Hi cp2k groups,<br><div>I'm a new cp2k user and recently i simulated the contact Angle of water on graphene using AIMD. I found that different values of EPS_SCF lead to different changes in cons qty, thus leading to different increases in used time. As shown in the following three figures, when cons qty is almost unchanged, the time taken by each MD step is the same, but when cons qty rises, usedtime rises sharply, may I ask what is the problem? How can I improve it? The following is my input file.<br></div><div>EPS_SCF = 1.0*10^-5, cutoff = 320 Ry</div><div><img alt="1E-5.png" data-iml="5894228.5" width="534px" height="409px" src="cid:c1dc5f85-daed-4d85-bb1b-5a5a35a0889c"><br></div><div>5.0*10^-6, cutoff = 380Ry</div><div><img alt="5E-6.png" data-iml="5983627.899999976" width="534px" height="409px" src="cid:5e0a5228-4dc3-4e99-9992-96c1187d53b5"></div><div>2*10-6, cutoff = 380 Ry</div><div><img alt="2E-6.png" data-iml="6243873.199999988" width="534px" height="409px" src="cid:fdef11ee-938b-4aa9-ac27-463b507cc50e"><br></div><div>I used NVT 330 K and nose-hoover chain, and here is my input file.<br></div><div>My questions are: 1. Does cons Qty remain constant over time once NVT reaches equilibrium? 2. Why does the cons Qty in 2*10-6 fluctuate wildly after it has remained unchanged for a long time? 3. How to accelerate AIMD. <br></div><div><br></div><div>Best regards, </div><div>X.J Xu</div><div><br></div><div><br></div><div><br></div>
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