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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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TSURF<br />

= tsurf<br />

QSURF<br />

= qsurf<br />

if the outer surface is exposed to the gas in the same cell, then none <strong>of</strong> the<br />

latter options may be used. An option allowed in general is the STRNUM<br />

option to connect the outer surface to the outer surface <strong>of</strong> a structure in a<br />

different cell.<br />

Note that more than one parameter must be specified in some cases <strong>for</strong><br />

completeness. For example, if HCOEF is specified (or if HCOEF is specified<br />

in a VAR-PARM table), then the temperature seen by the surface must be<br />

defined by specifying either the TGAS or ICELL keyword in the BCOUTER<br />

block. If STRNUM is specified, then the ICELL keyword must be given to<br />

identify the cell <strong>for</strong> the structure “istr,” to which the present structure is<br />

connected. Certain illogical combinations <strong>of</strong> keywords in the BCOUTER<br />

block (including VAR-PARM options) are not allowed. For example, the<br />

specification <strong>of</strong> TSURF and HCOEF in the same BCOUTER block is not<br />

allowed. Also, both TGAS and ICELL can never be specified in the same<br />

BCOUTER block.<br />

the constant temperature to be used as a boundary condition. This<br />

temperature represents a surface temperature; there<strong>for</strong>e, the node-center<br />

temperature reported in the <strong>CONTAIN</strong> output will be different and may<br />

actually vary. The fission product host temperatures <strong>for</strong> a surface, <strong>for</strong><br />

example, will reflect the true constant surface temperature. (K)<br />

the constant heat flux to the surface to be used as a boundary condition.<br />

Again, the temperature <strong>of</strong> the surface will be different from the node center<br />

temperature reported in the <strong>CONTAIN</strong> output. The true surface temperature<br />

is used, <strong>for</strong> example, in the fission product host temperature output <strong>for</strong> a<br />

surface host. (W/m*).<br />

ADIABAT a keyword to speci~ an adiabatic boundary condition. Note that speci~ing<br />

QSURF = Owill also give an adiabatic boundary condition. This keyword is<br />

provided <strong>for</strong> convenience.<br />

HCOEF a constant heat transfer coefficient replacing the default natural convective<br />

= hcoef value <strong>for</strong> an external bounday condition or an outer surface that is exposed<br />

to the gas in a different cell. When “hcoef” is used, the temperature seen by<br />

the outer surface must also be specified with either TGAS or ICELL<br />

keywords (the obsolete TOUTER and IOUTER keywords can also be used).<br />

This boundary condition should not be specified <strong>for</strong> the inner surface or <strong>for</strong><br />

the outer surface when it is in the same cell. Default = 6.08. (W/m*-K)<br />

STRNUM the keyword to speci~ that the outer surface is connected to another structure.<br />

In this boundary condition option, the outer surface <strong>of</strong> the structure is in<br />

thermal contact with the outer surface <strong>of</strong> another structure, which must be in<br />

a different cell. The cell number <strong>of</strong> the connecting structure must be<br />

Rev O 14-91 6/30/97

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