On 2/5/14, 11:05 AM, Steven Neumann wrote:
Maybe you know how do they keep nanotubes rigid then?


Nope, sorry.

-Justin


On Wed, Feb 5, 2014 at 3:58 PM, Steven Neumann <s.neuman...@gmail.com
<mailto:s.neuman...@gmail.com>> wrote:

    Thank you. Can you specify what does long mean? Is there any limit?


    On Wed, Feb 5, 2014 at 3:49 PM, Justin Lemkul <jalem...@vt.edu
    <mailto:jalem...@vt.edu>> wrote:



        On 2/5/14, 10:46 AM, Steven Neumann wrote:

            Can you please advise? With large constraints it does not work... 
with [
            distance_restraints ] it works but only with mdrun -nt 1
            my mdp:

            disre                =  simple
            disre-fc             =  1000

            integrator               = md
            tinit                    = 0.0
            dt                       = 0.008
            nsteps                   = 100000      ; 500 ns
            nstcomm                  = 100
            nstcalcenergy         = 100

            nstxout             = 0
            nstvout               = 0
            nstenergy            = 0
            nstlog                   = 100
            nstxtcout                = 100

            freezegrps         = System
            freezedim          = N N Y
            energygrps               = ACI BAS GLY NON POL
            energygrp_table          = ACI ACI ACI BAS ACI GLY ACI NON ACI POL
            BAS BAS
            BAS GLY GLY GLY GLY NON GLY POL NON BAS NON NON POL BAS POL NON POL 
POL
            table-extension         = 1.0


            nstlist                  = 10
            ns_type                  = grid
            pbc                      = xyz
            rlist                    = 2.0


            coulombtype          = User
            rcoulomb                 = 2.0

            vdw_type                 = User
            rvdw                     = 2.0


            tcoupl               = V-rescale
            tc_grps               = System
            tau_t                 = 0.1
            ref_t                 = 300
            pcoupl             = no

            gen_vel                  = yes
            gen_temp                 = 300
            gen_seed                 = -1


            constraints              = none
            constraint_algorithm     = Lincs
            continuation             = no
            lincs_iter              = 1
            lincs_order              = 4





            I will really appreciate.


        DD cells are set up based on bonded geometry and a host of other
        factors.  Any very long bond or restraint will seriously inhibit the
        ability of DD to function.

        -Justin

        --
        ==============================__====================

        Justin A. Lemkul, Ph.D.
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--
==================================================

Justin A. Lemkul, Ph.D.
Postdoctoral Fellow

Department of Pharmaceutical Sciences
School of Pharmacy
Health Sciences Facility II, Room 601
University of Maryland, Baltimore
20 Penn St.
Baltimore, MD 21201

jalem...@outerbanks.umaryland.edu | (410) 706-7441
http://mackerell.umaryland.edu/~jalemkul

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