[AMBER] Timestep (dt) in TI calculations

From: Debarati DasGupta <debarati_dasgupta.hotmail.com>
Date: Sun, 8 Dec 2019 14:30:03 +0000

Hi,

In my equlibriation step( see input file below), I get *****energies when my dt = 0.002 or dt=0.001, but when I do dt =0.0005, things work smoothly.
Is there any issues I may be encountering with such a small time step, except the fact my simulations will take longer.
In my minimization, and heating input files dt =0.001 works fine.

Thanks

 &cntrl
    imin = 0, nstlim = 5000000, dt = 0.0005,
    irest = 1, ntx = 5, ig = -1,
    tempi = 300.0, temp0 = 300.0,
    ntc = 2, ntf = 1, tol = 0.00001,
    taup =1,
    ntwx = 1, ntwe = 0, ntwr = 1, ntpr = 1,
    cut = 10.0, iwrap = 1,
    ntt =3, ntb = 2, ntp = 1, gamma_ln=1.0,
    nscm = 0,
    ntr=1, restraintmask=':287', restraint_wt=100,
    icfe = 1, clambda = 0.5, ifsc=1,
    timask1=':C3N',timask2='',
     scmask1=':C3N', scmask2=''



_______________________________________________
AMBER mailing list
AMBER.ambermd.org
http://lists.ambermd.org/mailman/listinfo/amber
Received on Sun Dec 08 2019 - 07:00:04 PST
Custom Search