2015 CSCE Annual Conference Regina - Building on our Growth Opportunities Conference
Foam mixtures can potentially be employed for preventing underground fire in mining industries, land stabilization and environmental protection. Experimental tests were conducted to model the two-dimensional flow of foam mixtures for two slopes of 10 and 15 degrees. Foaming agent with two different foam-water ratios of 0.1 and 0.2 were used. Correlations were developed to predict the foam length and its frontal velocity with time using dimensional analysis. It was found that the normalized frontal velocity of foam mixtures decreased with normalized time with a slope of ?0.6 in logarithmic scales. To study the effect of bed slope on the flowability of foam mixtures, spreading tests were carried out for four slopes of ? =10, 12, 15 and 18 degrees. Variations of the foam front location in spreading test showed that the foam front location advanced almost linearly with time. For foams with lower foam-water ratio, variation of the foam length with time is independent of the surface slope for ?>10 whereas for foam mixtures with higher foam-water ratio, the foam front advances linearly with time and the frontal velocity increases with increasing the bed slope.