Contains basic functions for problem initialization. More...
#include "pluto.h"
Functions | |
void | Init (double *v, double x1, double x2, double x3) |
void | Analysis (const Data *d, Grid *grid) |
void | BackgroundField (double x1, double x2, double x3, double *B0) |
void | UserDefBoundary (const Data *d, RBox *box, int side, Grid *grid) |
The init.c file collects most of the user-supplied functions useful for problem configuration. It is automatically searched for by the makefile.
void BackgroundField | ( | double | x1, |
double | x2, | ||
double | x3, | ||
double * | B0 | ||
) |
Define the component of a static, curl-free background magnetic field.
[in] | x1 | position in the 1st coordinate direction |
[in] | x2 | position in the 2nd coordinate direction |
[in] | x3 | position in the 3rd coordinate direction |
[out] | B0 | array containing the vector componens of the background magnetic field |
void Init | ( | double * | v, |
double | x1, | ||
double | x2, | ||
double | x3 | ||
) |
The Init() function can be used to assign initial conditions as as a function of spatial position.
[out] | v | a pointer to a vector of primitive variables |
[in] | x1 | coordinate point in the 1st dimension |
[in] | x2 | coordinate point in the 2nd dimension |
[in] | x3 | coordinate point in the 3rdt dimension |
The meaning of x1, x2 and x3 depends on the geometry:
Variable names are accessed by means of an index v[nv], where nv = RHO is density, nv = PRS is pressure, nv = (VX1, VX2, VX3) are the three components of velocity, and so forth.
Assign user-defined boundary conditions.
[in,out] | d | pointer to the PLUTO data structure containing cell-centered primitive quantities (d->Vc) and staggered magnetic fields (d->Vs, when used) to be filled. |
[in] | box | pointer to a RBox structure containing the lower and upper indices of the ghost zone-centers/nodes or edges at which data values should be assigned. |
[in] | side | specifies the boundary side where ghost zones need to be filled. It can assume the following pre-definite values: X1_BEG, X1_END, X2_BEG, X2_END, X3_BEG, X3_END. The special value side == 0 is used to control a region inside the computational domain. |
[in] | grid | pointer to an array of Grid structures. |