udf 编写等离子体物性方面问题 请各路高手帮忙看看问题
我做的是等离子体发生器的数值模拟，用UDF编写ar等离子体物性，通过双线性插值法编写物性，通过1atm，0.1atm，0.01atm，0.001atm压力下，温度范围在300K~30000k，间隔50K，通过插值得到粘性，密度，热导率，声速，但在初始化的时候出现问题。#include "udf.h"
float gasprop(float t,float table);
float rho,vis,ak,ah,cp,sig,speed; //密度粘性系数导热系数比焓定压比热电导率声速
float tbt0,tbrho0,tbvis0,tbak0,tbsig0,tbah0,tbcp0,tbspeed0; //温度密度粘性系数导热系数电导率比焓 定压比热声速
float tbt1,tbrho1,tbvis1,tbak1,tbsig1,tbah1,tbcp1,tbspeed1;
float tbt2,tbrho2,tbvis2,tbak2,tbsig2,tbah2,tbcp2,tbspeed2;
float tbt3,tbrho3,tbvis3,tbak3,tbsig3,tbah3,tbcp3,tbspeed3; //定义用于存储物性的数组；
float temperature; //同fluent联系
float pressure; //同fluent联系
float rhoh,rhol,vh,vl,akh,akl,cph,cpl,sigh,sigl,speedh,speedl;
float p0,p1,p2,p3;
//////////////////////////////////////////读取物性参数////////////////////////////////////////////////////////
DEFINE_ON_DEMAND(Property_data)
{
FILE *fp;
int i;
fp = fopen("1.0atm.DAT", "r");
for(i=0;i<595;i++)
fscanf(fp,"%e %e %e %e %e %e %e %e",&tbt0,&tbrho0,&tbvis0,&tbak0,&tbsig0,&tbah0,&tbcp0,&tbspeed0);//温度密度粘性系数导热系数电导率比焓 定压比热声速
fclose(fp);
fp = fopen("0.1atm.DAT", "r");
for(i=0;i<595;i++)
fscanf(fp,"%e %e %e %e %e %e %e %e",&tbt1,&tbrho1,&tbvis1,&tbak1,&tbsig1,&tbah1,&tbcp1,&tbspeed1);
fclose(fp);
fp = fopen("0.01atm.DAT", "r");
for(i=0;i<595;i++)
fscanf(fp,"%e %e %e %e %e %e %e %e",&tbt2,&tbrho2,&tbvis2,&tbak2,&tbsig2,&tbah2,&tbcp2,&tbspeed2);
fclose(fp);
fp = fopen("0.001atm.DAT", "r");
for(i=0;i<595;i++)
fscanf(fp,"%e %e %e %e %e %e %e %e",&tbt3,&tbrho3,&tbvis3,&tbak3,&tbsig3,&tbah3,&tbcp3,&tbspeed3);
fclose(fp);
}
//////////////////////////////////////////////////定义粘性系数/////////////////////////////////////
DEFINE_PROPERTY(viscosity,c,t)
{
real mu_lam;
p0 = 101325 * 1;
p1 = 101325 * 0.1;
p2 = 101325 * 0.01;
p3 = 101325 * 0.001;
temperature= C_T(c,t);
pressure=C_P(c,t);
if (pressure>=p0)
{
vh= gasprop(temperature,tbvis0);
vis=vh;
}
else if (pressure>=p1&&pressure<p0)
{
vh= gasprop(temperature,tbvis0);
vl=gasprop(temperature,tbvis1);
vis=vh+(vl-vh)/(p1-p0)*(pressure-p0);
}
else if (pressure>=p2&&pressure<p1)
{
vh= gasprop(temperature,tbvis1);
vl=gasprop(temperature,tbvis2);
vis=vh+(vl-vh)/(p2-p1)*(pressure-p1);
}
else if (pressure>=p3&&pressure<p2)
{
vh= gasprop(temperature,tbvis2);
vl=gasprop(temperature,tbvis3);
vis=vh+(vl-vh)/(p3-p2)*(pressure-p2);
}
else
{
vh= gasprop(temperature,tbvis3);
vis=vh;
}
mu_lam=vis;
return mu_lam;
}
//////////////////////////////////////////////////定义热导率/////////////////////////////////////
DEFINE_PROPERTY(thermal_conductivity,c,t)
{
real ther;
p0 = 101325 * 1;
p1 = 101325 * 0.1;
p2 = 101325 * 0.01;
p3 = 101325 * 0.001;
temperature= C_T(c,t);
pressure=C_P(c,t);
if (pressure>=p0)
{
akh=gasprop(temperature,tbak0);
ak=akh;
}
else if (pressure>=p1&&pressure<p0)
{
akh= gasprop(temperature,tbak0);
akl=gasprop(temperature,tbak1);
ak=akh+(akl-akh)/(p1-p0)*(pressure-p0);
}
else if (pressure>=p2&&pressure<p1)
{
