Re: [gmx-users] free energy: annihilation

2006-08-29 Thread David Mobley
David, It still seems strange, if one can get a lot of other properties correct, like DHvap, dielectric constant, density, diffusion constant etc. Unfortunately my simulations are converging very slowly, but I hope to have more conclusive results soon. Ah, you checked all those things? I suspe

Re: [gmx-users] free energy: annihilation

2006-08-29 Thread David van der Spoel
David Mobley wrote: David, > Yuguang reminds me of something else... I just did a bunch of > hydration free energy calculations for a large set of small molecules. > These tend to be pretty accurate for stuff that is mostly nonpolar, > but the larger the charges are, the bigger the deviation fr

Re: [gmx-users] free energy: annihilation

2006-08-29 Thread David Mobley
David, > Yuguang reminds me of something else... I just did a bunch of > hydration free energy calculations for a large set of small molecules. > These tend to be pretty accurate for stuff that is mostly nonpolar, > but the larger the charges are, the bigger the deviation from > experiment can b

Re: [gmx-users] free energy: annihilation

2006-08-27 Thread David van der Spoel
David Mobley wrote: Yuguang reminds me of something else... I just did a bunch of hydration free energy calculations for a large set of small molecules. These tend to be pretty accurate for stuff that is mostly nonpolar, but the larger the charges are, the bigger the deviation from experiment can

Re: [gmx-users] free energy: annihilation

2006-08-26 Thread David Mobley
ECTED] On Behalf Of David Mobley Sent: Saturday, August 26, 2006 9:05 PM To: Discussion list for GROMACS users Subject: Re: [gmx-users] free energy: annihilation David, > I'm trying to annihilate a complete DMSO box at constant volume. The > dG/dlam values converge nicely but when I

RE: [gmx-users] free energy: annihilation

2006-08-26 Thread Mu Yuguang (Dr)
PROTECTED] On Behalf Of David Mobley Sent: Saturday, August 26, 2006 9:05 PM To: Discussion list for GROMACS users Subject: Re: [gmx-users] free energy: annihilation David, > I'm trying to annihilate a complete DMSO box at constant volume. The > dG/dlam values converge nicely but when

Re: [gmx-users] free energy: annihilation

2006-08-26 Thread David Mobley
David, I'm trying to annihilate a complete DMSO box at constant volume. The dG/dlam values converge nicely but when I integrate the curve I get a Helmholtz energy that is almost exactly a factor of two different from the experimental value. Maybe this is too basic, but are you doing the transf