Formation, stability and comparison of water/oil emulsion using gum arabic and guar gum and effect of aging of polymers on drag reduction percentage in water/oil flow

Vacuum ◽  
2019 ◽  
Vol 159 ◽  
pp. 247-253 ◽  
Author(s):  
Kamaljit Singh Sokhal ◽  
Gangacharyulu Dasaroju ◽  
Vijaya Kumar Bulasara
Keyword(s):  
Drag Reduction ◽  
Guar Gum ◽  
Gum Arabic ◽  
Oil Emulsion ◽  
Oil Flow ◽  
Reduction Percentage

Simulation of Crude Oil Transportation with Drag Reduction Agents Using k-ϵ and k-ω Models

2021 ◽  
Author(s):  
Ali Nasir Khalaf ◽  
Asaad A. Abdullah
Keyword(s):  
Experimental Data ◽  
Drag Reduction ◽  
Crude Oil ◽  
Simulated Data ◽  
Fluid Equation ◽  
Oil Transportation ◽  
Different Types ◽  
Oil Flow ◽  
Simulation Results ◽  
Reduction Percentage

This work explores the possibility of using Newtonian turbulence k−ϵ and k−ω models for modelling crude oil flow in pipelines with drag reduction agents. These models have been applied to predict the friction factor, pressure drop and the drag reduction percentage. The simulation results of both models were compared with six published experimental data for crude oil flow in pipes with different types of drag reduction agents. The velocity near the wall was determined using the log law line of Newtonian fluid equation and by changing the parameter ΔB to achieve an excellent agreement with experimental data. Simulated data for k−ϵ model shows better agreement with most experimental data than the k−ω turbulence model.

Drag Reduction and Velocity Profiles Distribution of Crude Oil Flow in Spiral Pipes

2015 ◽  
Vol 9 (1) ◽  
pp. 1 ◽  
Author(s):  
Yanuar Yanuar ◽  
Kurniawan T. Waskito ◽  
Gunawan Gunawan ◽  
Budiarso Budiarso
Keyword(s):  
Drag Reduction ◽  
Crude Oil ◽  
Velocity Profiles ◽  
Oil Flow

scholarly journals Use of Guar Gum and Gum Arabic as Bread Improvers for the Production of Bakery Products from Sorghum Flour

2007 ◽  
Vol 13 (4) ◽  
pp. 327-331 ◽  
Author(s):  
Abd Elmoneim O. ELKHALIFA ◽  
Ashwag M. MOHAMMED ◽  
Mayada A. MUSTAFA ◽  
Abdullahi H. El TINAY
Keyword(s):  
Guar Gum ◽  
Gum Arabic ◽  
Bakery Products ◽  
Sorghum Flour

Maximum Drag Reduction Asymptote of Polymeric Fluid Flow in Coiled Tubing

2008 ◽  
Vol 131 (1) ◽  
Author(s):  
Subhash N. Shah ◽  
Yunxu Zhou
Keyword(s):  
Drag Reduction ◽  
Oil And Gas ◽  
Guar Gum ◽  
Oil And Gas Industry ◽  
Flow Loop ◽  
Polymeric Fluids ◽  
Curvature Ratio ◽  
Coiled Tubing ◽  
Industry Applications ◽  
Maximum Drag Reduction

This study experimentally investigates the drag reduction characteristics of the most commonly used polymer fluids in coiled tubing applications. The flow loop employed consists of 12.7mm straight and coiled tubing sections. The curvature ratio (a∕R, where a and R are the radii of the tubing and the reel drum, respectively) investigated is from 0.01 to 0.076, which covers the typical curvature ratio range encountered in the oil and gas industry applications. Fluids tested include xanthan gum, guar gum, and hydroxypropyl guar at various polymer concentrations. It is found that the drag reduction in coiled tubing is significantly lower than that in straight tubing, probably due to the effect of secondary flow in curved geometry. The onset of drag reduction is also found to be delayed as the curvature ratio was increased. A correlation for the maximum drag reduction (MDR) asymptote in coiled tubing is developed. When the curvature ratio is set to zero, the new correlation reduces to the well-known Virk’s MDR asymptote for dilute polymer solutions in straight pipes. A new drag reduction envelope is proposed for the analysis of drag reduction behavior of polymeric fluids in coiled tubing. Application of the new drag reduction envelope is also discussed.

Effect of starch-hydrocolloid complexes through heat-moisture treatment on in vivo digestibility

2021 ◽  
Author(s):  
Jie Yang ◽  
Shuai Zhou ◽  
Zhengbiao Gu ◽  
Li Cheng ◽  
Chun Cui ◽  
...  
Keyword(s):  
Xanthan Gum ◽  
Guar Gum ◽  
Gum Arabic ◽  
Heat Moisture Treatment ◽  
Moisture Treatment

The purpose of this study was to investigate the effect of starch-hydrocolloid (Gum Arabic, Xanthan Gum, and Guar Gum) complexes by heat-moisture treatment (HMT) on in vivo digestibility. In vivo...

scholarly journals Rheological Characteristics of Soluble Fibres during Chemically Simulated Digestion and their Suitability for Gastroparesis Patients

