Apr 23rd
Dear to whom it may concern,
I am a student in a Chinese college. I want to use Lammps to simulate the process of electronic corrosion. I need a heat source the radius of which could increase gradually as time going. Like the picture shows below . Which command should I use or quote and what is the suitable form of that programming commands?
If possible more information is glad to hear from you and that would be more appreciated.
Yours,
Nafens
Apr 23rdDear to whom it may concern,
I am a student in a Chinese college. I want to use Lammps to simulate the
process of electronic corrosion. I need a heat source the radius of which
could increase gradually as time going. Like the picture shows below . Which
command should I use or quote and what is the suitable form of that
programming commands?
it is not a simple as that. first you have to decide which model
(potential) you are going to use and what size objects you want
to model. the sketch you quote hints are (by atomic simulation
standards) *very* large systems. have you made some tests
simulating the system without the heat source and whether
those simulations are possible with the resources that you
have available to you?
to get such a specific model going, you are highly likely to
do some c++ programming and adding customizations to
the LAMMPS code. i don't think that there is any facilty
that does what you want to do.
also, can you please explain what the physical justification
for this model is? objects simply don't grow out of nothing.
where is the growth coming from? what does it represent?
cheers,
axel.
If your picture means that you simply want
to heat a geometric region where the region
changes over time, you could do the following.
Use compute temp/region as the temperature
you assign to a thermostat (via fix modify temp)
like the fix langevin command. When you define
the region with the region command use the move
option to move the sphere into the substrate
over time. If what you want is a radius that grows
with time, that could be added as an option
similar to move.
This should have the effect that you can
add heat to a region that changes with time.
Steve