Re: [gmx-users] Ewald summation in 2 dimensions with correction

2017-11-15 Thread Dan Gil
Hi, I tried using the regular PME method with and without corrections. The results don't depend on the choice of ewald-geometry at all! I used (Gromacs 5.1): wall-ewald-zfac = 3 ewald-geometry = 3d ; This prompts a warning because I am using 2 walls - 2d system. I forced this with maxwarn.

Re: [gmx-users] Ewald summation in 2 dimensions with correction

2017-11-13 Thread Dan Gil
Hi, I am using gmx potential to measure the electric field. I've reported the values from field.xvg in my previous email. The field at the edges of the ionic liquid near the walls will oscillate because of the electric double layer but it is the bulk field I am concerned with. I read the

Re: [gmx-users] Ewald summation in 2 dimensions with correction

2017-11-12 Thread David van der Spoel
On 11/11/17 16:44, Dan Gil wrote: Hi, Just wanted to see if anyone had any thoughts... For more information, if I use: wall-ewald-zfac = 3 E-z= 1 5 0 The electric field from ionic liquid has a magnitude of 7.5 V/nm in the opposite direction to the applied electric field.

Re: [gmx-users] Ewald summation in 2 dimensions with correction

2017-11-11 Thread Dan Gil
Hi, Just wanted to see if anyone had any thoughts... For more information, if I use: wall-ewald-zfac = 3 E-z= 1 5 0 The electric field from ionic liquid has a magnitude of 7.5 V/nm in the opposite direction to the applied electric field. This makes no sense to me at all.

[gmx-users] Ewald summation in 2 dimensions with correction

2017-11-08 Thread Dan Gil
Hello, I am studying room-temperature ionic liquids in slab geometry and I am experiencing that I cannot get rid of the interactions between periodic images in the z-direction. Is there something wrong with what I am doing or is this inevitable? The reason I think this is because when I change