Re: [gmx-users] Velocities from the .gro file

2020-04-16 Thread Eric Smoll
Sent from my iPhone > On Apr 16, 2020, at 7:53 PM, Mohamed Abdelaal wrote: > > I have one more question please regarding the velocity. No problem. > > What is the mean value for the velocity being generated by GROMACS ? Is it > zero ? Yes. > > I have also understood fr om the below

Re: [gmx-users] Velocities from the .gro file

2020-04-16 Thread Mohamed Abdelaal
I have one more question please regarding the velocity. What is the mean value for the velocity being generated by GROMACS ? Is it zero ? I have also understood fr om the below paragraph which is written in the manual section 3.4.1, that the values generated are selected from the range between 0

Re: [gmx-users] Velocities from the .gro file

2020-04-14 Thread Eric Smoll
My knowledge is a bit old. Tpr files are binary so you cannot read them without a special tool. In gromacs 2018, there was a tool that would spit out the contents of a tpr file in a readable format. Execute “gmx dump -h” to learn more. Justin is correct. There is no tool or file that will

Re: [gmx-users] Velocities from the .gro file

2020-04-14 Thread Mohamed Abdelaal
Many thanks Dr. Erik for your reply :) On Tue, Apr 14, 2020 at 11:15 PM Eric Smoll wrote: > No problem. > > Now it is clear what you are trying to do. The previous description of > your goals did not make much physical sense. The initial velocities are > such that all three dimensions are

Re: [gmx-users] Velocities from the .gro file

2020-04-14 Thread Mohamed Abdelaal
Many thanks for your quick reply :) On Tue, Apr 14, 2020 at 11:09 PM Justin Lemkul wrote: > > > On 4/14/20 4:55 PM, Mohamed Abdelaal wrote: > > Sorry for writing again in the same topic but I couldn't solve > > the velocity problem. > > > > I am trying to reproduce a paper written by: Claire

Re: [gmx-users] Velocities from the .gro file

2020-04-14 Thread Justin Lemkul
On 4/14/20 4:55 PM, Mohamed Abdelaal wrote: Sorry for writing again in the same topic but I couldn't solve the velocity problem. I am trying to reproduce a paper written by: Claire Tonnel + , Martin Stroet + , Bertrand Caron, Andrew J. Clulow, Ravi C. R. Nagiri, Alpeshkumar K. Malde, Paul L.

Re: [gmx-users] Velocities from the .gro file

2020-04-14 Thread Mohamed Abdelaal
Sorry for writing again in the same topic but I couldn't solve the velocity problem. I am trying to reproduce a paper written by: Claire Tonnel + , Martin Stroet + , Bertrand Caron, Andrew J. Clulow, Ravi C. R. Nagiri, Alpeshkumar K. Malde, Paul L. Burn,* Ian R. Gentle, Alan E. Mark,* and

Re: [gmx-users] Velocities from the .gro file

2020-04-08 Thread Mohamed Abdelaal
Many thanks for your reply :) All your language assumptions are true and that is exactly what I wanted to communicate, next time I will try to be more precise and sorry for the confusion  I will read section 3.4.1 again carefully. Thanks again and sorry for the inconvenience. Mohamed On Thu,

Re: [gmx-users] Velocities from the .gro file

2020-04-08 Thread Eric Smoll
On Wed, Apr 8, 2020 at 4:41 PM Mohamed Abdelaal wrote: > Many thanks for your reply  > > The limitation in the generate velocity using the .mdp file, is that while > I can generate the velocity from Maxwell distribution, I will have the > same velocities in the x, y and z directions. > I

Re: [gmx-users] Velocities from the .gro file

2020-04-08 Thread Mohamed Abdelaal
Many thanks for your reply  The limitation in the generate velocity using the .mdp file, is that while I can generate the velocity from Maxwell distribution, I will have the same velocities in the x, y and z directions. On the other hand, generating the velocity from the .gro file will let me

Re: [gmx-users] Velocities from the .gro file

2020-04-07 Thread Eric Smoll
On Tue, Apr 7, 2020 at 3:38 PM Mohamed Abdelaal wrote: > No, I use the generate velocity option in the .mdp files. > > However I want now to assign different velocities in the x,y,z directions. > Which I thought it could only be done through the .gro file, but I don't > know If I did that,

Re: [gmx-users] Velocities from the .gro file

2020-04-07 Thread Mohamed Abdelaal
No, I use the generate velocity option in the .mdp files. However I want now to assign different velocities in the x,y,z directions. Which I thought it could only be done through the .gro file, but I don't know If I did that, should I change the value of the generate velocity to be = NO in the

Re: [gmx-users] Velocities from the .gro file

2020-04-06 Thread Justin Lemkul
On 4/6/20 12:16 PM, Mohamed Abdelaal wrote: Hello everybody :) Can I use the gmx insert-molecules to insert molecules in my box with velocities by adding the velocities in the .gro file and insert the molecules from this .gro file ? Have you tried it? -Justin --