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Re: [lammps-users] Creating Surface roughness
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Re: [lammps-users] Creating Surface roughness


From: Andrew Jewett <jewett@...1937...>
Date: Tue, 7 Nov 2017 15:12:38 -0800

A "rough" surface could mean many different things.  You will have to clarify what kind of rough surface you want.

In nature, rough surfaces are created by a physical process(eg, deposition, aggregation, erosion...).   If you want to create a realistically rough surface, then you may need to learn more about this process and simulate it.  In that case, starting with a smooth spherical structure is probably good enough.

Generally speaking, when trying to create a system with a complicated geometry, most people do not rely on LAMMPS input script commands.  Instead, they create a "DATA" file.  The basic format of this file is explained here:
http://lammps.sandia.gov/doc/2001/data_format.html
... and there are some tools to help you create these files here:
http://lammps.sandia.gov/prepost.html

Cheers
andrew





On Tue, Nov 7, 2017 at 10:16 AM, Gopal <pnag.iisc@...24...> wrote:
Dear All,

I am trying to create spherical particle (few tens of nanometers in size) with certain amount roughness . 

Can someone help me know whether its possible to incorporate roughness on a spherical particle using lammps commands?

 Otherwise, can anyone suggest other ways to do it in lammps. Thank you.

Regards,
Gopal Das
Indian Institute of Science, Bangalore 

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