Re: [gmx-users] Turning off electrostatic or Van der Waals interactions

2009-02-24 Thread Lee Soin
ate: Tue, 24 Feb 2009 09:49:25 +0200 > Subject: Re: [gmx-users] Turning off electrostatic or Van der Waals > interactions > From: omer...@gmail.com > To: gmx-users@gromacs.org > > > Why not create "dummy" topologies, without charges/vdw ? > Another option, whi

RE: [gmx-users] Turning off electrostatic or Van der Waals interactions

2009-02-24 Thread Berk Hess
Hi, Setting epsilon_r = 0 in your mdp file will turn off all electrostatics. If you are concerned about efficiency, you should set all charges in your topology to zero. Berk Date: Tue, 24 Feb 2009 09:49:25 +0200 Subject: Re: [gmx-users] Turning off electrostatic or Van der Waals

Re: [gmx-users] Turning off electrostatic or Van der Waals interactions

2009-02-23 Thread Omer Markovitch
Why not create "dummy" topologies, without charges/vdw ? Another option, which I am not sure of its effect, is, perhaps, to take extremely small cutoffs. --Omer. > Lee Soin wrote: > >> I'm trying to rule out the effect of electrostatic or Van der Waals >> interactions while performing a simulatio

Re: [gmx-users] Turning off electrostatic or Van der Waals interactions

2009-02-23 Thread Justin A. Lemkul
Lee Soin wrote: I'm trying to rule out the effect of electrostatic or Van der Waals interactions while performing a simulation. Do you mean that I should modify the code and re-compile? No, I mean use the free energy options in the .mdp file. You may be able to use a B-state in the topol

Re: [gmx-users] Turning off electrostatic or Van der Waals interactions

2009-02-23 Thread Lee Soin
I'm trying to rule out the effect of electrostatic or Van der Waals interactions while performing a simulation. Do you mean that I should modify the code and re-compile? 2009/2/23 Justin A. Lemkul > > > Lee Soin wrote: > >> Hi! >> Is there an option to turn off electrostatic or Van der Waals int

Re: [gmx-users] Turning off electrostatic or Van der Waals interactions

2009-02-23 Thread Justin A. Lemkul
Lee Soin wrote: Hi! Is there an option to turn off electrostatic or Van der Waals interactions in GROMACS? Look into the free energy code; if this is not your intent, be more specific with what you are trying to do. -Justin -- Sun Li Department of Physics Nanjing University, China -