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Code Manual for CONTAIN 2.0 - Federation of American Scientists

Code Manual for CONTAIN 2.0 - Federation of American Scientists

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The user is reminded that the default natural convection correlations in Equations (10-20) through<br />

(10-22) are overridden if the user specifies even one <strong>of</strong> the three keywords ROHAND, NATCOR1,<br />

or NATCOR2. Otherwise, the default natural convection correlations remain in effect. Likewise,<br />

the default <strong>for</strong>ced convection correlation in Equation (10-23) is overridden if even one <strong>of</strong> the<br />

keywords FORCOR1 or FORCOR2 is specified. Otherwise, the default <strong>for</strong>ced convection<br />

correlation remains in effect. If a table option is used to define <strong>for</strong>ced convection in<strong>for</strong>mation in<br />

addition to FORCOR1 and/or FORCOR2, the resulting Reynolds numbers will be used in the userdefined<br />

<strong>for</strong>ced convection correlations unless N~u,~has been specified directly in the table. In this<br />

case, FORCOR1 and/or FORCOR2 will be ignored. As be<strong>for</strong>e, the value <strong>of</strong> the N~ueventually used<br />

will be based upon max(N~U,C,N~u,f)unless MIXED input is specified.<br />

The following keywords are used to specify external or <strong>for</strong>ced convective boundary conditions in<br />

tabular <strong>for</strong>m. The <strong>for</strong>mat is a standard one <strong>for</strong> global or cell level tables, as discussed in<br />

Section 14.4.2. The optional keywords FLAG and NAME are discussed in that section. Note that<br />

only one table may be specified <strong>for</strong> each surface.<br />

VAR-PARM the keyword to begin the specification <strong>of</strong> a boundary condition table. The<br />

tabular boundary conditions can be specified as a function <strong>of</strong> time, cell<br />

temperature, gas-wall temperature difference, or cell pressure. The number<br />

<strong>of</strong> points in the table may not exceed the value <strong>of</strong> “maxtbc” specified in the<br />

cell CONTROL block.<br />

VAR-X<br />

x<br />

np<br />

Xpts<br />

VAR-Y<br />

required keyword to speci~ the independent variable. The available options<br />

<strong>for</strong> the name <strong>of</strong> the independent variable to follow are:<br />

TIME - time (s)<br />

TGAS - gas temperature adjacent to face (K)<br />

DELTA-T - gas temperature minus surface temperature. (K)<br />

PGAS - pressure <strong>of</strong> cell adjacent to face (Pa)<br />

Note that <strong>for</strong> a TIME table, the value <strong>for</strong> VAR-Y will be set to zero outside<br />

<strong>of</strong> the range <strong>of</strong> the table; <strong>for</strong> other options, end point values will be used.<br />

When used with BCOUTER to specify the outer boundary condition, the cell<br />

temperature or pressure are those <strong>of</strong> cell “icell.”<br />

the required keyword to initiate the input <strong>of</strong> the independent variable values<br />

in the table.<br />

the number <strong>of</strong> points in the table.<br />

specify “rip”values <strong>of</strong> the independent variable in ascending order.<br />

the required keyword to specify the dependent variable. For a BCINNER<br />

boundary condition or a BCOUTER boundary condition in the same cell,<br />

Rev O 14 85 6/30/97

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