Dear everyone,
Can LAMMPS simulate the situation of ‘High energy laser(High temperature rise rate,lead the water and copper to vaporization even ionization) ablate copper under water’?
How can I load energy,or in what comand?
Finally,how can I extract needed quantity(such as volume)in the dump file except the thermo_style comand? Perhaps,the manual said it,but I haven’t found it.
Thank you for your time.I look forward to your reply.
Sincerely,
Zhiqiang Liao
There are various ways to “heat” a substrate in LAMMPS.
For example, you could use the “fix heat” command. If the
material becomes hot enough, the substrate atoms will
evaporate. There is also a fix evaporate command which
will remove atoms. You can output the volume of
the system (a scalar quantity) with thermo output. See
the thermo_style custom command.
Steve
Dear Steve
I’m really sorry for my terrible explanation about the problems.I think there is something different between our understand.I don’t want to “heat” the material directly, but add “energy”(the unit for it is"mJ" or “mJ/mm²”) that lead material to a high temperature,.Then, I receive the thermodynamic parameters.
The second problem can explain like this.I got a log.file by the “thermo” command ,how can I extract one or two of my needed quantities to Origin or Excel? The method that you suggested I knew it, but it’s not my target.
Thank you for helping me.And best wishes to you.
Sincerely,
Zhiqiang Liao
Comments below.
Steve
Dear Steve
I’m really sorry for my terrible explanation about the problems.I think there is something different between our understand.I don’t want to “heat” the material directly, but add “energy”(the unit for it is"mJ" or “mJ/mm²”) that lead material to a high temperature,.Then, I receive the thermodynamic parameters.
I think heating the material and adding energy are the same thing.
The second problem can explain like this.I got a log.file by the “thermo” command ,how can I extract one or two of my needed quantities to Origin or Excel? The method that you suggested I knew it, but it’s not my target.
Thank you for helping me.And best wishes to you.
The tools/python/log2txt.py script will pull columns of
data out of a log file.
Dear Steve,
Thanks for solving my questions.Can I add high velocity to a cluster of atoms that cause average kinetic energy of the cluster increasing instead of adding energy?Then,the teperature of the system increase.
Zhiqiang Liao
See the fix heat and fix move and velocity commands.
Velocity is kinetic energy - there is no difference in classical MD.
Steve