Streamer fluid modeling - An overview of ARCoS: sprites.c File Reference

Streamer fluid modeling - An overview of ARCoS 1.0

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src

Routines for the "sprites module.". More...

#include <stdlib.h>
#include <stdio.h>
#include <math.h>
#include <string.h>
#include "cdr.h"
#include "parameters.h"
#include "photo.h"
#include "proto.h"
#include "rz_array.h"
#include "species.h"

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Functions
static int	var_max_axis (cdr_grid_t grid, rz_array_t var, int sign)
	var_max_axis QQQQ

double	spr_density_at (double altitude)
	The density at a given height, assuming dens = 1.0 at height = 0.0.

void	spr_init ()
	Initialize the sprite module.

void	spr_hook (cdr_grid_t *grid)
	Hook to update the variables that depend on the head altitude.

void	spr_update (double altitude)
	Updates the magnitudes that we are tracking according to a given altitude.

double	spr_head_altitude (cdr_grid_t *grid, int sign)
	Finds the position of the streamer head by locating the maximum (or -maximum) of the charge along the streamer axis.

Variables
double	spr_nu_a

double	spr_nu_d

double	spr_nu_rt

photo_term_t *	spr_photo_terms

photo_term_t *	photo_terms

Detailed Description

Routines for the "sprites module.".

The idea here is to cope with strongly varying densities along the streamer propagation.

For photoionization we use a "local maximum approximation", i.e. the quenching and absorption lengths for all the volume are taken as those corresponding to the streamer head.

Definition in file sprites.c.

Function Documentation

static int var_max_axis	(	cdr_grid_t *	grid,
		rz_array_t *	var,
		int	sign
	)

static

var_max_axis QQQQ

Definition at line 111 of file sprites.c.

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double spr_density_at ( double altitude )

The density at a given height, assuming dens = 1.0 at height = 0.0.

We are assuming an exponential profile here but in principle any other profile would also do.

Definition at line 36 of file sprites.c.

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void spr_init ( )

Initialize the sprite module.

We have to remember the values of the global variables that we will adapt to altitude.

Definition at line 48 of file sprites.c.

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void spr_hook ( cdr_grid_t * grid )

Hook to update the variables that depend on the head altitude.

Has to be called AFTER the charge is calculated.

Definition at line 65 of file sprites.c.

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void spr_update ( double altitude )

Updates the magnitudes that we are tracking according to a given altitude.

Definition at line 78 of file sprites.c.

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double spr_head_altitude	(	cdr_grid_t *	grid,
		int	sign
	)

Finds the position of the streamer head by locating the maximum (or -maximum) of the charge along the streamer axis.

sign has to be +1 for positive streamers and -1 for negative streamers.

Definition at line 101 of file sprites.c.

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Variable Documentation

double spr_nu_a

Definition at line 26 of file sprites.c.

double spr_nu_d

Definition at line 26 of file sprites.c.

double spr_nu_rt

Definition at line 26 of file sprites.c.

photo_term_t* spr_photo_terms

Definition at line 27 of file sprites.c.

photo_term_t* photo_terms

Definition at line 35 of file photo.c.