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首页> 外文期刊>Journal of Engineering & Applied Sciences >A Study of the Agglomeration of Sand Particles in Turbulent Flowlines Using the Monte-Carlo Agglomeration Model Based on Smoluchowski Equation
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A Study of the Agglomeration of Sand Particles in Turbulent Flowlines Using the Monte-Carlo Agglomeration Model Based on Smoluchowski Equation

机译：基于Smoluchowski方程的蒙特卡罗团聚模型研究湍流线中沙粒的团聚

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摘要

In Nigeria, one of the transmission pipeline installation companies was faced with early pipe leakage problem in one of their installations. Several experimental tests were done to determine the root cause and one of the tests suggested strong evidence linking the leakage problem to the interactions between the agglomerated particles and the pipe wall. The limited space in the pipe could cause flow constriction that could lead to pipe burst due to high pressure exertion that could in turn also increase the flow shear stress. Therefore, this research was carried out to find the particle build up pattern and attendant locations. The study uses the Monte-Carlo agglomeration model that is based on smoluchowski equation to investigate the agglomeration of slurry of particles in fluid transmission pipelines. From the model, particle diameter and aggregate diameter were determined to be 4.8 and 6.0 μm, respectively, with a population of 1.5. These values indicate that the slurry could not form actual aggregates of particles. The cause of leakages could be due to the high flow rate intermixed with high quantity of sand particles in suspension in the pipeline. However, the loss of aggregates may be attributed to proper administration of dispersants in the pipeline and the application of mechanical pigs for routine cleaning.
机译：在尼日利亚，其中一家传输管道安装公司的其中一台设备面临早期管道泄漏的问题。进行了几项实验测试以确定根本原因，其中一项测试提出了强有力的证据，将泄漏问题与附聚颗粒与管壁之间的相互作用联系起来。管道中有限的空间可能会导致流量收缩，这可能由于高压施加而导致管道爆裂，进而又会增加流量剪切应力。因此，进行了这项研究以发现粒子的聚集模式和伴随位置。该研究使用基于smoluchowski方程的Monte-Carlo附聚模型来研究流体传输管道中颗粒浆料的附聚。根据该模型，粒径和聚集体直径分别确定为4.8和6.0μm，人口为1.5。这些值表明浆液不能形成颗粒的实际聚集体。泄漏的原因可能是由于高流速与管道中悬浮的大量沙粒混合。但是，骨料的损失可能归因于在管道中正确分配分散剂以及使用机械清管器进行常规清洁。

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