Abstract This paper deals with methods to predict residue (heel) in a tank after drainage of polymer gels from the tank. Gels of various rheological properties were considered in which a thixotrope (Xanthan gum) and a thickener (carboxymethyl cellulose) were combined in various ratios so as to change the gel flow curve from strongly to weakly shear thinning. Computational fluid dynamics allows the conversion of rheological data collected on a rotational rheometer into quantitative prediction of the heel. A complementary method to provide insight into the fluid mechanics of tank draining uses contraction flow visualized by magnetic resonance imaging (MRI). The size of the stagnant zone which develops in such flow may also be used as a predictor of the heel during drainage. CFD modeling utilizing a simplified Carreau model, where viscoelasticity was neglected and fitting parameters were extracted from rheometry, was successful in predicting the heel mass in the gel tank.

中文翻译：

---

压力驱动从罐中排出凝胶期间的足跟估计

摘要 本文讨论了在聚合物凝胶从罐中排出后预测罐中残留物（后跟）的方法。考虑了各种流变特性的凝胶，其中触变剂（黄原胶）和增稠剂（羧甲基纤维素）以各种比例组合，以便将凝胶流动曲线从强剪切稀化变为弱剪切稀化。计算流体动力学允许将在旋转流变仪上收集的流变数据转换为足跟的定量预测。一种通过磁共振成像 (MRI) 可视化收缩流来深入了解储罐排水流体力学的补充方法。在这种流动中形成的停滞区的大小也可以用作排水过程中跟部的预测指标。使用简化的 Carreau 模型进行 CFD 建模，