Code Manual for CONTAIN 2.0 - Federation of American Scientists

ishape
nslab
ibc
tint
Chrl
vufac
bctr
heit
x
structure shape (SLAB, CYLINDER, or SPHERE).
number of nodes in structure.
number of the cell adj scent to outer face of structure.
initial temperature of structure. (K)
characteristic length of structure for condensation model. (m)
a value which depends on the emissivities of the structure surfaces and the
uppermost lower cell layer, and on their geometric relationships. (Must be
s 1; see Equation (10-63))
outer face boundary temperature. (K)
if the structure is a SLAB, “heit” is the surface area (m); if the structure is a
CYLINDER, “heit” is the height; if the structure is a SPHERE, “heit” is
ignored and must be omitted. (m)
node interface positions relative to the inner face of a SLAB or to the center
of curvature of a CYLINDER or a SPHERE. (Specify “nslab” + 1 values,
starting at inner face.) (m)
names material name for each node (specify “nslab” names).
This block provides the characteristics of the structures modeled in the cell. Three structural shapes
are allowed: slabs, cylinders, and spheres. Cylinders and spheres are actually half-cylinders and
hemispheres whose inner surfaces act as roofs, walls, or floors for aerosol deposition. Thus, to
model a whole cylinder or a complete sphere, two structures are required. When “ibc” is a valid cell
number (1 < “ibc” s “ncells”), “bctr” must not be present. When “ibc” is not a valid cell number,
“bctr” is used as the temperature seen by the outer boundary if “bctr” is zero, an adiabatic (insulated)
outer boundary is assumed. An invalid cell number is one that is greater than the maximum number
of cells specified for the problem, i.e., it corresponds to a “fictitious” cell. Radiative heat transfer
from the lower cell to the outer face is not currently modeled, regardless of the location of the face.
Neither condensation nor aerosol deposition is included on the outer face if the face is in another
cell.
The above alternate input format may be used in conjunction with the format presented below and
in Section 14.3.1.3. However, the format in Section 14.3.1.3 must always follow the alternative
format above.
Rev. O B-13 6/30/97