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Title: Mathematical Model to Describe The Propagation of Smoldering In Cellulosic Insulation

Source: In: Proceedings of the Internations conference on Thermal Insulation, Volume 4, p. 1-14, 1982

Author(s): LeVan, Susan; Schaffer, Erwin L.

Publication Year: 1982  View PDF »

Category: Conference Proceedings

Abstract: A mathematical model was developed which predicted the weight loss that would occur under smoldering conditions when the test was conducted according to Federal Specification HH-I-515D. Also a smoldering propagation parameter was identified that was sensitive to various treatment levels. The mathematical model to predict the weight loss was derived from the volumetric shape of the residual char, char density, and wave-front velocity. The predicted weight loss values were in good agreement with the experimental values. The smoldering wave-front velocity was determined for various treatment levels of borax:boric acid-treated newsprint insulation and was found to be a sensitive indicator of the effects of treatment levels. The propagating smoldering wave-front velocities were 17.65 x 10-2 for untreated, 25.92 x 10-2 for 10 percent treatment, 13.97 x 10-2 for 18 percent, and 0 cm/min for 25 percent treatment. The increased smoldering velocity of the 10 percent treatment with respect to untreated is caused by the smolder-promoting effect of boras.

Keywords: Mathematical model, cellulosic Insulation, propagation

File size: 336 kb(s)

Date posted: 05/02/2011

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