[AMBER] parameter problem for NVE/NPE or NPV ensemble

From: <nguyentb.bii.a-star.edu.sg>
Date: Thu, 04 Apr 2013 16:36:14 +0800

Dear all AMBER expert,

I'm an new user in AMBER, and hence, I have a lot of downs when
choosing parameter for particular ensemble.
I want to run NVE simulation, the paramaters I set are following:

prod
  &cntrl
   imin=0, # turn off minimixation = md
   irest=1, ntx=5, # restart calculation, requires velocities in
coordinate input file
   nstlim=5000000, # number of MD steps
   dt=0.002, # time step (ps)
   ntc=2, # flad for SHAKE, bonds involvimg hydrogen are contrained
   ntf=2, # force evaluation, bond interactions involing H-atoms omitted
   cut=14.0, # specific the nonbonded cutoff, in Angstroms
   ntb=1, # periodic boundary, constant volume
   taup = 0.1, # pressure relaxation time (in ps)
   ntpr=5000, # every ntpr steps energy information will be printed in
human-readable form to mdout file
   ntwx=5000, # every ntwx steps the coordinates will be written to mdcrd file
   ntt=0, # pure Newtonian dynamics
   ig = -1 # change the random number seed from the default on every MD restart
   temp0=300.0, # reference temperature
  /


Would you mind telling me whether the parameter is suitable for NVE
ensemble? If I choose taup = 0.1, does my simulation change to NPE or
NPV?
Do I need to set the ntp=0 and tempi=300.0? How about iwrap = 1,
tol=0.000001 (SHAKE) and dsum_tol to 10**-6 ?

Thank you in advance.
Regards,
Binh


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Received on Thu Apr 04 2013 - 02:00:03 PDT
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