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<p class="MsoNormal" style="line-height:150%"><span lang="EN-US" style="font-family:
"Times New Roman",serif;mso-fareast-font-family:宋体">Dear cp2k group,<o:p></o:p></span></p>
<p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0;
line-height:150%"><span lang="EN-US" style="font-family:"Times New Roman",serif;
mso-fareast-font-family:宋体">I am a beginner of cp2k, if there was any
inaccurate description, please don't mind. <o:p></o:p></span></p>
<p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0;
line-height:150%"><span lang="EN-US" style="font-family:"Times New Roman",serif;
mso-fareast-font-family:宋体">Recently I want to explore the effect of flow
velocity on the corrosion rate. As shown in the figure below, I want to give
the atoms which is in the red box a constant downward velocity, after it
collides with the golden atoms below, it bounces back to the reflecting wall
without changing the magnitude of its velocity only changing its direction, and then
continuing to collide with the golden atoms below to simulate the process of liquid
flow. I only know the keyword "reflective wall", although I checked the manual, I still don't know how
it should be described and furthermore how to give a constant velocity and
direction to the atoms in the red box. The following two files are the file </span><span style="font-family: 'Times New Roman', serif;">used to describe my problem </span><span style="font-family: 'Times New Roman', serif; line-height: 150%; text-indent: 21pt;">and the original input file. </span><span style="font-family: 'Times New Roman', serif; line-height: 150%; text-indent: 21pt;">Can you give me some suggestions? I would really appreciate it if someone could help me. Thank
you very much!!</span></p>
<p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0;
line-height:150%"><span lang="EN-US" style="font-family:"Times New Roman",serif;
mso-fareast-font-family:宋体">Sincerely,<o:p></o:p></span></p>
<p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0;
line-height:150%"><span lang="EN-US" style="font-family:"Times New Roman",serif;
mso-fareast-font-family:宋体">Mia Amelia<o:p></o:p></span></p><p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0;
line-height:150%"><span lang="EN-US" style="font-family:"Times New Roman",serif;
mso-fareast-font-family:宋体"><br></span></p><span>
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