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- W3201775457 abstract "This paper attempts to investigate the viscoelastic nature of eight Crude Oil (CO) samples from the Upper Assam Basin, India. Viscoelasticity was studied using Dynamic Mechanical Analysis (DMA) where shear stress was applied to the CO samples and the resulting displacement (shear strain) was measured. CO transportation through pipelines face serious problems due to their high pour (PP) point and viscosity. In this work, Dynamic Modulus (G∗) was calculated using which the storage and the loss modulus were determined to study the elastic and viscous nature of the samples at 30 °C as the average Pour Point (PP) of the CO samples was near 30 °C. So, especially during the extreme winter season in Assam, when the ambient temperature falls drastically, the lighter components come out from the liquid and precipitates in the inner wall of the pipeline which affects the flow through the pipeline. So, a better understanding of the flow behavior of CO is very important as this will help to identify whether flow improving methods are required or not. Here, in this work viscoelastic properties of the CO samples were investigated from where yield point was determined. Crossover points or the Yield Point (YP) of the samples were determined to understand the flow characteristics before and after the crossover point. All the CO samples were observed to be viscous after the yield point except for two CO samples. Yield stress and yield strain of the samples were calculated from the YP, which exhibited non-Newtonian behavior with maximum yield stress up to 35Pa. After reaching the YP, the CO samples showed the dominance of viscous nature over elastic nature except for two samples. Loss tangent or tan θ was also calculated to validate the viscoelasticity of the samples. This study was done to investigate the flow behavior of CO samples of the Upper Assam Basin for pipeline transportation." @default.
- W3201775457 created "2021-10-11" @default.
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- W3201775457 date "2022-06-01" @default.
- W3201775457 modified "2023-10-18" @default.
- W3201775457 title "Investigation of flow behavior of crude oils with emphasis to upper Assam Basin, India" @default.
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- W3201775457 doi "https://doi.org/10.1016/j.ptlrs.2021.09.009" @default.
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