[Nek5000-users] termination of simulation at high reynolds number

[nek5000-users at lists.mcs.anl.gov]

Try decreasing DT (timestep), as it seems like a CFL issue.

Best Regards,
Tanmoy

On Fri, Feb 26, 2016 at 11:12 PM, <nek5000-users at lists.mcs.anl.gov> wrote:

> Dear Sir
>
> I am currently running a simulation related to oscillating airfoil.
> Whenever I increase the reynolds number (>10000), the simulation stops
> running after few time steps showing the statement as shown below:
>
> Step   1652, t= 4.4604000E-02, DT= 2.7000000E-05, C=  2.938 4.2779E+03
> 3.4404E+00
>  Solving for fluid F T T
>        1652    Hmholtz VELX:     53   6.3582E-10   1.2153E+03   1.0000E-09
>        1652    Hmholtz VELY:     53   6.4018E-10   9.5397E+00   1.0000E-09
>       1652 U-PRES gmres:     64  9.9886E-08  1.0000E-07  4.8269E-01
> 8.7161E-01  2.3652E+00
>        1652   4.4604E-02  3.4916E+00 Fluid done
>  CFL, Ctarg!   5.4135660200985729       0.50000000000000000
>  call outfld: ifpsco: F
>
>      1653  4.4604E-02 Write checkpoint:
>
>      1653  4.4604E-02 OPEN:
> naca0012.fld05
>
>
>   Emergency exit:        1653    time =  4.46039999999989986E-002
>   Latest solution and data are dumped for post-processing.
>   *** STOP ***
>
> Kindly guide me on how to resolve this issue.
>
> T/R
> Prashanth Mohanasundaram
>
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