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FLUENT received fatal signal (ACCESS_VIOLATION) |
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August 6, 2009, 09:41 |
FLUENT received fatal signal (ACCESS_VIOLATION)
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#1 |
New Member
chaker rym
Join Date: Mar 2009
Posts: 14
Rep Power: 17 |
Hi everyone,
i have to simulate a stirred tank with turbulent multiphase flow, the problem is when i stoped the similuation and i want to restart it, a message of error appears 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: () please any idea??? |
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August 6, 2009, 11:10 |
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#2 |
New Member
krisp
Join Date: Aug 2009
Posts: 5
Rep Power: 17 |
It might be due to:
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December 10, 2015, 07:10 |
Udf run problem
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#3 |
New Member
Delhi (IN-DL)
Join Date: Dec 2015
Posts: 2
Rep Power: 0 |
Hello I am Kuldeep Kumar. I am new with Ansys flunet. I am writing a udf for the heat exchage process. I am going step by step. Here i am writing a simple udf code for temperature and pressure source calculation, but this is showing error as given below :
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: #f My simple udf code is given as: DEFINE_EXECUTE_AT_END(source_calculation) { Domain *d; Thread *t; cell_t c; real time = CURRENT_TIME; real temp, Pg, abrate, Peqa, Peqd, mab, mde, m,volume; real xc[ND_ND]; int zone=2; d = Get_Domain(1); t=Lookup_Thread(d,zone); begin_c_loop(c,t) { temp=C_T(c,t); Pg= C_P(c,t); Peqa=1000*exp(Aab-Bab/temp); mab=-Ca*exp(-Ea/(Rg*temp))*log(Pg/Peqa)*(Psat-Pemp); } end_c_loop(c,t); } Can anybody me about this problem ? |
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December 10, 2015, 11:17 |
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#4 |
Senior Member
Lucky
Join Date: Apr 2011
Location: Orlando, FL USA
Posts: 5,754
Rep Power: 66 |
This type of error is encountered when Fluent tries to do something and then finds out that it didn't do it. Unfortunately the error is empty "Error Object: #f" so we have no clue what it is. It could have been anything.
Is the error persistent and is it always encountered at the same point? If it was a one time error then I'd say move along because this error can randomly occur from time to time. Usually it's the OS's fault with the job scheduler. Running more than one task can cause Fluent to hang. |
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December 11, 2015, 04:20 |
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#5 |
Senior Member
Join Date: Nov 2013
Posts: 1,965
Rep Power: 27 |
Your udf tries to get temperatures and pressures from cells in zone 2. This could fail in many ways:
1. Zone 2 does not exist. 2. Zone 2 exists, but has no cells but faces (it is for example a wall). 2. Zone 2 exists and has cells, but no temperatures (you are simulating without energy equation). Furthermore, does your code know what Aab, Bab, Ca, Ea, Rg, Psat and Pemp are? I don't see them anywhere defined in your code (maybe you omitted that part...) By the way: your udf does not give any output the way you programmed it now. |
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