Re: [gmx-users] What is the meaning of negative surface tension?
What are the uncertainties in your pressure values? Sent from my phone On Sep 23, 2016 12:01 PM, "gozde ergin"wrote: > Also when I check the pressure in X,Y and Z axis, > Pzz = -0.34 bar > Pyy = -1275 bar > Pxx = 32 bar. > Pyy and Pxx should be equal to each other. So basically system is not > under equilibrium conditions. > How should I solve this problem? Any idea? > > > On 23 Sep 2016, at 09:27, gozde ergin wrote: > > > > Dear all, > > > > I am simulating organic covered salty water system in order to estimate > the surface tension. Force field is Charmm36 and water model in TIP3P. > > Surface tension is -127 mN/m after 5 ns run. What is the meaning of > negative surface tension? > > I was expecting +30 ~ +40 mN/m but not negative. > > Maybe my system was not under equilibrium conditions. > > Will longer running solve the problem? Any help would be appreciated. > > > > Thanks in advance. > > -- > Gromacs Users mailing list > > * Please search the archive at http://www.gromacs.org/ > Support/Mailing_Lists/GMX-Users_List before posting! > > * Can't post? Read http://www.gromacs.org/Support/Mailing_Lists > > * For (un)subscribe requests visit > https://maillist.sys.kth.se/mailman/listinfo/gromacs.org_gmx-users or > send a mail to gmx-users-requ...@gromacs.org. > -- Gromacs Users mailing list * Please search the archive at http://www.gromacs.org/Support/Mailing_Lists/GMX-Users_List before posting! * Can't post? Read http://www.gromacs.org/Support/Mailing_Lists * For (un)subscribe requests visit https://maillist.sys.kth.se/mailman/listinfo/gromacs.org_gmx-users or send a mail to gmx-users-requ...@gromacs.org.
Re: [gmx-users] What is the meaning of negative surface tension?
Also when I check the pressure in X,Y and Z axis, Pzz = -0.34 bar Pyy = -1275 bar Pxx = 32 bar. Pyy and Pxx should be equal to each other. So basically system is not under equilibrium conditions. How should I solve this problem? Any idea? > On 23 Sep 2016, at 09:27, gozde erginwrote: > > Dear all, > > I am simulating organic covered salty water system in order to estimate the > surface tension. Force field is Charmm36 and water model in TIP3P. > Surface tension is -127 mN/m after 5 ns run. What is the meaning of negative > surface tension? > I was expecting +30 ~ +40 mN/m but not negative. > Maybe my system was not under equilibrium conditions. > Will longer running solve the problem? Any help would be appreciated. > > Thanks in advance. -- Gromacs Users mailing list * Please search the archive at http://www.gromacs.org/Support/Mailing_Lists/GMX-Users_List before posting! * Can't post? Read http://www.gromacs.org/Support/Mailing_Lists * For (un)subscribe requests visit https://maillist.sys.kth.se/mailman/listinfo/gromacs.org_gmx-users or send a mail to gmx-users-requ...@gromacs.org.
[gmx-users] What is the meaning of negative surface tension?
Dear all, I am simulating organic covered salty water system in order to estimate the surface tension. Force field is Charmm36 and water model in TIP3P. Surface tension is -127 mN/m after 5 ns run. What is the meaning of negative surface tension? I was expecting +30 ~ +40 mN/m but not negative. Maybe my system was not under equilibrium conditions. Will longer running solve the problem? Any help would be appreciated. Thanks in advance. -- Gromacs Users mailing list * Please search the archive at http://www.gromacs.org/Support/Mailing_Lists/GMX-Users_List before posting! * Can't post? Read http://www.gromacs.org/Support/Mailing_Lists * For (un)subscribe requests visit https://maillist.sys.kth.se/mailman/listinfo/gromacs.org_gmx-users or send a mail to gmx-users-requ...@gromacs.org.