貍貓瑩光

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[求助] 兩相流脫氣問題

氣液兩相流，脫氣UDF初始化報錯……
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.
不加氣相UDF源項可以計算……但那樣的話氣體沒有出口……

[ Last edited by 貍貓瑩光 on 2013-1-31 at 15:31 ]

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1樓 2013-01-31 15:18:56

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The following UDFs are used to define the bottom surface as a standard velocity inlet for the gas (primary)phase.The inlet VOF of the droplet phase is 0 and a negative source term for secondary phase mass conservation is set for the layer of cells next to the outlet.The source removes all secondary phase mass in the cell during one time step.The recoil force due to the mass source is also calculated.
#include "udf.h"
#include "sg.h"
#include "sg_mphase.h"
#include "flow.h"
#include "mem.h"
#include "metric.h"

DEFINE_SOURCE(degassing_source, cell, thread, dS, eqn)
{
real source;
Thread *tm = THREAD_SUPER_THREAD(thread);
source = -C_R(cell,thread)*C_VOF(cell,thread)/CURRENT_TIMESTEP ;
C_UDMI(cell,tm,0) = source;
dS[eqn] = -C_R(cell,thread)/CURRENT_TIMESTEP;
return source;
}

DEFINE_SOURCE(x_prim_recoil, cell, tp, dS, eqn)
{
real source;
Thread *tm = THREAD_SUPER_THREAD(tp);
Thread *ts;
ts = THREAD_SUB_THREAD(tm,1);
source = -C_R(cell,ts)*C_VOF(cell,ts)/CURRENT_TIMESTEP*C_U(cell,tp) ;
dS[eqn] = -C_R(cell,ts)*C_VOF(cell,ts)/CURRENT_TIMESTEP ;
return source;
}

DEFINE_SOURCE(x_sec_recoil, cell, ts, dS, eqn)
{
real source;
Thread *tm = THREAD_SUPER_THREAD(ts);
source = -C_R(cell,ts)*C_VOF(cell,ts)/CURRENT_TIMESTEP*C_U(cell,ts) ;
dS[eqn] = -C_R(cell,ts)*C_VOF(cell,ts)/CURRENT_TIMESTEP ;
return source;
}

DEFINE_SOURCE(y_prim_recoil, cell, tp, dS, eqn)
{
real source;
Thread *tm = THREAD_SUPER_THREAD(tp);
Thread *ts;
ts = THREAD_SUB_THREAD(tm,1);
source = -C_R(cell,ts)*C_VOF(cell,ts)/CURRENT_TIMESTEP*C_V(cell,tp) ;
dS[eqn] = -C_R(cell,ts)*C_VOF(cell,ts)/CURRENT_TIMESTEP ;
return source;
}

DEFINE_SOURCE(y_sec_recoil, cell, ts, dS, eqn)
{
real source;
Thread *tm = THREAD_SUPER_THREAD(ts);
source = -C_R(cell,ts)*C_VOF(cell,ts)/CURRENT_TIMESTEP*C_V(cell,ts) ;
dS[eqn] = -C_R(cell,ts)*C_VOF(cell,ts)/CURRENT_TIMESTEP ;
return source;
}

DEFINE_SOURCE(z_prim_recoil, cell, tp, dS, eqn)
{
real source;
Thread *tm = THREAD_SUPER_THREAD(tp);
Thread *ts;
ts = THREAD_SUB_THREAD(tm,1);
source = -C_R(cell,ts)*C_VOF(cell,ts)/CURRENT_TIMESTEP*C_W(cell,tp) ;
dS[eqn] = -C_R(cell,ts)*C_VOF(cell,ts)/CURRENT_TIMESTEP ;
return source;
}

DEFINE_SOURCE(z_sec_recoil, cell, ts, dS, eqn)
{
real source;
Thread *tm = THREAD_SUPER_THREAD(ts);
source = -C_R(cell,ts)*C_VOF(cell,ts)/CURRENT_TIMESTEP*C_W(cell,ts) ;
dS[eqn] = -C_R(cell,ts)*C_VOF(cell,ts)/CURRENT_TIMESTEP ;
return source;
}

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4樓2013-02-01 12:44:16

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查看全部 6 個回答

b07988

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【答案】應(yīng)助回帖

★ ★ ★ ★
感謝參與，應(yīng)助指數(shù) +1
貍貓瑩光: 金幣+2, ★★★很有幫助 2013-02-01 10:04:49
xiegangmai: 金幣+2, 謝謝參與 2013-02-02 19:37:02

看看UDM打開沒？一般這樣的錯誤時內(nèi)存分配問題。既然不加氣相UDF源項可以計算，說明問題出現(xiàn)在那部分的udf。每一行都調(diào)試試試，就知道問題出現(xiàn)在哪一行的udf。

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先做最重要的事情，再做次重要的事情

2樓2013-01-31 22:00:35

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引用回帖:

2樓: Originally posted by b07988 at 2013-01-31 22:00:35
看看UDM打開沒？一般這樣的錯誤時內(nèi)存分配問題。既然不加氣相UDF源項可以計算，說明問題出現(xiàn)在那部分的udf。每一行都調(diào)試試試，就知道問題出現(xiàn)在哪一行的udf。

是直接用的幫助文件里面的，就是在氣相出口處劃出一個域，既作為液體入口，也用來脫氣，但液源項加載沒問題，但氣相加載就報錯...而且?guī)椭募锩娴脑捯矝]太看懂...第一相為氣相，但卻說移除第二相...

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3樓2013-02-01 10:14:08

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znon

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★ ★
xiegangmai: 金幣+2, 謝謝參與！ 2013-02-18 19:07:31

引用回帖:

4樓: Originally posted by 貍貓瑩光 at 2013-02-01 12:44:16
The following UDFs are used to define the bottom surface as a standard velocity inlet for the gas (primary)phase.The inlet VOF of the droplet phase is 0 and a negative source term for secondary phase ...

上面的回復(fù)已經(jīng)說了，你應(yīng)該開UDM。
如果實在不知道，將下面的藍線那句刪掉，再試。

DEFINE_SOURCE(degassing_source, cell, thread, dS, eqn)
{
real source;
Thread *tm = THREAD_SUPER_THREAD(thread);
source = -C_R(cell,thread)*C_VOF(cell,thread)/CURRENT_TIMESTEP ;
C_UDMI……
dS[eqn] = -C_R(cell,thread)/CURRENT_TIMESTEP;
return source;
}

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5樓2013-02-18 11:18:26

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