Modeling the initial mechanical response and yielding behavior of gelled crude oil
The initial mechanical response and yielding behavior of gelled crude oil under constant shear rate conditions were investigated. By putting the Maxwell mechanical analog and a special dashpot in parallel, a quasi-Jeffreys model was obtained. The kinetic equation of the structural parameter in the H...
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doaj-bc233a50ba0841db93cd31de6ff511b52021-09-05T13:59:35ZengDe GruyterOpen Physics2391-54712018-05-0116129230110.1515/phys-2018-0041phys-2018-0041Modeling the initial mechanical response and yielding behavior of gelled crude oilLei Chen0Gang Liu1Xingguo Lu2Minghai Xu3Yuannan Tang4College of Pipeline and Civil Engineering, China University of Petroleum (East China), Qingdao266580, ChinaCollege of Pipeline and Civil Engineering, China University of Petroleum (East China), Qingdao266580, ChinaCollege of Pipeline and Civil Engineering, China University of Petroleum (East China), Qingdao266580, ChinaCollege of Pipeline and Civil Engineering, China University of Petroleum (East China), Qingdao266580, ChinaCollege of Pipeline and Civil Engineering, China University of Petroleum (East China), Qingdao266580, ChinaThe initial mechanical response and yielding behavior of gelled crude oil under constant shear rate conditions were investigated. By putting the Maxwell mechanical analog and a special dashpot in parallel, a quasi-Jeffreys model was obtained. The kinetic equation of the structural parameter in the Houska model was simplified reasonably so that a simplified constitutive equation of the special dashpot was expressed. By introducing a damage factor into the constitutive equation of the special dashpot and the Maxwell mechanical analog, we established a constitutive equation of the quasi-Jeffreys model. Rheological tests of gelled crude oil were conducted by imposing constant shear rates and the relationship between the shear stress and shear strain under different shear rates was plotted. It is found that the constitutive equation can fit the experimental data well under a wide range of shear rates. Based on the fitted parameters in the quasi-Jeffreys model, the shear stress changing rules of the Maxwell mechanical analog and the special dashpot were calculated and analyzed. It is found that the critical yield strain and the corresponding shear strain where shear stress of the Maxwell analog is the maximum change slightly under different shear rates. And then a critical damage softening strain which is irrelevant to the shearing conditions was put forward to describe the yielding behavior of gelled crude oil.https://doi.org/10.1515/phys-2018-0041gelled crude oilinitial mechanical responseyieldingdamage variablecritical damage softening strain83.60.pq83.60.la83.60.df |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Lei Chen Gang Liu Xingguo Lu Minghai Xu Yuannan Tang |
spellingShingle |
Lei Chen Gang Liu Xingguo Lu Minghai Xu Yuannan Tang Modeling the initial mechanical response and yielding behavior of gelled crude oil Open Physics gelled crude oil initial mechanical response yielding damage variable critical damage softening strain 83.60.pq 83.60.la 83.60.df |
author_facet |
Lei Chen Gang Liu Xingguo Lu Minghai Xu Yuannan Tang |
author_sort |
Lei Chen |
title |
Modeling the initial mechanical response and yielding behavior of gelled crude oil |
title_short |
Modeling the initial mechanical response and yielding behavior of gelled crude oil |
title_full |
Modeling the initial mechanical response and yielding behavior of gelled crude oil |
title_fullStr |
Modeling the initial mechanical response and yielding behavior of gelled crude oil |
title_full_unstemmed |
Modeling the initial mechanical response and yielding behavior of gelled crude oil |
title_sort |
modeling the initial mechanical response and yielding behavior of gelled crude oil |
publisher |
De Gruyter |
series |
Open Physics |
issn |
2391-5471 |
publishDate |
2018-05-01 |
description |
The initial mechanical response and yielding behavior of gelled crude oil under constant shear rate conditions were investigated. By putting the Maxwell mechanical analog and a special dashpot in parallel, a quasi-Jeffreys model was obtained. The kinetic equation of the structural parameter in the Houska model was simplified reasonably so that a simplified constitutive equation of the special dashpot was expressed. By introducing a damage factor into the constitutive equation of the special dashpot and the Maxwell mechanical analog, we established a constitutive equation of the quasi-Jeffreys model. Rheological tests of gelled crude oil were conducted by imposing constant shear rates and the relationship between the shear stress and shear strain under different shear rates was plotted. It is found that the constitutive equation can fit the experimental data well under a wide range of shear rates. Based on the fitted parameters in the quasi-Jeffreys model, the shear stress changing rules of the Maxwell mechanical analog and the special dashpot were calculated and analyzed. It is found that the critical yield strain and the corresponding shear strain where shear stress of the Maxwell analog is the maximum change slightly under different shear rates. And then a critical damage softening strain which is irrelevant to the shearing conditions was put forward to describe the yielding behavior of gelled crude oil. |
topic |
gelled crude oil initial mechanical response yielding damage variable critical damage softening strain 83.60.pq 83.60.la 83.60.df |
url |
https://doi.org/10.1515/phys-2018-0041 |
work_keys_str_mv |
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