Pneumatic conveying is one of the most popular methods of moving particulate material from one point to another. Effective pneumatic conveying of particles requires some knowledge of how particle properties affect flow behavior. The magnitude of pressure loss experienced over a certain length of pipe is of key interest to those designing bulk powder processes. Traditional calculations use generic correlations and models that were usually developed for a specific set of conditions; as a result, most pressure drop predictions have some level of error associated with them. In fact, particle properties such as size, shape, electrostatic behavior and mass loading can have a significant effect on the overall pressure drop in a pneumatic conveying line. Present work focuses on how pressure drop in a pipe is affected by the addition of particles having different physical properties. Results from a popular correlation will be compared to those made by a model previously developed in an attempt to identify which pressure drop components need improvement. In addition, experimental data from the fully- fullydeveloped developed region of an upward flowing vertical conveying line will be used as a guideline for these comparisons.
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