Error memory allocation on heat exchanger simulation
 

Hi,
I'm currently doing 2 analysis on heat exchanger for my lab and found a problem when running the files.

On the first case i got:
ERROR #001100279 has occurred in subroutine ErrAction.
| Message:
| The intersection algorithm runs out of memory. Please run again with increased memory settings.
before the first iteration even started.

On the second, a new type message appeared after the first iteration:
*** INSUFFICIENT MEMORY ALLOCATED *** |
| |
| ACTION REQUIRED : Increase the integer stack memory size. |
| |
| Details : |
| Requested space : 205246221 words |
| Current allocated space : 251853328 words |
| Current used space : 110020239 words |
| Current free space : 141833089 words |
| Number of free areas : 2

Are both problems caused by lack of RAM or harddisk space on my computer system? or could there be a solution for this without having to upgrade the hardware?
I'm working on a i7 2600k with 8 gb of RAM.
Thank you for any information on this matter.

Both error messages tell you what to do to address the problem. Neither errors are due to physical RAM or HD, just that the internal memory allocation was inadequate and needs to be increased.

Thank you for the information. :)
I have manage to increase the memory allocation for the second case to 1.4. For the first case, i still havent able to find any information about intersection algorithm or how to increase memory setting (as suggested in the error) in the CFX help/manual. I typed every keyword i could figure in the search tab. Do i have to write something in the code or there is an option/tab in the CFX GUI to increase the memory setting?

Can you post the output file from the first one?

this is the output file from the one first one before i tried to increase memory allocation to 1.4. I increased it but still same error.

+--------------------------------------------------------------------+
| |
| Partitioning |
| |
+--------------------------------------------------------------------+




+--------------------------------------------------------------------+
| |
| ANSYS CFX Partitioner 12.1 |
| |
| Version 2009.10.14-23.08 Thu Oct 15 00:45:24 GMTDT 2009 |
| |
| Executable Attributes |
| |
| single-int32-64bit-novc8-noifort-novc6-optimised-supfort-noprof-nos|
| |
| Copyright 2009 ANSYS Inc. |
+--------------------------------------------------------------------+





+--------------------------------------------------------------------+
| Job Information |
+--------------------------------------------------------------------+

Run mode: partitioning run

Host computer: IRFAN-PC
Job started: Tue Jan 17 00:06:15 2012


+--------------------------------------------------------------------+
| Memory Allocated for Run (Actual usage may be less) |
+--------------------------------------------------------------------+

Data Type Kwords Words/Node Words/Elem Kbytes Bytes/Node

Real 205477.7 87.71 32.04 802647.2 350.84
Integer 242182.2 103.38 37.76 946024.0 413.51
Character 3273.0 1.40 0.51 3196.3 1.40
Logical 65.0 0.03 0.01 253.9 0.11
Double 1200.5 0.51 0.19 9378.9 4.10

+--------------------------------------------------------------------+
| ERROR #001100279 has occurred in subroutine ErrAction. |
| Message: |
| The intersection algorithm runs out of memory. Please run again w- |
| ith increased memory settings. |
| |
| |
| |
| |
+--------------------------------------------------------------------+

+--------------------------------------------------------------------+
| ERROR #001100279 has occurred in subroutine ErrAction. |
| Message: |
| Stopped in routine ILOCCS |
| |
| |
| |
| |
| |
+--------------------------------------------------------------------+

+--------------------------------------------------------------------+
| An error has occurred in cfx5solve: |
| |
| The ANSYS CFX partitioner exited with return code 1. |
+--------------------------------------------------------------------+


This run of the ANSYS CFX Solver has finished.

If you start from solver manager go to the advanced tab and partitioner, the memory settings are there. If you start from the command line look at the partitioner memory settings in the documentation.

So its the same place where to increase the memory allocation? Ok, i'll try it. Do you have any pdf or manual i can read about integer memory etc? so i can guess what appropriate number i'll have to set the integer memory, real memory etc.
Once again, thank you for the info.

No, not the same place. This is in the partitioner section. The stack size settings you adjusted for the other error will not affect this one.

Hi! I'm facing the same problem as irfan:

I increased the allocated memory by 2.0x and so far, the error didn't occur again. However, I'm wondering if the increase will have a effect on the performance of my simulation, i.e. will a simulation with a high allocated memory be slower than a simulation with a low allocated memory? How can I find out how much allocated memory my simulation requires?

Furthermore, what does the error message tell me exactly? As far as I understand, I do have an allocated memory of 2801744 words. Currently, I'm using 2762573 word, which means I have 2801744 - 2762573 = 39171 word free. Now, the solver requests 32032. However, 32032 < 39171, so why is is there insufficient memory allocated, when the requested space < than the current free space? Also, what does 'Number of free ares mean'?

It is dealing with the internal memory handling of CFX and that is quite complex. But if you are still getting this error after using factors like 2x then you have a fundamental problem in your simulation. It is having a hard time getting something to work - is your mesh quality good? Do you have complex interfaces? Do you have complex physics models?

CFX error on heat exchanger
 

Hi,
I'm doing analysis on heat exchanger and found a problem when running the files. this error be shown as follow :


ERROR #001100279 has occurred in subroutine ErrAction.

The intersection algorithm runs out of memory. This can be caused

by insufficient INTEGER and/or REAL memory. Please run again
with increased memory settings.



ERROR #001100279 has occurred in subroutine ErrAction.
Stopped in routine ILOCCS

An error has occurred in cfx5solve:

The ANSYS CFX partitioner exited with return code 1.

my computer information s :
Ram : 4 GB

Please Help me !!!:(:(:(

In the solver manager look at the advanced tab and increase the real and integer stack sizes.

CFX Error
 

hi dear ghorrocks and thank you for your answer
when i deleted the interfaces of domains, simulation was run
but when i activated the interfaces perevious error repeated

ERROR #001100279 has occurred in subroutine ErrAction.

The intersection algorithm runs out of memory. This can be caused

by insufficient INTEGER and/or REAL memory. Please run again
with increased memory settings.



ERROR #001100279 has occurred in subroutine ErrAction.
Stopped in routine ILOCCS

An error has occurred in cfx5solve:

The ANSYS CFX partitioner exited with return code 1.

how can i change the real and integer memories ?
how much real / integer memory is needed for this simulation?
thank you for your attention :)

You just increase the stack sizes as the error recommends. If you need to go larger than about 4x though something is seriously wrong and you better fix the root cause of the problem rather than just trying to get it to run anyway.

cfx error
 

hi dear ghorrocks and thank you for your answer



I increaseded the integer memory then run it , but the following error was shown

ERROR #001100279 has occurred in subroutine ErrAction.
Message:
SYMASS_ZIFCS_EL : The solver ran out of temporary space while bui- lding a linked list for a domain interface. Try setting the expe-
rt parameter "topology estimate factor zif" to a value greater th-
an 1.0. Values higher than 1.2 should not be necessary.

ERROR #001100279 has occurred in subroutine ErrAction.
Message:
Stopped in routine SYMASS_ERROR



An error has occurred in cfx5solve:
The ANSYS CFX solver exited with return code 1. No results file
has been created.

please help me!!!!!!!!!!!!!:(



thank you for your attention :)

That error can be addressed in the expert parameter section. Just do as it says.