mb_cns.h File Reference

Header file for the synchronous multiblock flow solver mb_cns.c. More...

#include "../../util/source/compiler.h"
#include "../../util/source/useful.h"
#include "../../gas_models/source/gas.h"
#include "../../flux_calc/source/flux_calc.h"
#include "cns_case_id.h"
#include "cns_work_vector.h"
#include "cns_debug_level.h"
#include "cns_cell.h"
#include "cns_block.h"
#include "cns_echo.h"
#include "cns_bc_defs.h"

Go to the source code of this file.

Data Structures
struct	neighbour
	Block-interconnection data structure. More...
struct	global_data
	Global data structure for control of the overall time-stepping. More...
Defines
#define	PRINT_COUNT   20
	Number of steps between writing status message to console.
#define	CFL_COUNT   10
	Number of steps between CFL (time-step checks).
#define	DT_REDUCTION_FACTOR   0.2
#define	ADJUST_INVALID_CELL_DATA   1
	Parameters for cell checking...
#define	PREFER_COPY_FROM_LEFT   0
#define	MAX_INVALID_CELLS   10
#define	MB_CNS_HEADER_ALREADY_INCLUDED

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Detailed Description

Header file for the synchronous multiblock flow solver mb_cns.c.

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Define Documentation

#define ADJUST_INVALID_CELL_DATA   1

Parameters for cell checking... When decoding the array of conserved quantities, the temperature or the density may try to go negative. If it does and ADJUST_INVALID_CELL_DATA == 1, the cell data is adjusted to make it reasonable. If PREFER_COPY_FROM_LEFT == 1 when adjusting data, the new values are obtained from the cell to the left, else the values are obtained by averaging the properties in nearby cells. These parameters affect the behaviour of function count_invalid_cells(). MAX_INVALID_CELLS is the maximum number of cells (per block) for which this event will be tolerated without too much complaint.

#define DT_REDUCTION_FACTOR   0.2

If an attempt at a time step fails because of invalid cells, the time step is re-attempted with a smaller time step. This reduction factor is somewhat arbitrary. A factor of 0.5 would seem to be not enough but a factor of 0.1 would seem too expensive.

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