10.08.2013 Views

Code Manual for CONTAIN 2.0 - Federation of American Scientists

Code Manual for CONTAIN 2.0 - Federation of American Scientists

Code Manual for CONTAIN 2.0 - Federation of American Scientists

SHOW MORE
SHOW LESS

Create successful ePaper yourself

Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.

This example implies at least two tables and at least three structures in the cell. In this example,the<br />

first table defines the <strong>for</strong>ced convection associated with the first and second structures, while the ~<br />

second table defines the <strong>for</strong>ced convection associated with the third structure.<br />

B.2.6 Alternative Radiation Input Block Format<br />

The RADIAT keyword and the associated alternative radiation input maybe used in place <strong>of</strong> the<br />

keyword RAD-HEAT to activate the radiation model. This alternate input <strong>for</strong>mat is capable <strong>of</strong><br />

activating only the direct gas-structure radiation model. In order to use the net enclosure model, the<br />

RAD-HEAT input block must be used.<br />

RADIAT<br />

BEAML (bead)<br />

EMSVT (emsvt)<br />

[PBEAML pbml PEMSVT pevt]<br />

[MODAK]<br />

EOI<br />

The BEAML and EMSVT keywords are always followed by only “nhtm” values (one <strong>for</strong> each<br />

structure in the cell). The beam length and ernissivity <strong>of</strong> the topmost lower cell layer (usually the<br />

pool) are input via the keywords PBEAML and PEMSVT. The beam lengths in this input block are<br />

the same as the geometric beam lengths given under the GEOBL keyword in the RAD-HEAT block<br />

and should not be confused with the net enclosure inter-surface beam lengths. Also note that when<br />

using the RADIAT input, the Cess-Lian correlation is used by default <strong>for</strong> the gas mixture emissivity<br />

calculations. The MODAK keyword is used to override this default. Use <strong>of</strong> the RADIAT input<br />

<strong>for</strong>mat is discouraged as new options are not accessible within this <strong>for</strong>mat.<br />

B.2.7 Alternative KMX Input Option<br />

The use <strong>of</strong> negative value <strong>for</strong> KMX in the RAD-HEAT radiation input block overrides the gas<br />

mixture ernissivity calculation.<br />

KMx=-kmx<br />

when “kmx” is entered with an overall negative sign it overrides the<br />

= -kmx calculated gas emissivity. The value specified is the negative <strong>of</strong> the desired<br />

gas mixture emissivity. The negative sign is required since the KMX<br />

keyword followed by a positive number is used as an aerosol density<br />

multiplier as described in Section 14.3.1.5.<br />

Rev O B16 6/30/97

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!