<s>
VSim	O
comes	O
with	O
VSimComposer	O
,	O
a	O
full-featured	O
graphical	B-Application
user	I-Application
interface	I-Application
for	O
visual	O
setup	O
of	O
any	O
simulation	O
,	O
including	O
CAD	O
geometry	O
import	O
and/or	O
direct	O
geometry	O
construction	O
.	O
</s>
<s>
VSim	O
computes	O
using	O
the	O
powerful	O
Vorpal	B-Application
computational	O
engine	O
,	O
which	O
has	O
been	O
used	O
to	O
simulate	O
the	O
dynamics	O
of	O
electromagnetic	O
systems	O
,	O
plasmas	O
,	O
and	O
rarefied	O
as	O
well	O
as	O
dense	O
gases	O
.	O
</s>
<s>
The	O
Vorpal	B-Application
computational	O
engine	O
is	O
arbitrary	O
dimensional	O
,	O
meaning	O
that	O
it	O
can	O
be	O
run	O
in	O
one	O
,	O
two	O
,	O
or	O
three	O
dimensions	O
.	O
</s>
<s>
It	O
can	O
be	O
run	O
in	O
full	O
electromagnetic	O
mode	O
,	O
using	O
the	O
FDTD	B-Algorithm
algorithm	O
,	O
or	O
with	O
electrostatically	O
or	O
magnetostatically	O
computed	O
fields	O
.	O
</s>
<s>
Charged	O
and	O
neutral	O
particles	O
in	O
Vorpal	B-Application
can	O
be	O
represented	O
by	O
a	O
fluid	O
or	O
kinetically	O
using	O
the	O
PIC	B-Algorithm
algorithm	O
in	O
either	O
case	O
self-consistently	O
.	O
</s>
<s>
The	O
computational	O
domain	O
can	O
be	O
periodic	O
or	O
mimic	O
boundaries	O
at	O
infinity	O
via	O
PML	B-Algorithm
or	O
other	O
outgoing	O
wave	O
boundary	O
conditions	O
.	O
</s>
<s>
Vorpal	B-Application
outputs	O
data	O
in	O
HDF5	B-Application
(	O
Hierarchical	B-Application
Data	I-Application
Format	I-Application
)	O
that	O
is	O
VizSchema	O
compliant	O
.	O
</s>
<s>
VSimComposer	O
then	O
writes	O
out	O
an	O
input	O
file	O
suitable	O
for	O
use	O
by	O
the	O
Vorpal	B-Application
computational	O
engine	O
.	O
</s>
<s>
VSim	O
can	O
be	O
run	O
from	O
its	O
VSimComposer	O
GUI	B-Application
interface	O
or	O
invoked	O
from	O
the	O
command	O
line	O
.	O
</s>
<s>
The	O
parallel	O
version	O
of	O
VSim	O
runs	O
on	O
systems	O
that	O
support	O
the	O
Message	B-Application
Passing	I-Application
Interface	I-Application
(	O
MPI	B-Application
)	O
.	O
</s>
<s>
Input	O
to	O
VSim	O
is	O
made	O
via	O
XML-like	O
files	O
used	O
to	O
create	O
simulation	O
objects	O
.	O
</s>
<s>
Vorpal	B-Application
output	O
files	O
can	O
be	O
visualized	O
within	O
VSimComposer	O
.	O
</s>
<s>
As	O
of	O
this	O
writing	O
,	O
VSim	O
and	O
its	O
Vorpal	B-Application
computational	O
engine	O
have	O
been	O
cited	O
more	O
than	O
700	O
times	O
,	O
with	O
an	O
average	O
of	O
50	O
citations	O
per	O
year	O
,	O
making	O
it	O
the	O
most	O
highly	O
cited	O
computational	O
plasma	O
application	O
with	O
its	O
capabilities	O
.	O
</s>
