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Numerical method for interfacial heat transfer in an oil-water displacement flow

机译：油水排量流动界面传热的数值方法

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摘要

A numerical study of interfacial heat transfer is per-formed in an oil-water displacement flow. The pro-cess of oil-water displacement is one of the key technologies for the underwater tank in offshore oil exploitation. There is a need to investigate the inter-facial heat transfer between oil and water as the wax precipitation and solidification of high pour point crude oil at low temperature will particularly affect the flow of oil. Before the numerical simulation is performed, it is necessary to find out the optimal numerical method. For the volume of fluid method, the property parameters in the temperature equation are mixture ones weighted by each fluid. When the unsteady term, convective term, and diffusion term are considered, there are three property parameters that are the coefficient of each term. For each coef-ficient, whether an algebraic scheme or a harmonic scheme could be used. When the three coefficients are considered together, there would be eight com-binations of weighting form. A numerical method is developed by exploring an optimal combination of the weighting form. The results are demonstrated with an analytical solution. It is found that the combination of three harmonic schemes will sig-nificantly improve the error. The maximum and total error from this combination are reduced by 62% and 79% compared to the second-best one and by 86% and 93% compared to the worst one. Meanwhile, the clock time only increases by 1.6% and 0.4%. The combina-tions of three harmonic schemes will result in the largest order of accuracy which is as large as 1.60. The harmonic scheme should be used for the prop-erty parameter of all the three terms in the vertical oil-water flow.
机译：界面传热的数值研究在油水排量流动中形成。油水位移的亲电磁是海上石油剥削中水下坦克的关键技术之一。需要研究油和水之间的面部间热传递，因为低温下高倾点原油的蜡沉淀和凝固将特别影响油流量。在执行数值模拟之前，有必要找出最佳数值方法。对于流体方法的体积，温度方程中的性质参数是由每个流体加权的混合体。当考虑不稳定的术语，对流术语和扩散项时，有三个属性参数是每个术语的系数。对于每个COEF，可以使用代数方案或谐波方案。当三个系数被认为在一起时，将存在八种加权形式的COM曲线。通过探索加权形式的最佳组合来开发数值方法。结果用分析溶液进行了证明。结果发现，三个谐波方案的组合将分别地改善误差。与最糟糕的一个相比，该组合的最大和总误差减少了62％和79％，而第二次，并将其与最糟糕的相比达到86％和93％。同时，时钟时间仅增加1.6％和0.4％。三个谐波方案的Combina-Tions将导致最大的准确度，大约1.60。谐波方案应用于垂直油流动中所有三个术语的Prop-erty参数。

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