CFD Online Discussion Forums

CFD Online Discussion Forums (
-   Main CFD Forum (
-   -   "Continuous Memory" Errors in COSMOS FloWorks 2005 (

Dave November 14, 2005 11:47

"Continuous Memory" Errors in COSMOS FloWorks 2005
Hello all,

When solving more than about 500,000 cells, I always get an error similar to the one below--only the numbers change:

"Failed to allocate requested continuous memory block of 101980480 bytes (97.256 MB) due to memory fragmentation! Memory Diagnostic:

Largest Continous Available Memory Block 79755263 bytes (76.061 MB)

Requested Continous Memory Block 101980480 bytes (97.256 MB)"

I'm running a dual-core Athlon 64 4200+, 4GB RAM, latest student edition of Solidworks/Floworks for Windows XP. Solidworks/Floworks doesn't seem capable of using more than 2GB of RAM (even with 3GB Physical Address Extensions enabled in Windows), but that should still be enough to solve a 1 or 2 million cell problem, right?

I'm not a CFD engineer; just an ME student trying to analyze a race car's aerodynamics for a school project. I can't simplify the model much more than it already is.

Any help or advice is appreciated. Thank you.

Andrew Hayes November 14, 2005 12:10

Re: "Continuous Memory" Errors in COSMOS FloWorks
I think that might be a virtual memory error. I am not too sure how to tell Windows in what order to allocate memory, but you might want to try defragging your hd. Again, I am not sure if that will help. Also, you might want to try a smaller amount of cells. See if you get an answer, then increase the cells and see by what percentage your answer changes - sort of a 'number of cells' check

zxaar November 16, 2005 20:03

Re: "Continuous Memory" Errors in COSMOS FloWorks
i think it is related to memory allocation. The memory usually is allocated in continuous chunk of blocks. and the available block is smaller than needed so allocation fails.

All times are GMT -4. The time now is 22:19.