Re: [gmx-users] Type of function for bond or bend in SPC/E or TIP3P model

2014-02-18 Thread Mark Abraham
Wikipedia seems to have these... http://en.wikipedia.org/wiki/Water_model. The authors of a technique using a version of SPC/E will have to have referred to the parameterization of that model, whether flexible or not. Mark On Tue, Feb 18, 2014 at 2:38 PM, leila salimi wrote: > Thanks Mark. >

Re: [gmx-users] Type of function for bond or bend in SPC/E or TIP3P model

2014-02-18 Thread leila salimi
Thanks Mark. Could you send me the reference that SPC/E is a rigid model? I heard that SPC/E is a flexible model and I am doing simulation with gromacs and CP2K with this model without constraint. Regards, Leila On Mon, Feb 17, 2014 at 2:36 PM, Mark Abraham wrote: > Hi, > > Those water models a

Re: [gmx-users] Type of function for bond or bend in SPC/E or TIP3P model

2014-02-17 Thread Mark Abraham
Hi, Those water models are rigid, so the question doesn't really apply. But you can see in their .itp files what they would use if they were flexible, which tends to be the kind of thing you suggested. The bonded function type numbers can be looked up in tables in manual section 5.7, which cross-r

[gmx-users] Type of function for bond or bend in SPC/E or TIP3P model

2014-02-17 Thread leila
Dear All, I would like to be sure about the formula for Bond and Angle in itp files, like for SPC/E or TIP3P? Is it like a harmonic form 1/2*K*(R-R0)^2 or K*(R-R0)^2 ? Thanks very much and regards, -- View this message in context: http://gromacs.5086.x6.nabble.com/Type-of-function-for-bond-or

[gmx-users] Type of function for bond or bend in SPC/E or TIP3P model

2014-02-17 Thread leila salimi
Dear All, I would like to be sure about the formula for Bond and Angle in itp files, like for SPC/E or TIP3P? Is it like a harmonic form 1/2*K*(R-R0)^2 or K*(R-R0)^2 ? Thanks very much and regards, Leila -- Gromacs Users mailing list * Please search the archive at http://www.gromacs.org/Suppo