Learning Forum

[PRABUPETER]

Dear sir,

I run a 2d vof fluid flow modeling of open channel flow. My case file could run well in the PC, when  i run the same in Cluster High performance computing, the simulation halts due to some reason as shown below. kindly help.

 

Reading journal file testp.jou...

 

> rcd NewTry.cas

 

Multicore SMT processors detected. Processor affinity set!

 

Reading "NewTry.cas"...

 

Buffering for file scan...

 

 

 

   15000 quadrilateral cells, zone  2, binary.

   29650 2D interior faces, zone  1, binary.

     700 2D wall faces, zone  5, binary.

   15351 nodes, binary.

15351 node flags, binary.

 

Building...

     mesh

auto partitioning mesh by Metis (fast),

distributing mesh

parts........,

faces........,

nodes........,

cells........,

        bandwidth reduction using Reverse Cuthill-McKee: 238/56 = 4.25

     materials,

     interface,

     domains,

mixture

air

water

interaction

     zones,

surface_body  (air)

interior-surface_body  (air)

wall-surface_body  (air)

surface_body  (water)

interior-surface_body  (water)

wall-surface_body  (water)

wall-surface_body

interior-surface_body

surface_body

     parallel,

Done.

 

Reading "NewTry.dat"...

 

 

 

Parallel variables...

 

Warning: More than one cell is equidistant from the specified reference pressure location.

         Reference pressure location will be chosen automatically; else

         specify a unique off-symmetry reference pressure location.

 

 turbulent viscosity limited to viscosity ratio of 1.000000e+05 in 6002 cells 

Done.

 

> /f as df Please answer y[es] or n[o].

100

Please answer y[es] or n[o].

 

Optimize file IO? [no] /f Please answer y[es] or n[o].

as Please answer y[es] or n[o].

cf Please answer y[es] or n[o].

e-t

Please answer y[es] or n[o].

 

Optimize file IO? [no] /f Please answer y[es] or n[o].

as Please answer y[es] or n[o].

r-m-r-f Please answer y[es] or n[o].

no

 

> /f as m-f Please answer y[es] or n[o].

2

Please answer y[es] or n[o].

 

Optimize file IO? [no] /f Please answer y[es] or n[o].

as Please answer y[es] or n[o].

r-n Please answer y[es] or n[o].

NewTry

Please answer y[es] or n[o].

 

Optimize file IO? [no] /solve Please answer y[es] or n[o].

dti Please answer y[es] or n[o].

2000 Please answer y[es] or n[o].

40

Please answer y[es] or n[o].

 

Optimize file IO? [no] /exit Please answer y[es] or n[o].

yes

 

> 

> Halting due to end of file on input.

 thanks

Prabu

[DrAmine]

It seems that it has some issues missing answer starting from the very first question. What you can do is to change the file batch options and to deselect Confirm File overwrite.

[PRABUPETER]

Dear Amine,

Thanks for the early response.

How to change the file batch option and how to deselect confirm file overwrite.

These things are new to me. Kindly help. Thanks.

Prabu

[Rob]

Post the journal, we won't debug it but may be able to spot the error and give some tips. 

Batch options are in the GUI under File or in the /file menu somewhere. 

 

[PRABUPETER]

Thanks rwoolhou,

Here is the journal file to run in High performance cluster.

rcd NewTry.cas

/f as df 100

/f as cf e-t

/f as r-m-r-f no

/f as m-f 2

/f as r-n NewTry

/solve dti 2000 40

/exit yes

 

Thank you

Prabu

 

[Rob]

I'd advise setting up the autosave in the case on your local machine and then the run journal reduces to 

 

/file/read-case-data NewTry.cas

 

etc

 

Also test the journal locally. As Amine mentions Fluent has asked a question but from the transcript it's not clear why. 

Only use journal shorthand when you're very experienced: some of the short hand commands can trigger commands other than what you're expecting. 

 

[PRABUPETER]

Thanks rwoolhou and Amine for the timely help.

Thanks rwoolhou for your suggestion on handling journal file. I think i have got the solution. I will try them and report back if it works

Thanks

Prabu

[PRABUPETER]

Dear rwoolhou and Amine,

I have set up the auto save as mentioned and then developed the cas and dat file. Then I tried to run in cluster high performance computer with the same script.

Fluent asks the same question again. This occurs only with the ANSYS FLUENT 2020,while it worked well with other previous versions. 

Kindly give some thought to it.

Thanks 

Prabu

 

[DrAmine]

Switch off this under file batch option as mentioned in my first message

[PRABUPETER]

Thanks rwoolhow and Amine. I fixed the error by using expanded journal commands and by turning off the set-batch options.

Thanks

Prabu