Nutrients ◽  
2020 ◽  
Vol 12 (8) ◽  
pp. 2479
Author(s):  
Harsha Suresh ◽  
Vincent Ho ◽  
Jerry Zhou
Keyword(s):  
Gastric Motility ◽  
Guar Gum ◽  
Relative Viscosity ◽  
Gum Arabic ◽  
Potential Candidate ◽  
Beta Glucan ◽  
Motility Disorders ◽  
Simulated Digestion ◽  
Balanced Diet ◽  
Low Viscosity

Dietary fibres are an integral part of a balanced diet. Consumption of a high-fibre diet confers many physiological and metabolic benefits. However, fibre is generally avoided by individuals with gastrointestinal motility disorders like gastroparesis due to increased likelihood of exacerbated symptoms. Low-viscosity soluble fibres have been identified as a possible source of fibre tolerable for these individuals. The aim of this study is to determine the rheological properties of 10 common commercially available soluble fibres in chemically simulated digestive conditions and evaluate their suitability for individuals with mild to moderate gastroparesis, a gastric motility disorder. Rheological testing under neutral condition (distilled water pH 7) and chemically simulated gastric digestion were evaluated to determine the yield point and relative viscosity of each fibre. Our results reveal two rheological categories of soluble fibres; pseudoplastic and dilatant. Simulated digestion was shown to significantly alter the yield-points of psyllium husk, iota-carrageenan, beta-glucan, apple-fibre pectin, and inulin. Gum Arabic and partially hydrolysed guar gum showed the lowest viscosities and were not affected under simulated digestion, characteristics that make them potential candidate fibres for patients with gastroparesis. Altogether, our results demonstrate that digestion can have a significant impact on fibre viscosity and should be taken into consideration when evaluating the suitability of fibres for patients with gastric motility disorders.

scholarly journals Effect of wettability of ceramic proppant surface in guar gum solution on the oil flow efficiency in fractures

Petroleum ◽  
2019 ◽  
Vol 5 (4) ◽  
pp. 388-396 ◽  
Author(s):  
Kanjicai Dong ◽  
Ming Wang ◽  
Chi Zhang
Keyword(s):  
Guar Gum ◽  
Oil Flow

Rheological and Hydraulic Properties of Drilling, Completion, and Stimulation Fluids in Straight and Coiled Tubings

2002 ◽  
Author(s):  
Y. Zhou ◽  
S. N. Shah
Keyword(s):  
Drag Reduction ◽  
Guar Gum ◽  
Polymer Concentration ◽  
Hydroxyethyl Cellulose ◽  
Test Facility ◽  
Drilling Mud ◽  
Polymeric Fluids ◽  
Pressure Losses ◽  
Coiled Tubing ◽  
Friction Pressure

The rheological properties and friction pressure losses of several fluids that are most commonly used as well drilling, completion, and stimulation fluids have been investigated experimentally. These fluids include polymeric fluids – Xanthan gum, partially hydrolyzed polyacrylamide (PHPA), guar gum, and hydroxyethyl cellulose (HEC), bentonite drilling mud, oil-based drilling mud, and guar-based fracturing slurries. Rheological measurements using a Bohlin CS 50 rheometer and a model 35 Fann viscometer showed that these fluids exhibit shear thinning and thermal thinning behavior except the bentonite drilling mud whose viscosity increased as the temperature was raised. Flow experiments using a full-scale coiled tubing test facility showed that the friction pressure loss in coiled tubing is significantly higher than in straight tubing. Since the polymeric fluids displayed drag reducing property, their drag reduction behavior in straight and coiled tubings was analyzed and compared. It was found that the drag reduction (DR) in coiled tubing is much lower than that in straight tubing. Plots of drag reduction vs. generalized Reynolds number indicate that the drag reduction in coiled tubing was not affected by polymer concentration as much as in straight tubing. The onsets of turbulence and drag reduction in coiled tubing were significantly delayed as compared with straight tubing. The effect of solids content on the friction pressure losses in coiled tubing is also briefly discussed.

Study on Natural Gas Drag Reduction Agent and Mechanism of Gas Pipelines Drag Reduction

2008 ◽  
Author(s):  
Guoping Li ◽  
Zhiheng Zhang ◽  
Bing Liu ◽  
Chunman Li ◽  
Weichun Chang ◽  
...  
Keyword(s):  
Natural Gas ◽  
Drag Reduction ◽  
Reduction Method ◽  
Radial Pulsation ◽  
Gas Pipelines ◽  
Oil Pipelines ◽  
Oil Flow ◽  
Pipeline Wall ◽  
Gas Drag ◽  
Long Chain

On the basis of the study on the principle of oil flow and that on mechanism of drag reduction and transportation promotion of oil pipelines, the article makes a further research on the Mechanism of Drag Reduction in the gas pipelines. It points out that the basic cause for gas pipelines drag reduction is to control effectively the radial pulsation of gas adjacent to pipeline wall. It is considered that the most effective drag reduction method is to reduce the pipeline wall’s roughness degree and pipeline wall’s undercoat and to make gas drag reduction agent adjacent to pipeline wall. The research shows that gas drag reduction agent should be a polymer and compound with polarity and nonpolarity long chain.

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