[gmx-users] Making composite box in gromacs

2013-03-31 Thread Abhinav Agrawal
I have polymer and clay structures and I need to study their surface
interaction. How do I keep a clay box on top of polymer.

Thanks in advance.
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Re: [gmx-users] Making composite box in gromacs

2013-03-31 Thread Justin Lemkul



On 3/31/13 6:38 AM, Abhinav Agrawal wrote:

I have polymer and clay structures and I need to study their surface
interaction. How do I keep a clay box on top of polymer.



The concepts of top and bottom are irrelevant in a periodic system.  You can 
position anything within the unit cell wherever you like with editconf -center.


-Justin

--


Justin A. Lemkul, Ph.D.
Research Scientist
Department of Biochemistry
Virginia Tech
Blacksburg, VA
jalemkul[at]vt.edu | (540) 231-9080
http://www.bevanlab.biochem.vt.edu/Pages/Personal/justin


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Re: [gmx-users] Making composite box in gromacs

2013-03-31 Thread Justin Lemkul



On 3/31/13 2:22 PM, Abhinav Agrawal wrote:

Actually my doubt was how to make a simulation box from two structure files
i.e. how do i keep the clay and poymer boxes close to each other to run
energy minimization



Consider the following:

http://www.bevanlab.biochem.vt.edu/Pages/Personal/justin/gmx-tutorials/biphasic/index.html

The logic holds for any interfacial or inhomogeneous system.  Place whatever 
species you want, wherever you want them in the box, with editconf -center, 
-translate, -rotate, etc as necessary.


-Justin


  Message: 4

Date: Sun, 31 Mar 2013 07:38:38 -0400
From: Justin Lemkul jalem...@vt.edu
Subject: Re: [gmx-users] Making composite box in gromacs
To: Discussion list for GROMACS users gmx-users@gromacs.org
Message-ID: 5158203e.3020...@vt.edu
Content-Type: text/plain; charset=ISO-8859-1; format=flowed



On 3/31/13 6:38 AM, Abhinav Agrawal wrote:

I have polymer and clay structures and I need to study their surface
interaction. How do I keep a clay box on top of polymer.



The concepts of top and bottom are irrelevant in a periodic system.
  You can
position anything within the unit cell wherever you like with editconf
-center.

-Justin

--


Justin A. Lemkul, Ph.D.
Research Scientist
Department of Biochemistry
Virginia Tech
Blacksburg, VA
jalemkul[at]vt.edu | (540) 231-9080
http://www.bevanlab.biochem.vt.edu/Pages/Personal/justin





--


Justin A. Lemkul, Ph.D.
Research Scientist
Department of Biochemistry
Virginia Tech
Blacksburg, VA
jalemkul[at]vt.edu | (540) 231-9080
http://www.bevanlab.biochem.vt.edu/Pages/Personal/justin


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