Hands on

../images/grain_growth.0.png ../images/grain_growth.3.png ../images/grain_growth.28.png

Try these variations and make simple observations

  • Run lattice \(128\times 128,\; kT=1.25\)

  • Run lattice \(156\times 156,\; kT=.33\)

  • Try a different lattice type (tri)

  • If you have an mpi build of spparks

    mpiexec -np 2 spk_flame.gnu -var kT $kT -var N $N -var Q $Q < grain_growth.in

  • What does the energy column/tally imply?

       Time    Naccept    Nreject    Nsweeps        CPU     Energy
      0          0          0          0          0 8.3886e+06
55.8037    8151847          0         16       5.76 1.22051e+06
106.508   10436619          0         22       9.23     928128
150.774   11995846          0         27       14.4     794076
205.157   13620596          0         33       17.6     689672
251.346   14834712          0         38         21     624934
    300   15991604          0         44         26     572196

  • Change the number of spin values \(Q\)