scholarly journals Rheological properties of wet foams generated from viscous pseudoplastic fluids

2020 ◽  
Vol 64 ◽  
pp. 102304 ◽  
Author(s):  
Saifullah Jabarkhyl ◽  
Mostafa Barigou ◽  
Mandar Badve ◽  
Shiping Zhu
Keyword(s):  
Rheological Properties ◽  
Pseudoplastic Fluids

Effect of Rheological Properties of Yield Pseudoplastic Fluids on Slugs Characteristics in an Upward Vertical Pipe: Experiments and Modeling

2020 ◽  
Author(s):  
Abdalsalam Ihmoudah ◽  
Mohamed M. Awad ◽  
Mohammad Azizur Rahman ◽  
Stephen D. Butt
Keyword(s):  
Liquid Phase ◽  
Rheological Properties ◽  
Numerical Investigation ◽  
Two Phase Flow ◽  
Immiscible Fluids ◽  
Newtonian Fluids ◽  
Phase Flow ◽  
Vertical Pipe ◽  
Two Phase ◽  
Pseudoplastic Fluids

Abstract Two-phase flow of gas/yield Pseudoplastic fluids can be found in different industrial applications like the chemical processes, oil industry, and petroleum transport in pipelines. In this study, experimental and numerical investigation of the influence of Rheological properties of non-Newtonians fluids in two-phase flow (gas/yield Pseudoplastic fluids) on slug characteristics in an upward vertical flow were performed. Different concentrations of Xanthan gum solutions (0.05%, 0.10%, and 0.15%, by w/w), which are referred to as non-Newtonian, yield Pseudoplastic behavior used as the working liquids and air as a gas. The experiments were conducted in an open-loop re-circulating system has a total length of 65 m to ensure phase mixing, and authorize flow regime patterns to develop. The vertical pipe has a diameter of 76.3 mm. API-compliant 8-speed rotational viscometer model 800 was used to measure the rheological properties of non-Newtonian fluids. Flow visualization and recording videos were achieved by A high-speed camera to a comparison between behavior of Newtonian and non-Newtonian fluids in the two-phase model. Pressure transducers used to measure high-response pressure. Computational fluid dynamics software (ANSYS fluent 2019 R3) was used for the numerical investigation. The volume of fluid (VOF) model has been chosen for tracking immiscible fluids. CFD simulation results compared to the experimental data. The slug behavior and shape were noticed to be affected by changing the rheological properties of the liquid phase. with increasing XG concentration at the same operations conditions, we found that non-uniform and random distribution of small bubbles due to the effective viscous force of a liquid phase.

scholarly journals Comparative study of the physicochemical properties of a vegan dressing-type mayonnaise and traditional commercial mayonnaise

2022 ◽  
Vol 72 (4) ◽  
pp. e439
Author(s):  
D.A. Cerro ◽  
A.P. Maldonado ◽  
S.B Matiacevich
Keyword(s):  
Physicochemical Properties ◽  
Oxidative Stability ◽  
Rheological Properties ◽  
Food Industry ◽  
Color Difference ◽  
Unsaturated Fat ◽  
Ft Ir ◽  
Pseudoplastic Fluids ◽  
New Consumer ◽  
Measured Water

The food industry has developed a vegan dressing-type mayonnaise due to new consumer demands. The aim of this study was to compare three commercial mayonnaise types with a vegan dressing, measuring their physicochemical properties. Four dressing samples were analyzed: vegan, homemade recipe, creamy, and light. The following properties were measured: water activity, color, droplet size, rheological properties, structural analysis, and oxidative stability. A high color difference was observed between vegan and the other samples due to the presence of chickpea protein. The size and distribution of droplets of the vegan sample were greater than the others. The rheological properties indicated that all samples are non-Newtonian pseudoplastic fluids. The FT-IR results indicated that the highest peak for vegan corresponded to its content in mono-unsaturated fat. Therefore, it showed the lowest oxidative stability. In conclusion, the mayonaise formulations were affected by physicochemical properties such as the content and composition of the oil, thickener and protein contents, along with processing technology.

