Abstract
This paper concerns with the scale-up method of pressure loss in coarse solid-liquid two-phase flow in horizontal pipes. In general, for economic reasons, the transport velocity is determined in the range of the flow with a moving bed. Therefore, the published data on the flow with a moving bed were analyzed, and an empirical equation to scale up the pressure loss (method I) was obtained. It was confirmed that calculated results agreed with the experimental ones within 30%. Furthermore, a scale-up method of pressure loss (method II) was established based on the moving bed model. This method gave the accurate estimations of pressure loss. However, it involves two unknown variables, so the experiments have to be conducted using two different kinds of pipes. The previous method for fine particles (so called is method) was modified to be applicable regardless of the particle diameter (method III).
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