Re: [gmx-users] Tcoupl default setting

2011-04-21 Thread Mark Abraham

On 4/22/2011 1:51 AM, Charlie Forde wrote:

Dear All,

I had intended to perform an NPT simulation, however although I 
selected a barostat I omitted to select a thermostat, nevertheless I 
did set tc_grps= system, tau_t = 0.1 and ref_t= 300. My temperature 
appears to fluctuate around the desired 300 K. My question is, by 
setting tau_t and  ref_t has a default thermostat also been turned on 
by default 


No.

and if so which one, or have I not performed an NPT but rather an NPE 
simulation with my apparent well behaved temperature just being 
coincidental. Needless to say there is no mention of tcoupl in the 
output file.


Generate a short run that does use temperature coupling and compare the 
.log files with diff. Or, just read through the first few hundred lines 
of your .log file to see what it (doesn't) report about T-coupling.


Mark



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[gmx-users] Tcoupl default setting

2011-04-21 Thread Charlie Forde

Dear All,

I had intended to perform an NPT simulation, however although I selected a 
barostat I omitted to select a thermostat, nevertheless I did set tc_grps= 
system, tau_t = 0.1 and ref_t= 300. My temperature appears to fluctuate around 
the desired 300 K. My question is, by setting tau_t and  ref_t has a default 
thermostat also been turned on by default and if so which one, or have I not 
performed an NPT but rather an NPE simulation with my apparent well behaved 
temperature just being coincidental. Needless to say there is no mention of 
tcoupl in the output file.

Regards

Charlie.
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