Re: [gmx-users] BD with Hydrodynamic interactions?

2011-09-26 Thread Dommert Florian
On Sun, 2011-09-25 at 14:03 -0700, Sanku M wrote: 
 Hi,
   I was wondering whether BD simulation integrator in Gromacs also
 have option of including hydrodynamic interactions.

Hello,

I do not think, that Gromacs has something like Lattice-Boltzmann
implemented so far. Furthermore you would need a momentum-conserving
method for the calculation of the electrostatic forces, which is not
given with the analytical differentiation of SPME, that conserves only
energy and not momentum.

/Flo

 Sanku
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-- 
Florian Dommert
Dipl. - Phys.

Institute for Computational Physics
University Stuttgart

Pfaffenwaldring 27
70569 Stuttgart

EMail: domm...@icp.uni-stuttgart.de
Homepage: http://www.icp.uni-stuttgart.de/~icp/Florian_Dommert

Tel.: +49 - (0)711 - 68563613
Fax.: +49 - (0)711 - 68563658


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[Fwd: Re: [gmx-users] BD with Hydrodynamic interactions?]

2011-09-26 Thread Dommert Florian
 Forwarded Message 
From: Sanku M msank...@yahoo.com
Reply-to: Sanku M msank...@yahoo.com
To: Dommert Florian domm...@icp.uni-stuttgart.de
Subject: Re: [gmx-users] BD with Hydrodynamic interactions?
Date: Mon, 26 Sep 2011 04:07:38 -0700 (PDT)

 I did not mean lattice boltzmann by BD.  By BD I meant Brownian
Dynamics. In general, for accuracy in dynamics,  one uses  hydrodynamic
interaction in brownian dynamics simulation. I  was wondering whether
hydrodynamic interaction is invoked in gromacs   implementation of
brownian dynamics simulation. 
Please keep correspondence on the mailing list. So how do want to
include hydrodynamic interactions into BD ? I think the
Lattice-Boltzmann method is a way to do this isn't it ?

/Flo




From: Dommert Florian domm...@icp.uni-stuttgart.de
To: Sanku M msank...@yahoo.com; Discussion list for GROMACS users
gmx-users@gromacs.org
Sent: Monday, September 26, 2011 3:38 AM
Subject: Re: [gmx-users] BD with Hydrodynamic interactions?

On Sun, 2011-09-25 at 14:03 -0700, Sanku M wrote: 
 Hi,
  I was wondering whether BD simulation integrator in Gromacs also
 have option of including hydrodynamic interactions.

Hello,

I do not think, that Gromacs has something like Lattice-Boltzmann
implemented so far. Furthermore you would need a momentum-conserving
method for the calculation of the electrostatic forces, which is not
given with the analytical differentiation of SPME, that conserves only
energy and not momentum.

/Flo

 Sanku
 -- 
 gmx-users mailing listgmx-users@gromacs.org
 http://lists.gromacs.org/mailman/listinfo/gmx-users
 Please search the archive at
http://www.gromacs.org/Support/Mailing_Lists/Search before posting!
 Please don't post (un)subscribe requests to the list. Use the 
 www interface or send it to gmx-users-requ...@gromacs.org.
 Can't post? Read http://www.gromacs.org/Support/Mailing_Lists


-- 
Florian Dommert
Dipl. - Phys.

Institute for Computational Physics
University Stuttgart

Pfaffenwaldring 27
70569 Stuttgart

EMail: domm...@icp.uni-stuttgart.de
Homepage: http://www.icp.uni-stuttgart.de/~icp/Florian_Dommert

Tel.: +49 - (0)711 - 68563613
Fax.: +49 - (0)711 - 68563658




-- 
Florian Dommert
Dipl. - Phys.

Institute for Computational Physics
University Stuttgart

Pfaffenwaldring 27
70569 Stuttgart

EMail: domm...@icp.uni-stuttgart.de
Homepage: http://www.icp.uni-stuttgart.de/~icp/Florian_Dommert

Tel.: +49 - (0)711 - 68563613
Fax.: +49 - (0)711 - 68563658


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Re: [gmx-users] BD with Hydrodynamic interactions?

2011-09-26 Thread Sanku M
I did not mean lattice boltzmann by BD.
 By BD I meant Brownian Dynamics. In general, for accuracy in dynamics, one 
uses  hydrodynamic interaction in brownian dynamics simulation. I was wondering 
whether hydrodynamic interaction is invoked in gromacs implementation of 
brownian dynamics simulation.



From: Sanku M msank...@yahoo.com
To: Dommert Florian domm...@icp.uni-stuttgart.de
Sent: Monday, September 26, 2011 6:07 AM
Subject: Re: [gmx-users] BD with Hydrodynamic interactions?


I did not mean lattice boltzmann by BD.
 By BD I meant Brownian Dynamics. In general, for accuracy in dynamics, one 
uses  hydrodynamic interaction in brownian dynamics simulation. I was wondering 
whether hydrodynamic interaction is invoked in gromacs implementation of 
brownian dynamics simulation.



