Clogging reduction by addition of small particles of various material densities

IF 2.4 3区工程技术

Granular Matter Pub Date : 2024-07-10 DOI:10.1007/s10035-024-01444-0

Sandip H. Gharat, Julián Montero, Luis A. Pugnaloni

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Abstract

We present an experimental investigation on the flow and clogging of bi-disperse mixtures of coarse and fine grains of different densities passing through small orifices. We vary the density ratio (coarse/fine) from 1.87 down to 0.79 by using amaranth seeds, glass and ceramic beads of similar size as the fine species in combination with 2.0 mm glass beads as the coarse grains. We analyzed the effect of the density ratio on the effective flow rate of the coarse species, the segregation during flow and the clogging for a range of orifice diameters. As in previous studies, the flow of the coarse grains is facilitated by the fine species, which prevents clogging. We show that the effective flow rate of the coarse species is virtually independent of the density ratio. These results suggest that in practical applications with the goal of clogging reduction, the density of the fine species used to ease the flow is not a relevant parameter and can be selected based on practical or economic constraints.

Graphic abstract

Schematic diagram of the flow of large grains through a small orifice when they are diluted in a mixture with fine grains

Abstract Image

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通过添加不同密度的小颗粒减少堵塞

我们对不同密度的粗粒和细粒双分散混合物通过小孔时的流动和堵塞情况进行了实验研究。我们使用苋菜籽、玻璃珠和陶瓷珠作为细粒，再结合 2.0 毫米的玻璃珠作为粗粒，将密度比（粗粒/细粒）从 1.87 降到 0.79。我们分析了密度比对粗粒有效流速、流动过程中的偏析和孔径范围内的堵塞的影响。与之前的研究一样，粗颗粒的流动受到细颗粒的促进，从而防止了堵塞。我们的研究表明，粗粒的有效流速几乎与密度比无关。这些结果表明，在以减少堵塞为目标的实际应用中，用于疏导流动的细粒的密度并不是一个相关参数，可以根据实际或经济限制进行选择。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Granular Matter MATERIALS SCIENCE, MULTIDISCIPLINARY-MECHANICS

CiteScore

4.30

自引率

8.30%

发文量

期刊介绍： Although many phenomena observed in granular materials are still not yet fully understood, important contributions have been made to further our understanding using modern tools from statistical mechanics, micro-mechanics, and computational science. These modern tools apply to disordered systems, phase transitions, instabilities or intermittent behavior and the performance of discrete particle simulations. >> Until now, however, many of these results were only to be found scattered throughout the literature. Physicists are often unaware of the theories and results published by engineers or other fields - and vice versa. The journal Granular Matter thus serves as an interdisciplinary platform of communication among researchers of various disciplines who are involved in the basic research on granular media. It helps to establish a common language and gather articles under one single roof that up to now have been spread over many journals in a variety of fields. Notwithstanding, highly applied or technical work is beyond the scope of this journal.