Hi,<div><br /></div><div>I am trying to run an AIMD simulation of an explicitly solvated system of ~280 atoms at 300 K and 1 bar pressure. However, I have noticed my simulation is very slow (Only reached about 200 fs in a day). I do have a few motion constraints on my solute molecules, which I believe could also make the simulations slower. <br />Each MD step takes about 200 seconds to run with 6-10 SCF iterations. I am new to CP2K and AIMD in general, so I am not sure if this speed is normal. Could anyone please help me figure out if I am missing something or if there are any ways to make these simulations faster? Your help will be very much appreciated.<br /><br />Here are the parameters I am using:<br />1) CP2K/2024.2 version (mpirun -np 32 -c 4 cp2k.psmp)<br />2) Anthracene and 2-bromophenol in a DMF box (17*14*14)<br />2) Calculation started from the last snapshot of a 5 ns classical MD run.<br />2) PBE-D3(BJ)/DZVP-MOLOPT/GTH <br />3) ASPC(3) extrapolation<br />4) DIIS as the OT minimizer with FULL_SINGLE_INVERSE preconditioner</div><div>5) Timestep: 0.5 fs<br />5) CSVR thermostat with 50 fs time constant.<br /><br />I have also attached the full input file and a plot of the constant-of-motion wrt time for your reference.<br /><br />Please let me know if you need more information from me. I would really appreciate any feedback you can provide.<br /><br />Thank you,</div><div>Akanksha</div>
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