[gmx-users] RE: how long simulation takes to get stable when constrains is none in mdp file?

[Vitaly Chaban]

>why RMSD?
>
>On Tue, Aug 5, 2008 at 9:19 AM, David van der Spoel
<spoel at xray.bmc.uu.se> wrote:
> wang kelvin wrote:
>>
>> hi:
>>  i am doing simulation of  a system consists of  512 DMSO moleculers and
>> 917 water moleculers.
>> the whole system is running under 290K and 1bar ,and constraints = none;
>> the simulation has taken 8000 ps ,but it seems not to get stable
>> yet,because RMSD keeps rising.
>> when i did simulation of the same system with constraints set all-bonds,it
>> usually get stable within 3000ps.
>> i wonder whether any mistakes has been made or it is normal.
>> can you give some hints?
>> thanks.
>
> what rmsd?

why it shouldn't rise? :)))

-- 
Vitaly V. Chaban
School of Chemistry
National University of Kharkiv
Svoboda sq., 4, Kharkiv 61077, Ukraine
email: chaban at univer.kharkov.ua
skype: vvchaban