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1.1.4.8 Stable ‑ Buoyancy Rise.

     For situations where ΔT exceeds (ΔT)c as determined above, buoyancy is assumed to dominate.  The distance to final rise, xf, is determined by the equivalent of a combination of Equations (48) and (59) in Briggs, (1975), p. 96:

     The plume height, he, is determined by the equivalent of Equation (59) (Briggs, 1975, p. 96):

1.1.4.9 Stable ‑ Momentum Rise.

     Where the stack gas temperature is less than or equal to the ambient air temperature, the assumption is made that the plume rise is dominated by momentum.  If ΔT is less than (ΔT)c as determined by Equation (1‑18), the assumption is also made that the plume rise is dominated by momentum.  The plume height is calculated from Equation 4.28 of Briggs ((1969), p. 59):

The equation for unstable‑neutral momentum rise (1‑16) is also evaluated.  The lower result of these two equations is used as the resulting plume height, since stable plume rise should not exceed unstable-neutral plume rise.

 

 

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  APLICACIONES castellano: DIS CUS DES  RAD   english: DIS CUS DES RAD  

 

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