Applied Rheology最新文献_第9页

Characterization of velocity fluctuations and the transition from transient to steady state shear banding with and without pre-shear in a wormlike micelle solution under shear startup by Rheo-NMR 用Rheo NMR表征剪切启动下蠕虫状胶束溶液中的速度波动和从瞬态剪切带到稳态剪切带的转变

IF 1.8 4区工程技术

Applied Rheology Pub Date : 2020-01-01 DOI: 10.1515/arh-2020-0001

Rehab N. Al-Kaby, S. Codd, J. Seymour, Jennifer R. Brown

{"title":"Characterization of velocity fluctuations and the transition from transient to steady state shear banding with and without pre-shear in a wormlike micelle solution under shear startup by Rheo-NMR","authors":"Rehab N. Al-Kaby, S. Codd, J. Seymour, Jennifer R. Brown","doi":"10.1515/arh-2020-0001","DOIUrl":"https://doi.org/10.1515/arh-2020-0001","url":null,"abstract":"Abstract Rheo-NMR velocimetry was used to study shear banding of a 6 wt.% cetylpyridinium chloride (CPCl) worm-like micelle solution under shear startup conditions with and without pre-shear. 1D velocity profiles across the fluid gap of a concentric cylinder Couette shear cell were measured every 1 s following shear startup for four different applied shear rates within the stress plateau. Fitting of the velocity profiles allowed calculation of the shear banding characteristics (shear rates in the high and low shear band, the interface position and apparent slip at the inner rotating wall) as the flow transitioned from transient to steady state regimes. Characteristic timescales to reach steady state were obtained and found to be similar for all shear banding characteristics. Timescales decreased with increasing applied shear rate. Large temporal fluctuations with time were also observed and Fourier transform of the time and velocity autocorrelation functions quantified the fluctuation frequencies. Frequencies corresponded to the elastically driven hydrodynamic instabilities, i.e. vortices, that are known to occur in the unstable high shear band and were dependent upon both applied shear rate and the pre-shear protocol.","PeriodicalId":50738,"journal":{"name":"Applied Rheology","volume":"30 1","pages":"1 - 13"},"PeriodicalIF":1.8,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1515/arh-2020-0001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47759329","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Correlating Coating Quality of Coverage with Rheology for Mica-Based Paints 云母基涂料覆盖质量与流变性的关系

IF 1.8 4区工程技术

Applied Rheology Pub Date : 2020-01-01 DOI: 10.1515/arh-2020-0110

Jacob P. Anderson, Shailesh Shori, E. Jabbari, H. Ploehn, F. Gadala-Maria, D. Priftis

{"title":"Correlating Coating Quality of Coverage with Rheology for Mica-Based Paints","authors":"Jacob P. Anderson, Shailesh Shori, E. Jabbari, H. Ploehn, F. Gadala-Maria, D. Priftis","doi":"10.1515/arh-2020-0110","DOIUrl":"https://doi.org/10.1515/arh-2020-0110","url":null,"abstract":"Abstract This paper examines the relationship between rheology and the qualitative appearance of dried, mica-based paint coatings used in the aerospace industry. The goal is to identify key rheological characteristics indicative of poor coating visual appearance, providing a screening tool to identify unsatisfactory paint formulations. Four mica paints were studied, having coating visual appearances ranging from very poor to very good. Strain sweeps indicated that the poor-quality paints have a smaller % strain midpoint in the linear visco-elastic range; while the good-quality paints have a lower G’/G” cross-over point in frequency sweeps. Thixotropy experiments utilizing single and multiple-loop hysteresis cycles plotting shear stress as a function of shear rate showed that the base mica paints with good appearance had nearly constant, reversible profiles in the forward and the backward directions; while the mica paints with poor appearance were irreversible with a noticeable gradual change in shear stress as more loops are run. The difference in area between the forward and the reverse curves was determined, leading to a quantifiable criterion that can differentiate good paints from poor paints with significance testing. This work would establish the first rheology model using hysteresis loops to predict the visual properties of mica-based paints.","PeriodicalId":50738,"journal":{"name":"Applied Rheology","volume":"30 1","pages":"119 - 129"},"PeriodicalIF":1.8,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1515/arh-2020-0110","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45030618","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Rheological behavior of a bentonite mud 膨润土泥浆的流变特性

