water.cuh File Reference

#include "define.h"
#include "structs.h"
#include "cuTilities.cuh"

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Functions
__global__ void	g_compute_cell_mass (int nTasks, t_arrays *arrays, double *mass)
	This function recounts and stores the total mass of all active cells. More...
__global__ void	g_initialize_delta (int nTasks, t_arrays *arrays)
	This function initializes the variation of conserved variables in the arrays structure to 0.0 and the array solidWallByCell to 0. More...
__global__ void	g_wall_rotated_calculus (int nTasks, t_arrays *arrays, double *localDt)
	This function initializes the variation of conserved variables in the arrays structure to 0.0 and the array solidWallByCell to 0. More...
__global__ void	g_get_dtmin (t_arrays *arrays, double *localDt, int *idmin)
	This function finds the minimum time step out of the vector localDt. If the whole domain is dry, it is set to 1.0 seconds. More...
__global__ void	g_update_contributions (int nTasks, t_arrays *arrays)
	This function computes the right-hand side of the equations to update each physical variable. More...
__global__ void	g_checkpos_h (int nTasks, t_arrays *arrays, int *check)
	This function checks the positivity of the water depth. If there is a cell where the depth is negative (-tol), it write a notification flag in variable check. More...
__global__ void	g_reduce_dt (t_arrays *arrays)
	This function multiplies the time step by a factor of 0.8 if the there is a change to get negative water depths (as checked in function c_checkpos_h). More...
__global__ void	g_set_new_dt (t_arrays *arrays)
	This function sets the new time step according to the dumping and final times. If the precomputed time step is too big, it is reduced to match the desired time. More...
__global__ void	g_update_cells (int nTasks, t_arrays *arrays)
	This function updates the water depth and water discharges (in wet cells). More...
__global__ void	g_check_wetdry (int nTasks, t_arrays *arrays)
	This function checks the presence of wet/dry fronts and writes flags to correct them later. More...
__global__ void	g_update_wetdry_cells (int nTasks, t_arrays *arrays)
	This function corrects the wet/dry fronts found in function c_check_wetdry. More...
__global__ void	g_compute_mass_error (t_arrays *arrays)
	This function computes the mass error of the current state with respect to the previous one (in %). More...
__global__ void	g_reconstruct_active_elements (int nTasks, t_arrays *arrays)
	This function computes the mass error of the current state with respect to the previous one (in %). More...
__device__ void	g_add_active_cells (t_arrays *arrays, int id)
	This function adds the newly wetted cells to the active cells set. More...
__device__ void	g_add_active_walls (t_arrays *arrays, int id)
	This function adds wall identified by index id to the active walls set. More...

Function Documentation

g_add_active_cells()

__device__ void g_add_active_cells	(	t_arrays *	arrays,
		int	id
	)

This function adds the newly wetted cells to the active cells set.

Parameters

arrays	This pointer variable passes the arrays structure.
id	This integer variable passes the index of the wetted cell.

g_add_active_walls()

__device__ void g_add_active_walls	(	t_arrays *	arrays,
		int	id
	)

This function adds wall identified by index id to the active walls set.

Parameters

arrays	This pointer variable passes the arrays structure.
id	This integer variable passes the index of the wetted cell.

g_check_wetdry()

__global__ void g_check_wetdry	(	int	nTasks,
		t_arrays *	arrays
	)

This function checks the presence of wet/dry fronts and writes flags to correct them later.

Parameters

nTasks	This integer variable passes the number of times the computation needs to be done.
arrays	This pointer variable passes the arrays structure.

g_checkpos_h()

__global__ void g_checkpos_h	(	int	nTasks,
		t_arrays *	arrays,
		int *	check
	)

This function checks the positivity of the water depth. If there is a cell where the depth is negative (-tol), it write a notification flag in variable check.

Parameters

nTasks	This integer variable passes the number of times the computation needs to be done.
arrays	This pointer variable passes the arrays structure.
check	This integer acts as a flag to check the positivity of the water depth and is used in calculate.cpp to reduced the time step.

g_compute_cell_mass()

__global__ void g_compute_cell_mass	(	int	nTasks,
		t_arrays *	arrays,
		double *	mass
	)

This function recounts and stores the total mass of all active cells.

Parameters

nTasks	This integer variable passes the number of times the computation needs to be done.
arrays	This pointer variable passes the arrays structure.
mass	This pointer variable passes the mass variable to store it.

g_compute_mass_error()

__global__ void g_compute_mass_error

(

t_arrays *

arrays

)

This function computes the mass error of the current state with respect to the previous one (in %).

Parameters

arrays

This pointer variable passes the arrays structure.

g_get_dtmin()

__global__ void g_get_dtmin	(	t_arrays *	arrays,
		double *	localDt,
		int *	idmin
	)

This function finds the minimum time step out of the vector localDt. If the whole domain is dry, it is set to 1.0 seconds.

Parameters

arrays	This pointer variable passes the arrays structure. arrays->dt is modifed.
localDt	This pointer variable contains the local time steps.
idmin	This pointer variable indicates the component of the minimum time step.

g_initialize_delta()

__global__ void g_initialize_delta	(	int	nTasks,
		t_arrays *	arrays
	)

This function initializes the variation of conserved variables in the arrays structure to 0.0 and the array solidWallByCell to 0.

Parameters

nTasks	This integer variable passes the number of times the computation needs to be done.
arrays	This pointer variable passes the arrays structure.

g_reconstruct_active_elements()

__global__ void g_reconstruct_active_elements	(	int	nTasks,
		t_arrays *	arrays
	)

This function computes the mass error of the current state with respect to the previous one (in %).

Parameters

arrays

This pointer variable passes the arrays structure.

g_reduce_dt()

__global__ void g_reduce_dt

(

t_arrays *

arrays

)

This function multiplies the time step by a factor of 0.8 if the there is a change to get negative water depths (as checked in function c_checkpos_h).

Parameters

arrays

This pointer variable passes the arrays structure.

g_set_new_dt()

__global__ void g_set_new_dt

(

t_arrays *

arrays

)

This function sets the new time step according to the dumping and final times. If the precomputed time step is too big, it is reduced to match the desired time.

Parameters

arrays

This pointer variable passes the arrays structure.

g_update_cells()

__global__ void g_update_cells	(	int	nTasks,
		t_arrays *	arrays
	)

This function updates the water depth and water discharges (in wet cells).

Parameters

nTasks	This integer variable passes the number of times the computation needs to be done.
arrays	This pointer variable passes the arrays structure.

g_update_contributions()

__global__ void g_update_contributions	(	int	nTasks,
		t_arrays *	arrays
	)

This function computes the right-hand side of the equations to update each physical variable.

Parameters

nTasks	This integer variable passes the number of times the computation needs to be done.
arrays	This pointer variable passes the arrays structure. arrays->dt is modifed.

g_update_wetdry_cells()

__global__ void g_update_wetdry_cells	(	int	nTasks,
		t_arrays *	arrays
	)

This function corrects the wet/dry fronts found in function c_check_wetdry.

Parameters

nTasks	This integer variable passes the number of times the computation needs to be done.
arrays	This pointer variable passes the arrays structure.

g_wall_rotated_calculus()

__global__ void g_wall_rotated_calculus	(	int	nTasks,
		t_arrays *	arrays,
		double *	localDt
	)

This function initializes the variation of conserved variables in the arrays structure to 0.0 and the array solidWallByCell to 0.

Parameters

nTasks	This integer variable passes the number of times the computation needs to be done.
localDt	This pointer variable gets the values of the local time steps.