akh= gasprop(temperature,tbak1);
akl=gasprop(temperature,tbak2);
ak=akh+(akl-akh)/(p2-p1)*(pressure-p1);
}
else if (pressure>=p3&&pressure<p2)
{
akh= gasprop(temperature,tbak2);
akl=gasprop(temperature,tbak3);
ak=akh+(akl-akh)/(p3-p2)*(pressure-p2);
}
else
{
akh=gasprop(temperature,tbak3);
ak=akh;
}
ther=ak;
return ther;
}
//////////////////////////////////////////////////定义密度/////////////////////////////////////
DEFINE_PROPERTY(density,c,t)
{
real dens;
p0 = 101325 * 1;
p1 = 101325 * 0.1;
p2 = 101325 * 0.01;
p3 = 101325 * 0.001;
temperature=C_T(c,t);
pressure=C_P(c,t);
if (pressure>=p0)
{
rhoh=gasprop(temperature,tbrho0);
rho=rhoh;
}
else if (pressure>=p1&&pressure<p0)
{
rhoh=gasprop(temperature,tbrho0);
rhol=gasprop(temperature,tbrho1);
rho=rhoh+(rhol-rhoh)/(p1-p0)*(pressure-p0);
}
else if (pressure>=p2&&pressure<p1)
{
rhoh= gasprop(temperature,tbrho1);
rhol=gasprop(temperature,tbrho2);
rho=rhoh+(rhol-rhoh)/(p2-p1)*(pressure-p1);
}
else if (pressure>=p3&&pressure<p2)
{
rhoh=gasprop(temperature,tbrho2);
rhol=gasprop(temperature,tbrho3);
rho=rhoh+(rhol-rhoh)/(p3-p2)*(pressure-p2);
}
else
{
rhoh=gasprop(temperature,tbrho3);
rho=rhoh;
}
dens=rho;
return dens;
}
//////////////////////////////////////////////////定义声速/////////////////////////////////////
DEFINE_PROPERTY(sonic_speed,c,t)
{
real sonic;
p0 = 101325 * 1;
p1 = 101325 * 0.1;
p2 = 101325 * 0.01;
p3 = 101325 * 0.001;
temperature= C_T(c,t);
pressure=C_P(c,t);
if (pressure>=p0)
{
speedh=gasprop(temperature,tbspeed0);
speed=speedh;
}
else if (pressure>=p1&&pressure<p0)
{
speedh=gasprop(temperature,tbspeed0);
speedl=gasprop(temperature,tbspeed1);
speed=speedh+(speedl-speedh)/(p1-p0)*(pressure-p0);
}
else if (pressure>=p2&&pressure<p1)
{
speedh=gasprop(temperature,tbspeed1);
speedl=gasprop(temperature,tbspeed2);
speed=speedh+(speedl-speedh)/(p2-p1)*(pressure-p1);
}
else if (pressure>=p3&&pressure<p2)
{
speedh=gasprop(temperature,tbspeed2);
speedl=gasprop(temperature,tbspeed3);
speed=speedh+(speedl-speedh)/(p3-p2)*(pressure-p2);
}
else
{
speedh=gasprop(temperature,tbspeed3);
speed=speedh;
}
sonic=speed;
return sonic;
}
float gasprop(float t,float table)
{
int k;
float delt,gasp;
if(t<300) t=300;
if(t>30000) t=30000;
k=(int)((t-300)/50);
delt=(t-k*50-300);
gasp=table+delt/50*(table-table);
return (gasp);
}
初始化时，出现这个问题
Error:
FLUENT received fatal signal (ACCESS_VIOLATION)
1. Note exact events leading to error.
2. Save case/data under new name.
3. Exit program and restart to continue.
4. Report error to your distributor.
Error Object: ()
我曾尝试之导入粘性和热导率的UDF都没有问题，但是只要密度的UDF一加入就会出这个错误，但是我找不出原因！！
[ 本帖最后由 jony322 于 2013-5-18 13:02 编辑 ] 楼主，不知道您用这种方法模拟出来了吗？我现在才刚刚入门，想做点射频等离子体的模拟，能交流下吗
QQ997492059
您好，请问你从哪里找到的氩等离子体的物性参数的？能分享一下吗？ 你好，想请教你如何将数据组写入udf进行插值计算呢？本人做超临界CO2方面的模拟，用matlab做出了P-T-密度（声速、熵等）三维图，不知如何将数据组导入fluent中插值计算。还请赐教 看起来好难 看起来好难
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