<div dir="ltr">Dear <span style="font-size:12.8px">Munmun,<br><br>conserved quantity in the NVT simulation is not V+T. It is defined by the equations of motion, in your case, the Nose-Hoover ones. For these kind of questions please refer to "Understanding molecular simulations" of Frenkel and Smit or any alternative book.<br><br>Yours,<br><br>Vladimir<br></span><br>понедельник, 9 октября 2017 г., 11:28:04 UTC+2 пользователь Munmun Khatua написал:<blockquote class="gmail_quote" style="margin: 0;margin-left: 0.8ex;border-left: 1px #ccc solid;padding-left: 1ex;"><div dir="ltr"><span style="font-size:12.8px">Hi </span><div style="font-size:12.8px"><span style="font-size:12.8px">I am trying to do a NVT simulation in cp2k with one H2O molecule at 300K with Nose thermostat. What is the Constant Quantity that is printed in the </span><span style="font-size:12.8px">H2O-2-1.ener file. Is it the total energy (kinetic + potential energy), if this is the case how come it is almost constant in a NVT simulation. </span><span style="font-size:12.8px">I have attached the input file with this mail. </span><span style="font-size:12.8px"> </span><span style="font-size:12.8px">I have taken the input file as it is from </span><span style="font-size:12.8px">cp2k/tests/QS directory of the cp2k source.</span></div><div style="font-size:12.8px"><span style="font-size:12.8px"><br></span></div><div style="font-size:12.8px"><span style="font-size:12.8px">I would be grateful if you suggest how I can solve this problem.</span></div><div style="font-size:12.8px"><span style="font-size:12.8px"><br></span></div><div style="font-size:12.8px"><span style="font-size:12.8px">Munmun</span></div></div><div><br><div class="gmail_quote">On Thu, Oct 5, 2017 at 12:20 PM, Munmun Khatua <span dir="ltr"><<a href="javascript:" target="_blank" gdf-obfuscated-mailto="ifVEQbW2AgAJ" rel="nofollow" onmousedown="this.href='javascript:';return true;" onclick="this.href='javascript:';return true;">mun...@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><span style="font-size:12.8px">Hi</span><div style="font-size:12.8px"><div style="font-size:12.8px">I am trying to do a NVT simulation in cp2k with one H2O molecule at 300K with Nose thermostat. The problem that I am facing while doing this simulation is that temperature is not kept constant throughout the simulation (printed in the H2O-2-1.ener file). I have taken the input file as it is from <span style="font-size:12.8px">cp2k/tests/QS directory of the cp2k source.</span></div><div style="font-size:12.8px"><span style="font-size:12.8px"><br></span></div><div style="font-size:12.8px"><span style="font-size:12.8px">I would be grateful if you suggest how I can solve this problem</span></div></div><span><font color="#888888"><div><br></div>-- <br><div><div dir="ltr"><div dir="ltr"><div dir="ltr"><div>Munmun Khatua<br></div><div><br></div></div></div></div></div>
</font></span></div>
</blockquote></div><br><br clear="all"><div><br></div>-- <br><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div>Munmun Khatua<br></div><div>IIT-Bombay</div><div>India</div></div></div></div></div></div></div>
</div>
</blockquote></div>