init_g Module

Does the related namelist exist in the target input file?

Used to hold the specific index of numbered namelists

Do we want to skip the read step in init?

Do we want to skip the broadcast step in init?

Amplitude of equilibrium Apara: if a0 is non-zero, $u_0$ is rescaled to give this Apara amplitude

Used by ginit_option "recon3": adjust input parameter of this species; if = 0, just warn if given conditions are not satisfied

Used by ginit_option "nl3r": set amplitude of apar if width0 is negative

Used in initialization for the Orszag-Tang 2D vortex problem (ginit_option "ot"). Controls size of jpar term. FIXME: Reference equations?

Amplitude of equilibrium By: if b0 is non-zero, $u_0$ is rescaled to give this By amplitude by overriding a0

Rarely needed. Forces asymmetry into initial condition. Warning: This does not behave as one may expect in flux tube simulations (see clean_init), this can be important as the default is to use chop_side

Used with ginit_option "noise". Ensures that in flux tube simulations the connected boundary points are initialised to the same value. Also allows for chop_side to behave correctly in flux tube simulations.

Use the constant_random number generator, which always gives the same random numbers. Useful for testing.

Amplitude of zeroth density perturbation for ginit_option options:

Amplitude of first density perturbation for ginit_option options:

Amplitude of second density perturbation for ginit_option options:

Amplitude of $\phi$ for "nl7" (see ginit_nl7)

Mode number in $x$ for the sinusoidal equilbrium option of ginit_option "recon3" (see ginit_recon3), applies to density and temperatures

Mode number in $x$ for the sinusoidal equilbrium option of ginit_option "recon3" (see ginit_recon3), applies to parallel velocity

Equilbrium choice for ginit_option "recon3" (see ginit_recon3). Choices are:

Sometimes initial conditions have definite parity; this picks the parity in those cases. Affects the following choices of ginit_option:

Method for initialising g. There are many possible options, but the typical ones are:

$k_y$ indices of two modes to initialise for certain options

$k_y$ indices of three modes to initialise for certain options

Parallel mode number to initialise for ginit_option "single_parallel_mode" with periodic boundary conditions

If greater than zero, initialise only the given $k_x$ with ginit_option "noise". This is useful for linear runs with flow shear, to track the evolution of a single Lagrangian mode.

Amplitude of imaginary part of $\phi$ for various ginit_option options

Initial spectrum power index. with ginit_option "noise".

Do we want to include the explicit source terms and related timesteps when saving/restoring from the restart file.

If true then the initial condition is used to set the non-adiabatic distribution function rather than the g evolved by GS2.

Print some debug information for ginit_option "recon3"

$k_x$ indices of two modes to initialise for certain options

$k_x$ indices of three modes to initialise for certain options

Parallel mode number to initialise for ginit_option "single_parallel_mode" with linked boundary conditions

If chop_side is true, chop out left side in theta if true, right side if false. Applies to: FIXME: list of initial conditions

The maximum mode number to initialise for ginit_option "random_sine". Actual maximum used will be lower of max_mode and ntheta/8

Change fields implicit initialisation somehow

"Nullify fields". Used by ginit_option "recon3"

"Nullify fields". Used by ginit_option "recon3"

"Nullify fields". Used by ginit_option "recon3"

Used in initialization for the Orszag-Tang 2D vortex problem.

If doing multiple flux tube calculations, multiply phiinit by (job * phifrac + 1). Allows for ensemble averaging of multiple flux tube calculations

Average amplitude of initial perturbation of each Fourier mode. Used by most ginit_option options

Amplitude of equilibrium. Used by ginit_option "recon3"

Amplitude of random perturbation. Used by ginit_option "recon3"

Which processor is responsible for saving/reading potentials to/from restart files. If <0 then all procs write to restart files. If >= nproc then set to proc_to_save_fields = mod(proc_to_save_fields, nproc)

Width of "porcelli", "doubleharris" profiles in ginit_option "recon3". If negative, this gives the ratio to the box size

Restart from many restart files. If false, use a single restart file: this requires GS2 to have been built with parallel netCDF.

Amplitude of real part of $\phi$ for various ginit_option options

Directory to read/write restart files to/from. Make sure this exists before running (see file_safety_check)

Used to select with eigensolver generated restart file to load. Sets <id> in restart_file//eig_<id>//.<proc> string used to set filename. Note that this is zero indexed.

Basename of restart files

Rescale amplitudes of fields for restart ginit_option options such as "restart". Note that if scale is negative, the fields are scaled by -scale / max(abs(phi))!

Amplitude of zeroth parallel temperature perturbation for ginit_option options:

Amplitude of first parallel temperature perturbation for ginit_option options:

Amplitude of second parallel temperature perturbation for ginit_option options:

Amplitude of zeroth perpendicular temperature perturbation for ginit_option options:

Amplitude of first perpendicular temperature perturbation for ginit_option options:

Amplitude of second perpendicular temperature perturbation for ginit_option options:

Force t = tstart at beginning of run

Perturbation amplitude of parallel velocity? Used by ginit_option "recon3"

Amplitude of zeroth parallel velocity perturbation for ginit_option options:

Amplitude of first parallel velocity perturbation for ginit_option options:

Amplitude of second parallel velocity perturbation for ginit_option options:

Width of initial perturbation Gaussian envelope in $\theta$

Amplitude of initial zonal flow perturbations relative to other modes