$Id: README,v 1.10 2020/04/27 20:00:00 brandenb Exp $ Run directory: pencil-code/axel/forced/Bkm1Pot/H1152km1c_B01 1478280 # RUN STARTED on beskow-login4 Sun Feb 26 01:45:06 CET 2017 pencil-code/axel/forced/imposed/idl pencil-code/axel/forced/imposed/JH1152c pencil-code/axel/forced/imposed/1152a pencil-code/axel/forced/imposed/I1152kf180d1 > 1. For the runs with names starting with IH1152, we have an imposed field, and a kinetic forcing (with positive helicity) at k=60. > Here, both the magnetic fields and the kinetic fields develop a spectrum (k^2). > The magnetic helicity is unchanged (zero) while the kinetic and current helicities rise and then drop to zero sometime after the forcing ends. yes > 2. For the runs with names starting with JH1152, we have an initial spectrum (k^4 followed by k^{-1}). > There is kinetic forcing as before (till t=5), and the magnetic spectrum was became shallower (k^2), which was surprising. > The magnetic field was nonhelical. we also have magnetic forcings (helical AND nonhelical) > I think I was probably unclear/incomplete on some of these points. As far as I understand, you also have made runs with nohelical forcings on the above, too. perhaps only for the magnetically forced runs > In addition, did we have runs with a magnetic field with a monochromatic spectrum at k \neq 0? Also, sorry if I understand this incorrectly - for all our runs, we have a nonzero initial velocity field, is that right? I will check in more updates very soon. drwxr-xr-x 5 brandenb brandenb 4.0K Sep 13 04:17 IH1152c2 B0=0.1, kin, sig=1 drwxr-xr-x 5 brandenb brandenb 4.0K Sep 12 20:33 I1152d B0=0.0, mag, sig=0 drwxr-xr-x 5 brandenb brandenb 4.0K Sep 12 20:32 I1152f B0=0.0, mag, sig=0 drwxr-xr-x 5 brandenb brandenb 4.0K Sep 12 19:27 IH288d B0=0.1, kin, sig=-1 drwxr-xr-x 5 brandenb brandenb 4.0K Sep 12 19:11 J1152a3 ini k-1 spectr (sig=0), mag, sig=1, sept drwxr-xr-x 5 brandenb brandenb 4.0K Sep 12 19:10 J1152o3 ini k-1 spectr (sig=0), mag, sig=0, sept, force=0.002 abm=1.3e-4 drwxr-xr-x 4 brandenb brandenb 4.0K Sep 11 20:58 J1152o2 ini k-1 spectr (sig=0), mag, sig=0, sept, force=0.005 drwxr-xr-x 4 brandenb brandenb 4.0K Sep 11 20:56 J1152a2 ini k-1 spectr (sig=0), mag, sig=1, sept drwxr-xr-x 5 brandenb brandenb 4.0K Sep 11 13:19 J1152a ini k-1 spectr (sig=0), mag, sig=1, sept, force=0.02 (too strong) drwxr-xr-x 4 brandenb brandenb 4.0K Sep 11 13:18 J1152o ini k-1 spectr (sig=0), mag, sig=0, sept, force=0.02 (too strong) drwxr-xr-x 5 brandenb brandenb 4.0K Sep 9 21:24 JH1152a ini k-1 spectr (sig=0), KIN, sig=1, sept, force=0.02 drwxr-xr-x 5 brandenb brandenb 4.0K Sep 9 20:59 H1152b B0=0.1, kin, sig=1, kf=180 (not 60) drwxr-xr-x 5 brandenb brandenb 4.0K Sep 9 20:56 IH1152d B0=0.1, kin, sig=-1 drwxr-xr-x 5 brandenb brandenb 4.0K Sep 9 17:27 JH1152b ini k-1 spectr (sig=0), kin, sig=1, may drwxr-xr-x 5 brandenb brandenb 4.0K Sep 9 17:27 JH1152c ini k-1 spectr (sig=0), kin, sig=1, may drwxr-xr-x 4 brandenb brandenb 4.0K Sep 9 16:44 IH288d2 ini k-1 spectr (sig=0), KIN, sig=-1, sept, force=0.02 drwxr-xr-x 5 brandenb brandenb 4.0K Sep 9 15:42 IH1152a B0=0.1, kin, sig=1 drwxr-xr-x 5 brandenb brandenb 4.0K Sep 9 15:28 IH1152c B0=0.1, kin, sig=1 drwxr-xr-x 4 brandenb brandenb 4.0K May 30 10:05 H1152a3 drwxr-xr-x 5 brandenb brandenb 4.0K May 30 09:00 H1152a2 pencil-code/axel/forced/imposed/idl *pencil-code/axel/forced/imposed/J1152kf180c 1/k spectrum with amplaa=1e-3, non-helical force=0.0005, relhel=1., tforce_stop=5., nu=1e-5 inverse cascade long lived J1152kf180b amplaa=1e-2 ic ok J1152kf180a2 amplaa=3e-2 ic ok final field 0.2 I1152kf180b3 iforce='helical', force=0.0005, relhel=1. B_ext=.0, .0, 1. no power at k=1 *I1152kf180a2 B_ext=.0, .0, .1 inverse cascade stalls half way \includegraphics[width=0.49\textwidth]{pkt1152_I1152kf180a2} \includegraphics[width=0.49\textwidth]{pkt1152_I1152kf180b3} \includegraphics[width=0.49\textwidth]{pkt1152_J1152kf180c} \includegraphics[width=0.49\textwidth]{pkt1152_J1152kf180a2} Inverse cascade runs: B0=0.1 pencil-code/axel/forced/imposed/I1152kf180a2 B0=1 pencil-code/axel/forced/imposed/I1152kf180b3 pencil-code/axel/forced/imposed/ J1152kf180c pencil-code/axel/forced/imposed/ J1152kf180a2 pEkM2 ----------------------------------------------------------------------------- intermediate runs with imposed field: pencil-code/axel/forced/imposed/I1152kf180g1 (Sat Jan 25 23:14:46 CET 2020) stalls at k=20, after having rushed from 180 to smaller values. iforce='helical', force=0.0005, relhel=1. B_ext=.0, .0, .14 I1152kf180j1 (Sat Jan 25 23:13:20 CET 2020) stalls completely I1152kf180a2 I1152kf180b3