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Costal Inlets Research Program
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Introduction and Objectives cont'd - TR-02-240009
Hydrodynamic Model Description
TR-02-24
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2
Governing Equations and
2-D Modeling
This
chapter
briefly
describes
the
ADCIRC
hydrodynamic
computer
model
as
well
as
model
parameter
values and the
boundary
and
interior
domain
forcing
functions
utilized
to
attain
the
results
used
to
build
the
tidal
database.
Hydrodynamic
Model
Description
The
hydrodynamic
numerical
model
used
in the
Eastcoast
2001
tidal
data-
base
computations
is
ADCIRC-2DDI,
the
depth-integrated
option
of the
2-D
and
3-D
fully
nonlinear
hydrodynamic
code
ADCIRC
(Luettic,
Westerink,
and
Scheffner
1992
1
;
Westerink,
Luettich,
and
Kolar
1996).
ADCIRC-2DDI
uses
the
depth-integrated
equations of
mass
and momentum subject to the incompressi-
bility,
Boussinesq,
and
hydrostatic
pressure
approximations.
Baroclinic
processes
were neglected,
including
any
expansion
and
contraction
due to
radiational
heating
.
The
governing
continuity
and
momentum equations
are
written
in
primitive
form
as:
1 ∂
UH
∂
(
VH
cos
φ
)
∂
ξ
+
+
=0
(1)
∂
t R
cos
φ
∂
λ
∂
φ
∂
U V
∂
U
tan
φ
∂
U
1
+
+
-
U
+
f
V
=
U
∂
t R
cos
φ
∂
λ
R ∂
φ
R
(2)
∂
p
s
τ
1
+
g
(
ξ
-
αη
)
+
s
λ
-
τ
*
U
-
R
cos
φ
∂
λ
ρ
0
ρ
0
H
1
Additional
information
available on
the
World
Wide
Web
at
http://www.marine.unc.edu/C_CATS/adcirc/adcirc.htm).
4
Chapter
2
Governing
Equations
and
2-D
Modeling
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