Questions tagged [radial-distribution-function]

Questions about radial distributions functions: g(r).

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21 votes
3 answers
887 views

Generating special quasirandom structures (SQS) for surface calculations?

Given that most of the available codes for performing DFT calculations work with periodic boundary conditions, there are tools like mcsqs as a part of the Alloy ...
Mythreyi's user avatar
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13 votes
1 answer
711 views

How to calculate RDFs for MD trajectories without PBC, directly from coordinates? [closed]

I have been running MD simulations on water droplets with an ion in them. I am trying to implement a program that could calculate the radial distribution function from ion to oxygen (or ion to ...
S R Maiti's user avatar
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12 votes
1 answer
774 views

Normalization condition in evaluating the radial distribution function for a hard-spheres system

I am trying to simulate a 3D hard-spheres in a box system in Python. The idea behind this is that I have to create a system in a 1x1x1 box with periodic boundary conditions and with $N = 500$ ...
megamence's user avatar
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12 votes
1 answer
2k views

Compute RDF between COMs of two selections (or groups) using GROMACS

I have been using gromacs since years but I am always confused when I want to perform the following task: compute the RDF (radial distribution function) between the ...
gluuke's user avatar
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11 votes
1 answer
2k views

How should I generate a radial distribution function (RDF) for an MD trajectory with python?

I am attempting to analyse the radial distribution function (oxygen to oxygen) for a ~400ps simulation on a droplet of water (MD done with NAMD). I am using the python library MDAnalysis to do this. ...
S R Maiti's user avatar
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7 votes
0 answers
108 views

Deriving relations for a hard sphere phase diagram [closed]

In Torquato's book "Random Heterogeneous Materials", he has written: $$\frac{p}{\rho kT} = 1+2^{d-1}\eta g_2 (D^{+})\tag{1}$$ where $g_2(D^+)$ is the contact value from the right-side of the ...
megamence's user avatar
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