In this paper J.G. Oldroyd's ideas leading to the modern understanding of wall slip phenomena are discussed. The procedure proposed by Oldroyd to analyze experimental data that imply the presence of slip is illustrated to (i) determine the slip velocity as a function of wall shear stress and (ii) to recover the true rheological parameters of the material in the absence of slip. The Oldroyd method is demonstrated by using capillary data for a Thermoplastic Vulcanizate (TPV) polymer melt and a bread dough.

中文翻译：

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JG Oldroyd的早期思想导致了对墙滑的现代理解

本文讨论了JG Oldroyd的思想，该思想导致了对壁滑现象的现代理解。Oldroyd提出的分析实验数据的程序，该程序暗示存在滑移，说明了（i）确定滑移速度与墙体剪应力的关系，以及（ii）在不存在滑移的情况下恢复材料的真实流变参数。Oldroyd方法通过使用热塑性硫化橡胶（TPV）聚合物熔体和面包面团的毛细管数据得到证明。