Rheological Properties of Sodium Metatungstate in Aqueous Solutions

2014 ◽  
Vol 960-961 ◽  
pp. 249-253
Author(s):  
Jian Gang Ku ◽  
Kui He ◽  
Hui Huang Chen ◽  
Wen Yuan Liu
Keyword(s):  
Rheological Properties ◽  
Apparent Viscosity ◽  
Theoretical Basis ◽  
Flow Simulation ◽  
Density Fractionation ◽  
Flow Curves ◽  
Fixed Temperature ◽  
Effects Of Temperature ◽  
Increasing Temperature ◽  
Pseudoplastic Fluids

Sodium metatungstate (SMT) solution is an inorganic heavy liquid which is widely used in density fractionation. However, rheological properties of aqueous SMT solutions have never been fully researched. The objective of the present work was to study the rheological properties of aqueous SMT solutions and effects of temperature and density on the apparent viscosity. The steady flow experimental data was fitted using Herschel-Bulkley model. The results show that aqueous SMT solutions of different density are pseudoplastic fluids and the flow curves of SMT solutions were described by the Hershel-Bulkley equation. The apparent viscosity decreases monotonically with increasing temperature under the same density and increases exponentially with increasing density at the fixed temperature. Rheological properties of aqueous SMT solutions can be applied in the calculation of density fractionation efficiency and provides a theoretical basis for flow simulation.

Experimental Investigations on the Effect of Mixing Procedures on the Rheological Properties of Oilwell Cement Slurries

2021 ◽  
pp. 1-12
Author(s):  
Fatemeh K. Saleh ◽  
Catalin Teodoriu
Keyword(s):  
Rheological Properties ◽  
Oil And Gas ◽  
Mixing Time ◽  
Oil And Gas Industry ◽  
Experimental Investigations ◽  
Mixing Conditions ◽  
Cement Slurry ◽  
Gas Industry ◽  
Mixing Energy ◽  
Pseudoplastic Fluids

Abstract Well cementing is an essential operation in the oil and gas industry, and it is a key material to ensure wellbore integrity through the life of the well. Improper cement design can trigger well construction risks such as de-bonding and leakage pathways near-wellbore and through the annulus. Mixing non-newtonian fluids is one of the most challenging tasks, especially for pseudoplastic fluids exhibiting yield stress, such as wellbore cement slurry. Mixing conditions for cement slurries and their effect on rheological properties and thickening time has been debated through the literature. In this study, based on laboratory-scale experiments, we provide testing results for rheological properties and thickening time by changing mixing conditions. Our results show that slurries mixed under similar mixing energy do not necessarily result in similar rheological properties. Comparing rheological measurements from lower mixing energy to higher mixing energy, plastic viscosity decreases; however, yield point increases. This implies the dual opposite effect of mixing time on rheological properties. This may have severe implications for field operations where mixing must be improved to enable successful cement operation.

Using the alveograph in developing requirements for the quality of flour for wafer sheet production

2020 ◽  
Vol 29 (12) ◽  
pp. 52-58
Author(s):  
E.P. Meleshkina ◽  
◽  
S.N. Kolomiets ◽  
A.S. Cheskidova ◽  
◽  
...  
Keyword(s):  
Rheological Properties ◽  
Quality Indicators ◽  
Wheat Flour ◽  
Mathematical Statistics ◽  
Intended Purpose ◽  
The Future ◽  
Relationship Of ◽  
The Relationship

Objectively and reliably determined indicators of rheological properties of the dough were identified using the alveograph device to create a system of classifications of wheat and flour from it for the intended purpose in the future. The analysis of the relationship of standardized quality indicators, as well as newly developed indicators for identifying them, differentiating the quality of wheat flour for the intended purpose, i.e. for finished products. To do this, we use mathematical statistics methods.

THE INFLUENCE OF SELECTED POLYMERS ON THE RHEOLOGICAL PROPERTIES OF HYDROGELS WITH CHITOSAN APPLIED ON THE SKIN

2017 ◽  
Vol XXII ◽  
pp. 201-206 ◽  
Author(s):  
Maria Szcześniak ◽  
◽  
Bożena Grimling ◽  
Jan Meler ◽  
Bożena Karolewicz
Keyword(s):  
Rheological Properties

THE RHEOLOGICAL PROPERTIES OF BLOOD UNDER BASAL CELL SKIN CANCER IN THE IMMEDIATE POSTOPERATIVE PERIOD

2016 ◽  
Vol 26 (3) ◽  
pp. 370-380
Author(s):  
Vladimir V. Maslyakov ◽  
◽  
Olga I. Dralina ◽  
Yuliya B. Vlasenko ◽  
Larisa M. Kim
Keyword(s):  
Skin Cancer ◽  
Rheological Properties ◽  
Basal Cell ◽  
Postoperative Period

Connections between glutenin proteins and rheological properties of winter wheat

2006 ◽  
Vol 34 (1) ◽  
pp. 693-696 ◽  
Author(s):  
Árpád Tóth ◽  
Péter Sipos ◽  
Mária Borbély ◽  
Csilla Uri ◽  
Ágnes Elek ◽  
...  
Keyword(s):  
Winter Wheat ◽  
Rheological Properties
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