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首页> 外文期刊>Applied Mathematical Modelling >Modelling wax diffusion in crude oils: The cold finger device
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Modelling wax diffusion in crude oils: The cold finger device

机译:模拟原油中蜡的扩散:冷指装置

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In this paper we show how to obtain wax diffusivity and solubility values in crude oils from deposition measurements in the cold finger device with stirring. Providing a rather accurate knowledge of such quantities is of great importance in predicting the wax deposition rate in pipelines. We present a mathematical model in which the physical quantities are assumed to be space-independent in the bulk region of the device, because of agitation, so that mass transport occur in relatively thin boundary layers. As a consequence the deposition phenomenon is accelerated with respect to the static device (see [S. Correra, A. Fasano, L. Fusi, M. Primicerio, F. Rosso. Wax diffusivity under given thermal gradient: a mathematical model, to appear on ZAMM]), shortening the duration of experiments. Comparison with some available laboratory measurements shows a satisfactory agreement and the values obtained are in the range of those usually adopted by practitioners.
机译:在本文中,我们展示了如何通过在搅拌下在冷指装置中进行沉积测量来获得蜡在原油中的扩散率和溶解度值。提供这样的数量的相当准确的知识对于预测管道中的蜡沉积速率非常重要。我们提出了一个数学模型,其中由于搅动,假定物理量在设备的主体区域中是空间独立的,因此质量传输发生在相对较薄的边界层中。结果,相对于静态器件,沉积现象得以加速(参见[S. Correra,A. Fasano,L. Fusi,M. Primicerio,F. Rosso。在给定的热梯度下蜡扩散率:数学模型的出现在ZAMM上)),从而缩短了实验时间。与一些可用的实验室测量结果的比较显示出令人满意的一致性,并且所获得的值在从业人员通常采用的范围内。

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