کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
208208 461242 2007 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Viscoelastic models for Mexican heavy crude oil and comparison with a mixture of heptadecane and eicosane. Part II
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Viscoelastic models for Mexican heavy crude oil and comparison with a mixture of heptadecane and eicosane. Part II
چکیده انگلیسی

The viscoelastic properties of crude oils, at a fixed temperature, can be interpreted in terms of a distribution of relaxation times. A square relaxation spectrum applied to the Maxwell model is in accordance with experimental results obtained for a crude oil specimen from the Cantarell reservoir in south-east Mexico. As a continuation of a previous paper, the Weissenberg number formerly proposed for steady viscosity, is also proposed to scale G′ and G″ at different temperatures. Although, the mixture of n-heptadecane and n-eicosane provided good results in the description of viscous properties of the considered crude oil – as reported in the previous paper – the viscoelastic properties of the mixture of n-heptadecane and n-eicosane are very poor in comparison to those of crude oil. In general, aging of crude oil causes an increment of tan δ quicker with temperature increment. Moreover, two years of aging cause a huge increment of G′. The main objective of this paper is providing a suitable and complete model to describe the viscoelastic properties of the considered crude oil.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Fuel - Volume 86, Issue 15, October 2007, Pages 2403–2409
نویسندگان
, , ,