Requesting for your help regarding stopping and restarting the Calculation

[Dinesh Myilsamy]

Dear Friends,

        Currently I am working on simulating the compartment fire using FDS v.6.3.2. using LES Simulation and EDC Combustion Model  

       In my case, already the compartment will be filled with unburned hot gas mixture and there will be an ignition source at the corner of the compartment, after I opened the window  the fresh will get into the compartment due to density difference and when finally the fresh       air touches the ignition source, due to the reaction it will form rapid flame propagation. 

       However I couldn't make that rapid flame propagation by the continuous calculation,  so now I got an idea to STOP and RESTART the Calculation.

       -> For the first 4 seconds I didn't specify any reaction in my input file, until the air reaches the ignition source. 

       Input Condition: 

       &TIME T_END=4.0 /

       &DUMP DT_RESTART=0.4/ 

       &MISC RESTART=.FALSE.,

       TMPA=25.0, DNS=.FALSE.,

       CFL_MIN=0.00001, CFL_MAX=1.000 / 

    

        &MESH IJK= 181, 16, 11.5,  XB=-0.02,3.6,    0.0,0.32,     -0.02,0.21,

      after that I have restarted my calculation by specifying the "REAC" in my input file 

       Restart Input Condition:

         &TIME T_END=8.0 /

        &DUMP DT_RESTART=0.4/ 

        &MISC RESTART=.TRUE.,

        TMPA=25.0, DNS=.FALSE.,

         CFL_MIN=0.00001, CFL_MAX=1.000 / 

     

&MESH IJK= 181, 16, 11.5,  XB=-0.02,3.6,    0.0,0.32,     -0.02,0.21, 

    and when I try to restart the case with the above input I am getting an error like this

     

I kindly request you people to  give your valuable guidance

Best Regards,

Dinesh Myilsamy

[Randy McDermott]

Keeping in mind that EDC is not really designed to do partially premixed combustion in its default configuration in FDS (in other words, you are in research territory, and I hope you are validating your results)... I do not see the need for the DNS or CFL_MIN, CFL_MAX parameters.  If the case continues to fail, please submit an issue.

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[Kevin]

You cannot add REAC for a restart. When you restart a calculation, the basic inputs must remain the same. Only a few inputs can be changed.

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[Jack82]

Hello,

Are you sure of thuis mesh line        &MESH IJK= 181, 16, 11.5

I thought that only integer shall be used to define the number of meshes.

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