Dear all,

I am going to compute sound velocity © in a simple argon solid. In the literature I found that c^2=dp/d(rho), but I don’t have any idea how to setup a MD simulation to obtain it.

Any suggestion would be appreciated.

Mohyeddin

Dear all,

I am going to compute sound velocity © in a simple argon solid. In the literature I found that c^2=dp/d(rho), but I don’t have any idea how to setup a MD simulation to obtain it.

Any suggestion would be appreciated.

Mohyeddin

Dear all,

I am going to compute sound velocity (c) in a simple argon solid. In the

literature I found that c^2=dp/d(rho), but I don't have any idea how to

setup a MD simulation to obtain it.

i think you need to expand your literature search a little bit.

already wikipedia has more detail to offer.

http://en.wikipedia.org/wiki/Speed_of_sound

axel.

There are lots of ways to estimate the sound speed, with subtle

distinctions between them. The cleanest way is to measure the elastic

constants at zero temperature. See script provided in

examples/ELASTIC. Other ways that are more complicated, but allow you

to distinguish adiabatic and isothermal sound speeds and other

effects:

1. Create a disturbance and watch it propagate

2. Measure stress versus strain