IF 1.8 4区工程技术

Applied Rheology Pub Date : 2020-01-01 DOI: 10.1515/arh-2020-0108

D. Marum, M. Afonso, Brian B. Ochoa

引用次数: 0

Modeling the Deformation of Shear Thinning Droplets Suspended in a Newtonian Fluid 牛顿流体中剪切减薄液滴的变形建模

IF 1.8 4区工程技术

Applied Rheology Pub Date : 2020-01-01 DOI: 10.1515/arh-2020-0113

Abdulwahab S. Almusallam, Isameldeen E. Daffallah, L. Benyahia

引用次数: 1

Rheology of polysulfone-N-methylpyrrolidone solutions used in the technology of lithium-ion batteries 聚砜- n -甲基吡咯烷酮溶液在锂离子电池技术中的流变性

IF 1.8 4区工程技术

Applied Rheology Pub Date : 2020-01-01 DOI: 10.1515/arh-2020-0109

V. Kulichikhin, A. Malkin, I. V. Gumennyi, V. A. Govorov

引用次数: 1

Modeling of Shear Rheological Behavior of Uncured Rubber Melt 未固化橡胶熔体剪切流变行为的建模

IF 1.8 4区工程技术

Applied Rheology Pub Date : 2020-01-01 DOI: 10.1515/arh-2020-0111

Hengxiao Yang, Qimian Mo, Hengyu Lu, Shixun Zhang, Wei Cao, Changyu Shen

引用次数: 0

The influence of sulfate availability on rheology of fresh cement paste 硫酸盐可用量对鲜水泥浆体流变性的影响

IF 1.8 4区工程技术

Applied Rheology Pub Date : 2020-01-01 DOI: 10.1515/arh-2020-0106

W. Mbasha, R. Haldenwang, I. Masalova

{"title":"The influence of sulfate availability on rheology of fresh cement paste","authors":"W. Mbasha, R. Haldenwang, I. Masalova","doi":"10.1515/arh-2020-0106","DOIUrl":"https://doi.org/10.1515/arh-2020-0106","url":null,"abstract":"Abstract Natural gypsum can degenerate into hemihydrate during cement clinker grinding which changes the physical and chemical properties of cement hydration, affecting therefore the fresh and hardened properties of cement based materials. Cement systems containing a constant total amount of calcium sulfate (4%) with relative proportions of hemihydrate and natural gypsum were considered. Rheological measurements were executed on an Anton Paar MCR51 rheometer to evaluate the flow properties of cement pastes. Results show that, the yield stress and the plastic viscosity of cement pastes were affected when the degeneration of natural gypsum exceeded 50%. Above this concentration, the yield stress remarkably increased and a variation in plastic viscosity of about 50% was observed. Using TG-DSC techniques, it was shown that, the amount of formed ettringite could not explain these rheological changes. However, centrifugational packing and SEM-SE measurements confirmed that, more than the amount of ettringite precipitated, ettringite morphology plays a major role in controlling the yield stress and plastic viscosity of fresh cement pastes.","PeriodicalId":50738,"journal":{"name":"Applied Rheology","volume":"30 1","pages":"54 - 63"},"PeriodicalIF":1.8,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1515/arh-2020-0106","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41715375","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Biopolymer–Surfactant Complexes as Flow Enhancers: Characterization and Performance Evaluation 生物聚合物-表面活性剂配合物作为流动增强剂:表征和性能评价

IF 1.8 4区工程技术

Applied Rheology Pub Date : 2019-03-01 DOI: 10.1515/ARH-2019-0002

W. Mahmood, Wafaa A. Khadum, E. Eman, Hayder A. Abdulbari

{"title":"Biopolymer–Surfactant Complexes as Flow Enhancers: Characterization and Performance Evaluation","authors":"W. Mahmood, Wafaa A. Khadum, E. Eman, Hayder A. Abdulbari","doi":"10.1515/ARH-2019-0002","DOIUrl":"https://doi.org/10.1515/ARH-2019-0002","url":null,"abstract":"Abstract Artificial polymeric additives are known, and experimentally proven, to be effective drag reducing agents in pipelines with turbulent flow medium. The artificial nature of these additives and their low resistance to high shear forces, exerted by the pipeline geometries and equipment, are considered as major problems against a wider implementation in other industrial applications. The present work introduces a new polymer-surfactant complex of two organic additives (chitosan and sodium laurel ether sulfate, SLES) as a drag reducing agent. The rheological and morphological properties of the new complexes were experimentally tested. The new complex’s drag reduction performance and stability against high shear forces were analyzed using rotating disk apparatus. All the investigated solutions and complexes showed a non-Newtonian behavior. The cryo-TEM images showed a unique polymer-surfactant macrocomplex structure with a nonlinear relationship between its rheological properties and surfactant concentration. A maximum flow enhancement of 47.75% was obtained by the complex (chitosan 300 and 400ppmof chitosan and SLES, respectively) at the rotation speed of 3000 rpm. Finally, the stability of the proposed additives was highly modified when the additive complexes were formed.","PeriodicalId":50738,"journal":{"name":"Applied Rheology","volume":"29 1","pages":"12 - 20"},"PeriodicalIF":1.8,"publicationDate":"2019-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1515/ARH-2019-0002","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43565993","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Measurement of Drilling Fluid Rheology and Modeling of Thixotropic Behavior 钻井液流变学测量及触变行为建模

