From 194b45b7295bb9ad17c29dae482cdc51f1c575f9 Mon Sep 17 00:00:00 2001
From: Dhairya <dhairya.iitb@gmail.com>
Date: Wed, 7 Feb 2024 09:52:02 -0600
Subject: [PATCH] Example file

---
 examples/granular/en_example/particles.dat | 18 ++++++++++++++++
 examples/granular/en_example/start.lammps  | 25 ++++++++++++++++++++++
 2 files changed, 43 insertions(+)
 create mode 100644 examples/granular/en_example/particles.dat
 create mode 100644 examples/granular/en_example/start.lammps

diff --git a/examples/granular/en_example/particles.dat b/examples/granular/en_example/particles.dat
new file mode 100644
index 0000000000..c9f3bd7a9c
--- /dev/null
+++ b/examples/granular/en_example/particles.dat
@@ -0,0 +1,18 @@
+Python generated LAMMPS data file
+
+2 atoms
+1 atom types
+
+0 0.08 xlo xhi
+0 0.04 ylo yhi
+0 0.08 zlo zhi
+
+Atoms # sphere
+
+1 1 0.004 2500 0.04 0.02 0.04 0 0 0
+2 1 0.004 2500 0.04 0.02 0.04416 0 0 0
+
+Velocities
+
+1 0.0  0.0 1 0 0 0
+2 0.0  0.0 -1 0 0 0
diff --git a/examples/granular/en_example/start.lammps b/examples/granular/en_example/start.lammps
new file mode 100644
index 0000000000..2bf0f54ddc
--- /dev/null
+++ b/examples/granular/en_example/start.lammps
@@ -0,0 +1,25 @@
+units	        si	
+atom_style	    sphere
+
+boundary    	p p f
+region		    box block 0 80e-3 0 40e-3 0 80e-3 open 3 open 4
+create_box	    2 box
+
+read_data	    particles.dat add append
+group 		    mb type 1
+
+pair_style granular
+pair_coeff * * hertz/material 1e6 0.8 0.4 tangential mindlin  NULL 0.0 0.5 damping enhertz
+# pair_coeff * * hertz 1e6 0.3 tangential mindlin  1e4 1.0 0.5 damping enhertz
+# pair_coeff * * hooke 1e6 0.5 tangential mindlin  1 1.0 0.0 damping enhooke
+comm_modify     vel yes
+
+timestep 	    1e-9
+fix		        1 all nve/sphere
+compute		    s all stress/atom NULL pair
+
+dump		    1 all custom 2000000 op.dump id x y z vx vy vz
+dump_modify     1 pad 8
+thermo_style	custom step ke
+run_style 	    verlet
+run		        10000000