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Category: Bulk Solids
Question: What is a "saltation velocity" and how is it used in designing pneumatic conveying systems?
Keywords: pneumatic,conveying,saltation,velocity,design,gas
Answer: The saltation velocity is defined as the actual gas velocity (in a horizontal pipe run) at which the particles of a homogeneous solid flow will start to fall out of the gas stream.
In designing, the saltation velocity is used as a basis for choosing the design gas velocity in a pneumatic conveying system. Usually, the saltation gas velocity is multiplied by a factor, which is dependent on the nature of the solids, to arrive at a design gas velocity.
For example, the saltation velocity factor for fine particles may be on the order of 2.5 while the factor could be as high as 5 for course particles such as soy beans.


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