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Unusual thixotropic behavior of a Colombian heavy crude oil. Part I: Rheology and implications on pipeline transport
(UniandesMaestría en Ingeniería QuímicaFacultad de IngenieríaDepartamento de Ingeniería Química y de Alimentos, 2019)
Thixotropic fluids represent an operational challenge for transportation techniques. A Colombian heavy crude oil that exhibits non-Newtonian behavior is studied and thixotropy is observed. A wide range of novel rheological ...
Análise do efeito da compressibilidade no reinício do escoamento de fluido tixotrópico
(Universidade Tecnológica Federal do ParanáCuritibaBrasilGraduação em Engenharia MecânicaUTFPR, 2017-06-22)
The objective of this work is to analyze the compressibility influence on start-up flows of a thixotropic fluid, using also two simpler fluid models: Newtonian and Bingham plastic. The problem is formulated as a horizontal ...
Avaliação de modelos de tixotropia aplicados a fluidos de perfuração
(Universidade Tecnológica Federal do ParanáCuritibaBrasilDepartamento Acadêmico de MecânicaEngenharia MecânicaUTFPR, 2013-09-02)
Drilling fluids present a thixotropic behavior and they usually gel when at rest. The sol-gel transition is fundamental to prevent the deposit of rock fragments, generated by drilling the well, over the drill bit during ...
Análise e modelagem do escoamento transitório de fluidos de perfuração
(Universidade Tecnológica Federal do ParanáCuritibaBrasilPrograma de Pós-Graduação em Engenharia Mecânica e de MateriaisUTFPR, 2015-11-25)
Drilling fluids present a thixotropic behavior and they usually gel when at rest. The sol-gel transition is fundamental to prevent the deposit of rock fragments, generated by drilling the well, over the drill bit during ...
Avaliação da resina poliéster como material alternativo para aplicação em operações de abandono de poços de petróleo
(Universidade Federal do Rio Grande do NorteBrasilUFRNPROGRAMA DE PÓS-GRADUAÇÃO EM QUÍMICA, 2020-09-10)
This work studied polyester resin compositions for application in oil well plug and
abandonment operations. Systems containing pure polyester resin and resin with
mineral filler and thixotropic agent were prepared and ...
The effect of hydrophobic and hydrophilic fumed silica on the rheology of magnetorheological suspensions
(JOURNAL RHEOLOGY AMER INST PHYSICS, 2009)
We investigate magnetorheological fluids (MRFs) prepared with carbonyl iron powder and different types of hydrophobic and hydrophilic fumed silica. The rheological properties of the MRF suspensions were investigated with ...
Aging, rejuvenation and thixotropy in yielding magnetorheological fluids
(Springer, 2013-05)
The yielding behavior of dilute magnetorheological (MR) fluids has been investigated using creep–recovery tests. At very low stress levels, MR fluids behave in the linear viscoelastic regime as demonstrated by the fact ...
Impact of capillary drops of complex fluids on a solid surface
(Amer Inst Physics, 2019-12-01)
The drop impact on a solid surface is studied in the context of complex fluids that exhibit viscoplastic, viscoelastic, and thixotropic behavior. The effects of rheology and surface tension are investigated for a range of ...