Articles in this issue

Hydraulic Transport of Sand/Shell Mixtures in Relation with the Critical Velocity
Hydraulic Transport of Sand/Shell Mixtures in Relation with the Critical Velocity

When pumping shells through a pipeline, a much higher velocity is required to make them erode and go back into suspension, because although the settling velocity of shells is much lower than equivalent sand particles, the erosion velocity is much higher.

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Aerial view of the 6-acre (2.5 ha) processing facility and offices along the banks of the Fox River in northern Wisconsin where a major cleanup project, involving dredging, capping with coarse sand and separating clean sand and dewatering the fine sediments with membrane presses, is taking place in order to remove PCB contamination and restore the natural beauty of the river
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Published March 2011