Cloud Rise From High-Explosives Detonations.

Abstract

Data from a s e r i e s of higkexplosives t r i a l s of d e b r i s product cloud top heights v e r s u s t i m e are presented. other experiments and with theory is made. stabilization height can be predicted best a s a function of explosive yield t o the 0.25 p o w e r f o r chemical explosives in average atmospheres. A brief comparison with someIt is concluded that so-called -~

Plutonium explosive dispersal modeling using the MACCS2 computer code

“…This paper presents a theoretical derivation similar to that of Morton et al, and compares its application to the results published by Church in 1969. The theory that is established in this paper agrees with the recommended 20% error bands applied by Church (1969) to the Cloud Top Height (CTH) formula he empirically derived for the atmospheric stability range quoted in his report. Confirmatory calculations on the data as presented by Church (1969) were performed for this report as well.…”

“…The theory that is established in this paper agrees with the recommended 20% error bands applied by Church (1969) to the Cloud Top Height (CTH) formula he empirically derived for the atmospheric stability range quoted in his report. Confirmatory calculations on the data as presented by Church (1969) were performed for this report as well. The correlation coefficient obtained in this report for the logarithmic curve fit to the data is 0.676, and the standard deviation in the data is 1.235.…”

“…However, the typical stem and cap outline is clearly visible at 9 s, 25 s, and 57 s. Church (1969) indicates that the continuing rise of explosive clouds after about 2 minutes was caused by continuing turbulent growth due to the atmosphere as the cloud moved down range. Empirical relations for the determination of near-instantaneous (order of tens of milliseconds) cloud radii from HE explosions are summarized by Baker et al (1983).…”

“…The theoretical predictive formula (Eq. 9) was compared to the time dependent CTH evolution empirically noted in the DT test (Beasely 1965, Church 1969. The agreement between the theoretical formula and the data is noteworthy.…”

Evaluation of the Atmospheric Release Advisory Capability Emergency Response Model for Explosive Sources

“…Figure 1 illustrates the mushroom-shaped geometry characteristic of a cloud that stabilized a few minutes after a ground-level detonation. Particulate clouds were tracked by flash photography and theodolites for 22 evening and nighttime explosions during the May to June, 1963 Project Roller Coaster at the Tonopah Test Range, Nevada (Church, 1969). The measurement technique was considered accurate to within 20%.…”