[giolab17]

I'm trying to modelling a natural gas combustion of a gas turbine implant, I used the FGM approach as combustion modeling and now I'm trying to simulate the NOx but Fluent gives me this error:

Node 15: Process 20399: Received signal SIGSEGV.
================================================== ============================
*** Error in `/opt/ansys_inc/v221/fluent/fluent22.1.0/lnamd64/3d_host/fluent.22.1.0': corrupted double-linked list: 0x0000000005324b20 ***
======= Backtrace: =========
/lib64/libc.so.6(+0x740ef)[0x7fcb1edfe0ef]
/lib64/libc.so.6(+0x79646)[0x7fcb1ee03646]
/lib64/libc.so.6(+0x799e2)[0x7fcb1ee039e2]
/lib64/libc.so.6(+0x7b315)[0x7fcb1ee05315]
/lib64/libc.so.6(__libc_malloc+0x50)[0x7fcb1ee073d0]
/lib64/libc.so.6(__backtrace_symbols+0x145)[0x7fcb1ee83f45]
/opt/ansys_inc/v221/fluent/fluent22.1.0/lnamd64/3d_host/fluent.22.1.0[0x227682d]
/lib64/libpthread.so.0(+0x10c10)[0x7fcb2f429c10]
/lib64/libc.so.6(+0x377cd)[0x7fcb1edc17cd]
/lib64/libc.so.6(+0x378b5)[0x7fcb1edc18b5]
/opt/ansys_inc/v221/fluent/fluent22.1.0/lnamd64/3d_host/fluent.22.1.0[0x22738de]
/lib64/libpthread.so.0(+0x10c10)[0x7fcb2f429c10]
/lib64/libpthread.so.0(read+0x2d)[0x7fcb2f428e2d]
/opt/ansys_inc/v221/fluent/fluent22.1.0/multiport/lnamd64/net/shared/libmport.so(mpt_read+0x31)[0x7fcb32329cb1]
/opt/ansys_inc/v221/fluent/fluent22.1.0/multiport/lnamd64/net/shared/libmport.so(mpt_tcpip_crecv_raw+0x5b)[0x7fcb3232b884]
/opt/ansys_inc/v221/fluent/fluent22.1.0/multiport/lnamd64/net/shared/libmport.so(mpt_tcpip_crecv_all+0x53)[0x7fcb3232a566]
/opt/ansys_inc/v221/fluent/fluent22.1.0/multiport/lnamd64/net/shared/libmport.so(MPT_crecv_float+0x514)[0x7fcb322f227f]
/opt/ansys_inc/v221/fluent/fluent22.1.0/multiport/lnamd64/net/shared/libmport.so(MPT_node_to_host_float+0x7c)[0x7fcb322f11fa]
/opt/ansys_inc/v221/fluent/fluent22.1.0/multiport/lnamd64/net/shared/libmport.so(mpnode_to_host_float_1+0x2b)[0x7fcb323406f1]
/opt/ansys_inc/v221/fluent/fluent22.1.0/lnamd64/3d_host/fluent.22.1.0(solver_update+0x3a1)[0xd6a9e1]
/opt/ansys_inc/v221/fluent/fluent22.1.0/lnamd64/3d_host/fluent.22.1.0[0xd6846f]
/opt/ansys_inc/v221/fluent/fluent22.1.0/lnamd64/3d_host/fluent.22.1.0[0x5c5705]
/opt/ansys_inc/v221/fluent/fluent22.1.0/lnamd64/3d_host/fluent.22.1.0(eval+0x497)[0x2290637]
/opt/ansys_inc/v221/fluent/fluent22.1.0/lnamd64/3d_host/fluent.22.1.0(eval+0x441)[0x22905e1]
/opt/ansys_inc/v221/fluent/fluent22.1.0/lnamd64/3d_host/fluent.22.1.0(eval+0x6cd)[0x229086d]
/opt/ansys_inc/v221/fluent/fluent22.1.0/lnamd64/3d_host/fluent.22.1.0(eval+0xd21)[0x2290ec1]
/opt/ansys_inc/v221/fluent/fluent22.1.0/lnamd64/3d_host/fluent.22.1.0[0x22916b6]
/opt/ansys_inc/v221/fluent/fluent22.1.0/lnamd64/3d_host/fluent.22.1.0(eval_errprotect+0x4e)[0x2291d8e]
/opt/ansys_inc/v221/fluent/fluent22.1.0/lnamd64/3d_host/fluent.22.1.0(eval+0x21f)[0x22903bf]
/opt/ansys_inc/v221/fluent/fluent22.1.0/lnamd64/3d_host/fluent.22.1.0(eval+0x487)[0x2290627]
/opt/ansys_inc/v221/fluent/fluent22.1.0/lnamd64/3d_host/fluent.22.1.0(eval+0x635)[0x22907d5]
/opt/ansys_inc/v221/fluent/fluent22.1.0/lnamd64/3d_host/fluent.22.1.0(eval+0xd21)[0x2290ec1]
/opt/ansys_inc/v221/fluent/fluent22.1.0/lnamd64/3d_host/fluent.22.1.0[0x22916b6]
/opt/ansys_inc/v221/fluent/fluent22.1.0/lnamd64/3d_host/fluent.22.1.0(eval_errprotect+0x4e)[0x2291d8e]
/opt/ansys_inc/v221/fluent/fluent22.1.0/lnamd64/3d_host/fluent.22.1.0(CX_Interpret_String+0x140)[0x2224f90]
/opt/ansys_inc/v221/fluent/fluent22.1.0/lnamd64/3d_host/fluent.22.1.0(fluent_main+0x95e)[0x85168e]
/opt/ansys_inc/v221/fluent/fluent22.1.0/lnamd64/3d_host/fluent.22.1.0(main+0x59)[0x870e29]
/lib64/libc.so.6(__libc_start_main+0xf5)[0x7fcb1edaa725]
/opt/ansys_inc/v221/fluent/fluent22.1.0/lnamd64/3d_host/fluent.22.1.0[0x59c5bf]
======= Memory map: ========
00400000-02a9e000 r-xp 00000000 08:01 6291477 /opt/ansys_inc/v221/fluent/fluent22.1.0/lnamd64/3d_host/fluent.22.1.0

