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Code Manual for CONTAIN 2.0 - Federation of American Scientists

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.-<br />

AREA,i,j<br />

= area<br />

AVL,i,j<br />

= avl<br />

CFC,i,j<br />

= Cfc<br />

CFRFLAG,i,j<br />

= cflag<br />

FLOW,i,j<br />

= flow<br />

TOPEN,i,j<br />

= topen<br />

TCLOSE,i,j<br />

= tclose<br />

DP,i,j<br />

= dp<br />

PDAFLAG,i,j<br />

= pflag<br />

the (constant) cross-sectional area <strong>of</strong> flow path when open. (m2)<br />

the ratio <strong>of</strong> effective flow path area to inertial length. The value corresponds<br />

to Aij ~lj in the conservation <strong>of</strong> momentum equation in Table 4-2. (m)<br />

the flow loss coefficient. This coefficient includes entrance, exit, and other<br />

discontinuity losses as well as frictional losses. The value corresponds to Cm<br />

in the conservation <strong>of</strong> momentum equation given in Table 4-2.<br />

(dimensionless)<br />

the flag that specifies that the “flow” value discussed below is a constant rate,<br />

as opposed to the initial flow rate. Speci@ 1 if the units <strong>of</strong> the specified<br />

“floW” value are l@, or -1 if the units are m3/s. If CFRFLAG is not<br />

specified, the value specified <strong>for</strong> “flow” is interpreted as an initial flow rate<br />

rather than a constant flow rate.<br />

a constant or initial flow rate. (CFRFLAG, discussed above, is a flag that<br />

indicates that the value specified <strong>for</strong> “flow” is a constant flow rate. If<br />

CFRFLAG is not specified, then the value <strong>for</strong> “flow” is taken to be an initial<br />

flow rate.) The value <strong>for</strong> “flow” should be positive if the flow is in the<br />

direction from cell i to cell j. Note kg/s or m3/s units are allowed if a constant<br />

flow rate is specified (see CFRFLAG above); only kg/s is allowed if an<br />

initial flow rate is specified. Default= O. (kg/s or m3/s)<br />

the time to open the flow path. Default= -1030. (s)<br />

the time to close the flow path. Default= 1030. (s)<br />

the positive deftite pressure difference to open the flow path. The pressure<br />

difference across the flow path is compared to the value <strong>of</strong> the appropriate<br />

“alp.” If the pressure difference exceeds this value and the flow path is<br />

closed, the flow path is opened. The pressure difference is checked only until<br />

“alp” is exceeded the first time, even if the flow path is open at that point.<br />

Once the flow path is open, it remains open even if the actual pressure<br />

difference drops below the opening value. DP,i,j determines the opening<br />

pressure difference when the pressure in cell i is greater than that in cell j.<br />

The value <strong>for</strong> DP,i,j does not have to be same as that <strong>for</strong> DP,j,i. It is assumed<br />

that the values are equal unless both DP,i,j and DP,j,i are specified. (Pa)<br />

a flag used with the area-versus-pressure option within the VAR-AREA table<br />

option. A value <strong>of</strong> 1 implies a reversible pressure-dependent area. A value<br />

R O B3 6/30/97

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