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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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‘ig,i,k _<br />

— —<br />

~‘jiwji$ ‘g,j,k<br />

[1<br />

dt ji<br />

‘F,j<br />

[VJW’J114:;]<br />

‘I%lci-mn+[+lnon-l)..<br />

(6-14)<br />

where m~,i,~is the mass <strong>of</strong> gas species kin the cell i; [dm/dt] ,~,~epresents the gas mass changes<br />

resulting from DCH chemical reactions (this will only be non-zero <strong>for</strong> Oz, Hz, and HZO species); and<br />

[dm/dt]nO,.K~ represents the gas mass sources and sinks from non-DCH processes, including the<br />

effects <strong>of</strong> gases from submerged flow paths.<br />

The fust two terms account <strong>for</strong> gas flow taking slip into consideration. The governing equations <strong>for</strong><br />

the DCH chemical reactions are given in Section 6.4. The non-DCH processes are discussed in<br />

Chapter 4 and are there<strong>for</strong>e not described here.<br />

The gas energy, debtis mass, and debris energy conservation equations ae provided in the following<br />

sections in a <strong>for</strong>m similar to Equation (6-14). The above derivation is also applicable to the flow<br />

terms in the <strong>for</strong>thcoming expressions and is there<strong>for</strong>e not repeated.<br />

6.2.3 Gas Energy Conservation<br />

The energy conservation equation <strong>for</strong> the atmosphere in a DCH calculation is<br />

dUi<br />

—=<br />

x<br />

dt ji<br />

ejiwjiquj +Pjvj)]<br />

‘[~eijwij][$p~~i)]<br />

+ [%lhem+[aon-w.<br />

‘F,j I<br />

+2{ [%l...v + [%l.(I,J<br />

(6-15)<br />

Rev O 6-11 6/30/97

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