/home/kapf/tycho_docu/alpha_heat_transfer.c File Reference

#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include "variables_global.h"
#include "prototypes.h"

Go to the source code of this file.

Functions
double	alpha_heat_transfer (int x, int y, int z, int direction)

---

Function Documentation

double alpha_heat_transfer	(	int	x,
		int	y,
		int	z,
		int	direction
	)

Calculates the heat-transfer coefficient for the heat transfer between obstacles and gas. Here you can put your special physics for the heat transfer coefficient in. Example for flat wall.

Definition at line 25 of file alpha_heat_transfer.c.

References vx, vy, and vz.

Referenced by diffusion().

                                                               {

    double heat_transfer_coefficient;
    double velocity_component_at_obstacle;

    //the x-y-z sweeps
    if (direction == 0) velocity_component_at_obstacle = sqrt(pow(vy[x][y][z],2)+pow(vz[x][y][z],2));
    if (direction == 1) velocity_component_at_obstacle = sqrt(pow(vx[x][y][z],2)+pow(vz[x][y][z],2));
    if (direction == 2) velocity_component_at_obstacle = sqrt(pow(vx[x][y][z],2)+pow(vy[x][y][z],2));


    if (velocity_component_at_obstacle <= 5) heat_transfer_coefficient = 5.6 + 4.0 * velocity_component_at_obstacle;
    if (velocity_component_at_obstacle > 5) heat_transfer_coefficient = 7.2 + pow(velocity_component_at_obstacle, 0.78);

    return heat_transfer_coefficient;
}