IF 1.8 4区工程技术

Applied Rheology Pub Date : 2019-03-01 DOI: 10.1515/ARH-2019-0001

H. J. Skadsem, A. Leulseged, E. Cayeux

{"title":"Measurement of Drilling Fluid Rheology and Modeling of Thixotropic Behavior","authors":"H. J. Skadsem, A. Leulseged, E. Cayeux","doi":"10.1515/ARH-2019-0001","DOIUrl":"https://doi.org/10.1515/ARH-2019-0001","url":null,"abstract":"Abstract Drilling fluids perform a number of important functions during a drilling operation, including that of lifting drilled cuttings to the surface and balancing formation pressures. Drilling fluids are usually designed to be structured fluids exhibiting shear thinning and yield stress behavior, and most drilling fluids also exhibit thixotropy. Accurate modeling of drilling fluid rheology is necessary for predicting friction pressure losses in the wellbore while circulating, the pump pressure needed to resume circulation after a static period, and how the fluid rheology evolves with time while in static or near-static conditions. Although modeling the flow of thixotropic fluids in realistic geometries is still a formidable future challenge to be solved, considerable insights can still be gained by studying the viscometric flows of such fluids. We report a detailed rheological characterization of a water-based drilling fluid and an invert emulsion oilbased drilling fluid. The micro structure responsible for thixotropy is different in these fluids which results in different thixotropic responses. Measurements are primarily focused at transient responses to step changes in shear rate, but cover also steady state flow curves and stress overshoots during start-up of flow. We analyze the shear rate step change measurements using a structural kinetics thixotropy model.","PeriodicalId":50738,"journal":{"name":"Applied Rheology","volume":"29 1","pages":"1 - 11"},"PeriodicalIF":1.8,"publicationDate":"2019-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1515/ARH-2019-0001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49199243","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 23

Effect of temperature on the fatigue behavior of asphalt binder 温度对沥青粘结剂疲劳性能的影响

IF 1.8 4区工程技术

Applied Rheology Pub Date : 2019-01-01 DOI: 10.1515/arh-2019-0004

A. K. Kuchiishi, João Paulo B. Carvalho, I. Bessa, K. Vasconcelos, L. Bernucci

{"title":"Effect of temperature on the fatigue behavior of asphalt binder","authors":"A. K. Kuchiishi, João Paulo B. Carvalho, I. Bessa, K. Vasconcelos, L. Bernucci","doi":"10.1515/arh-2019-0004","DOIUrl":"https://doi.org/10.1515/arh-2019-0004","url":null,"abstract":"Abstract Asphalt pavement is under different climatic conditions throughout its service life, which means that fatigue cracking does not occur at a specific temperature, but at a temperature range. The main objective of this paper is to evaluate the influence of different temperatures in the fatigue life of two asphalt binders: a non-modified binder (penetration grade 30/45) and a highly polymermodified binder (HPMB). The fatigue resistance characterization was performed by means of a linear amplitude sweep (LAS) test at the temperatures of 10, 15, 20, 25, and 30°C using a dynamic shear rheometer (DSR). From the dynamic shear modulus (|G*|) results, adhesion loss was observed between the binder and the rheometer parallel plate at the lower temperature of 10°C,while at higher temperatures (25 and 30°C) plastic flow was observed rather than fatigue damage. Therefore, considering that the actual test procedure does not specify the testing temperature, the evaluation of failure mechanism is essential to validate test results, because the random selection of test temperature might lead to inconsistent data.","PeriodicalId":50738,"journal":{"name":"Applied Rheology","volume":"29 1","pages":"30 - 40"},"PeriodicalIF":1.8,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1515/arh-2019-0004","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47200733","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6