Primary Dendrite Arms spacing (PDAS) prediction

dendritic solidification, eutectics, peritectics,....
Bernd
Posts: 760
Joined: Mon Jun 23, 2008 9:29 pm

Re: Primary Dendrite Arms spacing (PDAS) prediction

Postby Bernd » Tue Oct 10, 2017 11:29 am

Hi Chamara,

it is difficult to say what is the reason for that. Obviously, you use moving frame, and each time one row of cells is moving out at the bottom of the domain, it is appended to the file NiCrFeNb_PDAS_Try25G.korn because you specified "out_Moving_Frame". When appending to this file, it has first to be opened, and this is what fails.
I could imagine that it is one of those:
- the file got too large to be opened
- another process / MICRESS job is accessing the file simultaneously
- your MICRESS job has no permission to open the file

As you say the file is very large, I would guess this could be the reason.
As .korn outputs have binary format, it is not astonishing that they are not "human readable" with notepad. To view its content you should use DP_MICRESS.

Bernd

CharMIC
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Re: Primary Dendrite Arms spacing (PDAS) prediction

Postby CharMIC » Tue Oct 10, 2017 4:12 pm

Hej Bernd,

Is it a limitation of MICRESS, not being able to read large file.

If I cannot reduce the resolution or the domain size, how can I overcome this issue.

BR
Chamara

Bernd
Posts: 760
Joined: Mon Jun 23, 2008 9:29 pm

Re: Primary Dendrite Arms spacing (PDAS) prediction

Postby Bernd » Tue Oct 10, 2017 4:29 pm

Hej Chamara,

it is not a limitation of MICRESS - if the problem is really that the size of this file is too big, it is the memory of your computer and your operation system which is limiting. Of course, you can switch off writing the full-size composit output by chosing "no_out_Moving_Frame"...

Keep in mind that the .korn files contain integer values and need to be uncompressed before appending. Thus, even if the compressed file does not seem too big, it may get huge when being uncompressed...

How big is the file actually? Can you open it with DP_MICRESS? How many lines have been scrolled out due to moving frame action (you can check in column 9 of the .TabL file)?


Bernd

CharMIC
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Joined: Mon Aug 21, 2017 5:01 pm
anti_bot: 333

Re: Primary Dendrite Arms spacing (PDAS) prediction

Postby CharMIC » Thu Oct 12, 2017 3:40 pm

Hej Bernd,

The file was about 25MB. Problem solved when I reduce the size.

I was not able to open it through DP_MICRESS. Perhaps it was the problem.

ralph
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anti_bot: 333

Re: Primary Dendrite Arms spacing (PDAS) prediction

Postby ralph » Thu Oct 12, 2017 4:20 pm

Hej Chamara,

you can influence the amount of main memory which DP_MICRESS uses with Options->Edit settings

Settings.png
Settings.png (37.02 KiB) Viewed 5 times


However, even if can open it with DP_MICRESS that does not help MICRESS when it runs out of memory.

Ralph


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