exam5.c

CSIMPLE2d CFD C源程序

/*
* exam5.c : example 5 for SIMPLE
*/
/*
* 注意C与FORTRAN的差别：
* 1. C中的数组下标是从0开始的,而FORTRAN则是从1开始的
*   因此本程序中的一些量(如L1,L2,L3,M1,M2,M3,NFMAX,nGam,nP,nRho,IPref,JPref)比FORTRAN程序中的小1
*   所有数组的下标从0开始,程序中数组下标中出现的数字比FORTRAN中的小1
* 2. C的数组是按行优先读的,而FORTRAN的则是按列读的
*   因此本程序中的F的定义不同,是F[NFMAX][I][J]
* 3. C用指针来实现FORTRAN的EQUIVALENCE功能。
*   如定义double (*U)[NSIZE],U=F[0],则U[i][j]等同于F[0][i][j];
*/

#include "staincl.h"
#include "extern.h"

#define PI 3.14159
/*global variable for user */
	double (*T)[NSIZE];

/*******************************************************************************
* functon name:	fnGrid
* description:	in this file you should do:
*			--initialize variable you defined
*			--set the filename of the output file, the step can be ignored 
*			--set the title of the variable that will be calculated
*			--set which variable will be calc and print
*			--set axis mode-nMode: 1-cartesian, 2-axisymmetric, 3-polar
*			--set the number of steps
*			--set the number of grids
*			--devide grids
********************************************************************************/
void fnGrid()
{
	T=F[3];
	szTitle[0]="U";
	szTitle[1]="V";
	szTitle[2]="Str Fun";
	szTitle[3]="temprature";
	bSolve[3]=TRUE;
	bPrint[0]=TRUE;
	bPrint[1]=TRUE;
	bPrint[2]=TRUE;
	bPrint[3]=TRUE;
	iLast=5;
	XL=1.0;
	YL=1.0;
	L1=6;//
	M1=6;//

	fnUGrid();
}

/*******************************************************************************
* functon name:	fnStart
* description:	in this file you should do:
*			--initialize the 
********************************************************************************/
void fnStart()
{
	int i,j;
	for( i=0;i<=L1;i++)
	{
		for( j=0;j<=M1;j++)
		{
			U[i][j]=10*(i-1)/(L1-1);
			V[i][j]=-10*(j-1)/(M1-1);
			T[i][j]=50;
			T[0][j]=100;
		}
	}
}

/*******************************************************************************
* functon name:	fnDense
* description:	in this file you should do:
*			--calc the density if needed
********************************************************************************/
void fnDense()
{

}

/*******************************************************************************
* functon name:	fnbound
* description:	in this file you should do:
*			--calc the boundary
********************************************************************************/
void fnBound()
{
	int i,j;
	for( i=1;i<=L2;i++)
		T[i][0]=T[i][1];
	for( j=1;j<=M2;j++)
		T[L1][j]=T[L2][j];
}

/*******************************************************************************
* functon name:	fnOutput
* description:	in this file you should do:
*			--print calc info to terminal or write to file
********************************************************************************/
void fnOutPut()
{
	if(iIter==0)
		fprintf(pFileOut,"\n      Iter        T[3][4]      T[4][2]");
	fprintf(pFileOut,"\n     %4d     %12.8f    %12.8f ",iIter,T[3][4],T[4][2]);

	if(iIter==iLast)
		fnPrint();
}

/*******************************************************************************
* functon name:	fnGamsor
* description:	in this file you should do:
*			--set the gam 
*			--set the sc,sp
********************************************************************************/
void fnGamSor()
{
	int i,j;
	for( i=0;i<=L1;i++)
	{
		for( j=0;j<=M1;j++)
		{
			Gam[i][j]=1;
			Gam[i][0]=0;
			Gam[L1][j]=0;
		}
	}
}