From: Dommert Florian domm...@icp.uni-stuttgart.de
To: Sanku M msank...@yahoo.com; Discussion list for GROMACS users 
gmx-users@gromacs.org
Sent: Monday, September 26, 2011 3:38 AM
Subject: Re: [gmx-users] BD with Hydrodynamic interactions?

On Sun, 2011-09-25 at 14:03 -0700, Sanku M wrote: 
 Hi,
   I was wondering whether BD simulation integrator in Gromacs also
 have option of including hydrodynamic interactions.

Hello,

I do not think, that Gromacs has something like Lattice-Boltzmann
implemented so far. Furthermore you would need a momentum-conserving
method for the calculation of the electrostatic forces, which is not
given with the analytical differentiation of SPME, that conserves only
energy and not momentum.

/Flo

 Sanku
 -- 
 gmx-users mailing list    gmx-users@gromacs.org
 http://lists.gromacs.org/mailman/listinfo/gmx-users
 Please search the archive at 
 http://www.gromacs.org/Support/Mailing_Lists/Search before posting!
 Please don't post (un)subscribe requests to the list. Use the 
 www interface or send it to gmx-users-requ...@gromacs.org.
 Can't post? Read http://www.gromacs.org/Support/Mailing_Lists


-- 
Florian Dommert
Dipl. - Phys.

Institute for Computational Physics
University Stuttgart

Pfaffenwaldring 27
70569 Stuttgart

EMail: domm...@icp.uni-stuttgart.de
Homepage: http://www.icp.uni-stuttgart.de/~icp/Florian_Dommert

Tel.: +49 - (0)711 - 68563613
Fax.: +49 - (0)711 - 68563658-- 
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Re: [gmx-users] BD with Hydrodynamic interactions?

2011-09-26 Thread Mark Abraham

On 26/09/2011 11:59 PM, Sanku M wrote:

I did not mean lattice boltzmann by BD.
 By BD I meant Brownian Dynamics. In general, for accuracy in 
dynamics, one uses  hydrodynamic interaction in brownian dynamics 
simulation. I was wondering whether hydrodynamic interaction is 
invoked in gromacs implementation of brownian dynamics simulation.


The manual section of BD doesn't mention it, so very probably not.

Mark




*From:* Sanku M msank...@yahoo.com
*To:* Dommert Florian domm...@icp.uni-stuttgart.de
*Sent:* Monday, September 26, 2011 6:07 AM
*Subject:* Re: [gmx-users] BD with Hydrodynamic interactions?

I did not mean lattice boltzmann by BD.
 By BD I meant Brownian Dynamics. In general, for accuracy in 
dynamics, one uses  hydrodynamic interaction in brownian dynamics 
simulation. I was wondering whether hydrodynamic interaction is 
invoked in gromacs implementation of brownian dynamics simulation.



*From:* Dommert Florian domm...@icp.uni-stuttgart.de
*To:* Sanku M msank...@yahoo.com; Discussion list for GROMACS users 
gmx-users@gromacs.org

*Sent:* Monday, September 26, 2011 3:38 AM
*Subject:* Re: [gmx-users] BD with Hydrodynamic interactions?

On Sun, 2011-09-25 at 14:03 -0700, Sanku M wrote:
 Hi,
  I was wondering whether BD simulation integrator in Gromacs also
 have option of including hydrodynamic interactions.

Hello,

I do not think, that Gromacs has something like Lattice-Boltzmann
implemented so far. Furthermore you would need a momentum-conserving
method for the calculation of the electrostatic forces, which is not
given with the analytical differentiation of SPME, that conserves only
energy and not momentum.

/Flo

 Sanku
 --
 gmx-users mailing list gmx-users@gromacs.org 
mailto:gmx-users@gromacs.org

 http://lists.gromacs.org/mailman/listinfo/gmx-users
 Please search the archive at 
http://www.gromacs.org/Support/Mailing_Lists/Search before posting!

 Please don't post (un)subscribe requests to the list. Use the
 www interface or send it to gmx-users-requ...@gromacs.org 
mailto:gmx-users-requ...@gromacs.org.

 Can't post? Read http://www.gromacs.org/Support/Mailing_Lists


--
Florian Dommert
Dipl. - Phys.

Institute for Computational Physics
University Stuttgart

Pfaffenwaldring 27
70569 Stuttgart

EMail: domm...@icp.uni-stuttgart.de mailto:domm...@icp.uni-stuttgart.de
Homepage: http://www.icp.uni-stuttgart.de/~icp/Florian_Dommert 
http://www.icp.uni-stuttgart.de/%7Eicp/Florian_Dommert


Tel.: +49 - (0)711 - 68563613
Fax.: +49 - (0)711 - 68563658








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[gmx-users] BD with Hydrodynamic interactions?

2011-09-25 Thread Sanku M
Hi,
  I was wondering whether BD simulation integrator in Gromacs also have option 
of including hydrodynamic interactions.
Sanku-- 
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