 to 1.00e-4

Perturbation value ueta1–eta3 · -9.98e-5 to 9.98e-5

Perturbation value ueta2–eta3 · -9.87e-5 to 9.87e-5

eta1 · other coordinates fixed at 0.5

eta2 · other coordinates fixed at 0.5

eta3 · other coordinates fixed at 0.5

Parameter	Value	Description
`ls`	`[2]`	Mode numbers in x-direction (kx = l2pi/Lx).
`ms`	`[3]`	Mode numbers in y-direction (ky = m2pi/Ly).
`ns`	`null`	Mode numbers in z-direction (kz = n2pi/Lz).
`amps`	`[0.0001]`	Amplitude of each mode.
`theta`	`null`	Phase of each mode.
`pfuns`	`["Id"]`	"Id" or "localize" define the profile functions. localize multiply the sinus by :math: `tanh((\eta_3 - 0.5)/\delta)/cosh((\eta_3 - 0.5)/\delta)` to localize it around 0.5. :math: `\delta` is given by the input parameter pfuns_params
`pfuns_params`	`[0]`	The parameter needed by the profile function Lx, Ly, Lz : float Domain lengths.
`Lx`	`1`	—
`Ly`	`1`	—
`Lz`	`1`	—
`given_in_basis`	`null`	In which basis the perturbation is represented (see base class).
`comp`	`0`	Which component (0, 1 or 2) of vector is perturbed (=0 for scalar-valued functions)