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Identification of the influencing input parameters and their effects on the split dynamics of liquid–liquid two-phase mixture through T-junction: a numerical analysis
Journal of the Brazilian Society of Mechanical Sciences and Engineering ( IF 2.2 ) Pub Date : 2020-10-13 , DOI: 10.1007/s40430-020-02650-6
Animesh Kumar , Dibyendu Ghosh , Suman Ghosh

Split dynamics of the liquid–liquid two-phase mixture through horizontal T-junction is numerically investigated by varying the parameters like inlet-volume-fraction, inlet-mixture-velocity, liquid pair, and conduit-diameter. Ultimately, the effects of these parameters on the said dynamics are extracted. 3D steady-state numerical solutions are achieved by adopting a Finite Volume-based Eulerian Multi-Fluid VOF model. To simulate the turbulence, SST kw model is used. Before producing the results, the adopted numerical methodology is successfully validated with the results available in the literature. Composition of the liquid–liquid two-phase mixture obtained along the branch and run arms differ from that along inlet arm. Again, that composition along the branch and run arm are also different from each other. Inertia imbalance is found as the most vital factor to influence the dynamics of phase split. More split is obtained for the mixture with high density-difference between the component liquids. No significant phase split is found for a liquid pair when any one of them has high viscosity. Depending on the conduit-diameter, liquid pair, and inlet-mixture-velocity, a critical inlet-volume-fraction (> 0.5) is found where no split occurs, and the phenomenon of phase split is reversed at the critical inlet-volume-fraction. As the inlet-velocity increases, critical inlet-volume-fraction increases for T-junction having a smaller conduit-diameter, but it increases very slowly for a larger conduit-diameter. With the increment in inlet-velocity, effective phase split reduces for smaller conduit-diameter, and it slightly increases for a larger conduit-diameter. The intensity of the split decreases with the increment in conduit-diameter. Larger critical inlet-volume-fraction is found for a larger conduit-diameter.



中文翻译:

通过T型接头识别影响输入参数及其对液-液两相混合物分离动力学的影响:数值分析

通过改变进口体积分数,进口混合物速度,液体对和导管直径等参数,对液-液两相混合物通过水平T型接头的分离动力学进行了数值研究。最终,提取这些参数对所述动力学的影响。通过采用基于有限体积的欧拉多流体VOF模型,可以实现3D稳态数值解。为了模拟湍流,SST kw使用模型。在产生结果之前,采用文献中可用的结果成功验证了采用的数值方法。沿支臂和支管获得的液-液两相混合物的组成与沿支管得到的不同。同样,沿着分支和运行臂的组成也彼此不同。惯性不平衡被发现是影响相分离动力学的最重要因素。对于在组分液体之间具有高密度差的混合物,获得了更大的分裂。当液体对中的任何一个具有高粘度时,都没有发现明显的相分离。根据导管直径,液体对和入口混合物的速度,发现没有分裂发生的临界入口体积分数(> 0.5),相分离现象在临界入口体积分数处逆转。随着入口速度的增加,对于具有较小导管直径的T型接头,临界入口体积分数会增加,但是对于较大导管直径,临界进口体积分数会非常缓慢地增加。随着入口速度的增加,有效的相分离对于较小的导管直径会减小,而对于较大的导管直径会略有增加。裂口的强度随导管直径的增加而减小。对于较大的导管直径,发现较大的临界入口体积分数。有效的相分离对于较小的导管直径会减小,而对于较大的导管直径会稍微增加。裂口的强度随着导管直径的增加而减小。对于较大的导管直径,发现较大的临界入口体积分数。有效的相分离对于较小的导管直径会减小,而对于较大的导管直径会稍微增加。裂口的强度随着导管直径的增加而减小。对于较大的导管直径,发现较大的临界入口体积分数。

更新日期:2020-10-13
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