<s>
A	O
Virtual	B-General_Concept
Facility	I-General_Concept
(	O
VF	O
)	O
is	O
a	O
highly	O
realistic	O
digital	O
representation	O
of	O
a	O
data	B-Operating_System
center	I-Operating_System
.	O
</s>
<s>
The	O
term	O
virtual	O
in	O
Virtual	B-General_Concept
Facility	I-General_Concept
refers	O
to	O
the	O
use	O
of	O
the	O
word	O
as	O
in	O
Virtual	B-Application
Reality	I-Application
rather	O
than	O
the	O
abstraction	O
of	O
computer	O
resources	O
as	O
in	O
platform	B-General_Concept
virtualization	I-General_Concept
.	O
</s>
<s>
The	O
VF	O
mirrors	O
the	O
characteristics	O
of	O
the	O
physical	O
facility	O
over	O
time	O
and	O
allows	O
modeling	O
all	O
relevant	O
characteristics	O
of	O
a	O
physical	O
data	B-Operating_System
center	I-Operating_System
with	O
a	O
high	O
degree	O
of	O
precision	O
.	O
</s>
<s>
The	O
term	O
Virtual	B-General_Concept
Facility	I-General_Concept
was	O
introduced	O
by	O
Future	O
Facilities	O
,	O
a	O
data	B-Operating_System
centre	I-Operating_System
design	O
consultancy	O
focused	O
on	O
delivering	O
Design	O
and	O
Operational	O
solutions	O
to	O
address	O
the	O
emerging	O
environmental	O
problems	O
facing	O
the	O
modern	O
Mission	O
Critical	O
Facility	O
(	O
MCF	O
)	O
.	O
</s>
<s>
The	O
concept	O
is	O
in	O
essence	O
a	O
convergence	O
of	O
the	O
fields	O
of	O
Virtual	B-Application
Reality	I-Application
(	O
VR	O
)	O
,	O
Computer	B-Application
Simulation	I-Application
and	O
Expert	B-Application
Systems	I-Application
,	O
applied	O
to	O
the	O
specific	O
domain	O
of	O
facilities	O
.	O
</s>
<s>
The	O
VF	O
type	O
of	O
computer	B-Application
simulation	I-Application
allows	O
detailed	O
analysis	O
and	O
prototyping	O
of	O
air	O
flow	O
in	O
the	O
data	B-Operating_System
center	I-Operating_System
by	O
making	O
use	O
of	O
Computational	O
Fluid	O
Dynamics	O
(	O
CFD	O
)	O
techniques	O
.	O
</s>
<s>
This	O
in	O
turn	O
allows	O
the	O
air	O
flow	O
and	O
temperatures	O
of	O
the	O
facility	O
to	O
be	O
analyzed	O
visually	O
(	O
Scientific	B-Application
Visualisation	I-Application
)	O
and	O
numerically	O
to	O
study	O
and	O
predict	O
what	O
will	O
happen	O
in	O
the	O
real	O
facility	O
.	O
</s>