and it continues for 15 pages...

Anyone as an idea how to fix this problem please?

[mz_uon]

At what point does this error occur?
When loading the CAS file or after starting the simulation?

[giolab17]

Originally Posted by mz_uon

At what point does this error occur?
When loading the CAS file or after starting the simulation?

It happens when I start the simulation with the NOx activated. Before calculating the NOx I remove all the equation except the Polluttant NOx.

Thanks.

[mz_uon]

Can you share more info about the memory allocation/ cores etc. of your setup?

[giolab17]

Originally Posted by mz_uon

Can you share more info about the memory allocation/ cores etc. of your setup?

Do you need this?

------------------------------------------------------------------------------
| Virtual Mem Usage (GB) | Resident Mem Usage(GB) |
ID | Current Peak | Current Peak | Page Faults
------------------------------------------------------------------------------
host | 1.15898 1.33029 | 0.472706 0.618607 | 0
n0 | 142.611 142.792 | 1.74395 1.82817 | 0
n1 | 2.32878 2.51062 | 1.65005 1.74502 | 0
n2 | 2.31655 2.49895 | 1.6329 1.72939 | 0
n3 | 2.31997 2.50045 | 1.63248 1.73335 | 0
n4 | 2.28981 2.47073 | 1.6018 1.70406 | 0
n5 | 2.31981 2.50012 | 1.63235 1.73429 | 0
n6 | 2.31869 2.49954 | 1.63285 1.7345 | 0
n7 | 2.29016 2.47083 | 1.60402 1.70488 | 0
n8 | 2.28972 2.47048 | 1.60323 1.70568 | 0
n9 | 2.32043 2.50182 | 1.63222 1.73629 | 0
n10 | 2.3242 2.50566 | 1.63775 1.74046 | 0
n11 | 2.3189 2.50032 | 1.6329 1.73513 | 0
n12 | 2.28753 2.46822 | 1.60212 1.70314 | 0
n13 | 2.27975 2.46129 | 1.58844 1.68555 | 0
n14 | 2.29048 2.47132 | 1.60395 1.70441 | 0
n15 | 2.32029 2.50102 | 1.63879 1.73484 | 0
n16 | 2.29201 2.47264 | 1.60579 1.70618 | 0
n17 | 2.31136 2.49139 | 1.62911 1.72474 | 0
n18 | 2.28972 2.471 | 1.60434 1.70204 | 0
------------------------------------------------------------------------------
| Virtual Mem Usage (GB) | Resident Mem Usage(GB) |
ID | Current Peak | Current Peak | Page Faults
------------------------------------------------------------------------------
n19 | 2.25644 2.43754 | 1.5685 1.66791 | 0
n20 | 2.27242 2.45305 | 1.58402 1.6843 | 0
n21 | 2.26451 2.4454 | 1.57593 1.67611 | 0
------------------------------------------------------------------------------
Total | 192.071 196.225 | 36.1102 38.439 | 0
------------------------------------------------------------------------------

------------------------------------------------------------------------------------------------
| Virtual Mem Usage (GB) | Resident Mem Usage(GB) | System Mem (GB)
Hostname | Current Peak | Current Peak |
------------------------------------------------------------------------------------------------
xxxxxx | 192.071 196.225 | 36.1102 38.439 | 125.841
------------------------------------------------------------------------------------------------
Total | 192.071 196.225 | 36.1102 38.439 |
------------------------------------------------------------------------------------------------

---------------------------------------------------------------------------------------
| CPU | System Mem (GB)
Hostname | Sock x Core x HT Clock (MHz) Load | Total Available
---------------------------------------------------------------------------------------
xxxxxx | 2 x 8 x 2 2600 14.74 | 125.841 41.603
---------------------------------------------------------------------------------------
Total | 32 - - | 125.841 41.603
---------------------------------------------------------------------------------------

[mz_uon]

So you are using 22 cores of your 32-core computer. The error you are getting is mostly due to not having enough memory for the simulation. Did you try increasing the processors for your parallel computing?

If that does not work either, then start Fluent in serial, and then partition the domain into as many cores you want to use. Increase the number of cores from within Fluent and assign the partitions. See if any of that helps.