scholarly journals Enhancing the Drag Reduction Phenomenon within a Rotating Disk Apparatus Using Polymer-Surfactant Additives

2016 ◽  
Vol 6 (12) ◽  
pp. 355 ◽  
Author(s):  
Musaab Rashed ◽  
Mohamad Mohd Salleh ◽  
Hayder Abdulbari ◽  
Mohd Ismail
Keyword(s):  
Drag Reduction ◽  
Rotating Disk ◽  
Polymer Surfactant

Investigating the Degradation Resistance Improvement of Polymer Surfactant Complex Drag Reducing Agent

2015 ◽  
Vol 789-790 ◽  
pp. 7-14 ◽  
Author(s):  
Hayder A. Abdulbari ◽  
Esmail A.M. Basheer ◽  
Ainoon Shabrin ◽  
Wafaa Kamil Mahmood
Keyword(s):  
Drag Reduction ◽  
Polymer System ◽  
Rotating Disk ◽  
Sodium Polystyrene Sulfonate ◽  
Surfactant Complex ◽  
Turbulent Drag ◽  
Tiny Amount ◽  
Polymer Drag Reduction ◽  
Torque Values ◽  
Polymer Surfactant

Polymers-Surfactant complex efficacy in reducing the drag is of an interest subject in drag reduction research. Turbulent drag reduction (DR) efficiency of Sodium Polystyrene Sulfonate (NaPSS) sodium Alkylbenzene sulfonate complex was studied in a rotating disk apparatus. The solution complex was prepared by varying the concentration of the polymer between 100 to 1200 ppm and the surfactant between 100 to 700ppm. Measurement of torque values were recorded for each sample. The NaPSS (Sodium Polystyrene Sulfante) was found to have an ability to reduce the drag in the turbulent flow. A significant improvement was recorded for the addition of tiny amount of surfactant to the polymer system compare to the pure polymer drag reduction. At high surfactant concentration, it was found that the polymer drag ability decrease. The polymer was degraded when it is subjected to a high shear stress. The degredation resistance was increased by the addation of the surfactant to the polymer solution at concentration range of 100ppm to 400ppm of surfactant.

scholarly journals Enhanced Drag Reduction Performance of Nanocomposites: The Effects of Surface Modification of Nano Silica

2017 ◽  
Vol 26 (4) ◽  
pp. 096369351702600 ◽  
Author(s):  
Xiaodong Dai ◽  
Guicai Zhang ◽  
Bing Li ◽  
Jijiang Ge ◽  
Xuewu Wang ◽  
...  
Keyword(s):  
Surface Modification ◽  
Drag Reduction ◽  
Rotating Disk ◽  
Shear Resistance ◽  
Test Results ◽  
Nano Silica ◽  
Surface Hydroxyl ◽  
Adsorption Analysis ◽  
Oil Adsorption ◽  
Loop 2

In this paper, nanocomposite was synthesized with nano silica and poly-α-olefin, and the effects of surface modification to the nano silica on its drag reduction performance were investigated. The dosage coupling agent, Y-aminopropyltriethoxysilane, and the modification temperature were studied intensively through surface hydroxyl and oil adsorption analysis. The test results indicated that the hydroxyl number of the silica was decreased by Y-aminopropyltriethoxysilane modification, with improved lipophilicity and oil adsorption. At 50°C, the optimum Y-aminopropyltriethoxysilane dosages were 15% for Nano-Si-10, 5% for Nano-Si-20, and 10% for Degussa-R972. The modification significantly changed the nano silica surface properties and enhanced the interaction with poly-α-olefin. Through drag reduction and shear resistance tests by rotating disk 40 mins degradation and testing loop 2 times shearing, it was shown that the nanocomposite possessed good drag reduction and excellent shear resistance properties.

The drag reduction and degradation characteristics of poly α olefin in diesel via rotating disk apparatus

2018 ◽  
Vol 36 (13) ◽  
pp. 981-986
Author(s):  
Xiaodong Dai ◽  
Lei Li ◽  
Shuming Yin ◽  
Guicai Zhang ◽  
Jijiang Ge
Keyword(s):  
Drag Reduction ◽  
Rotating Disk

scholarly journals Effect of SDBS on the drag reduction characteristics of polyacrylamide in a rotating disk apparatus

2015 ◽  
Vol 4 (3) ◽  
pp. 326 ◽  
Author(s):  
Hayder A. Abdul Bari ◽  
Zainab Yousif ◽  
Zulkefli Bin Yaacob ◽  
Edward Oluwasogaakindoyo
Keyword(s):  
Drag Reduction ◽  
Rotating Disk ◽  
Reynolds Numbers ◽  
Aggregate Structure ◽  
Surfactant Micelle ◽  
Micro Particles ◽  
Transmission Electron ◽  
Speed Up ◽  
Reduction Characteristics

<p>This paper focuses on the determination of the interaction between polymer (Polyacrylamide (PAM)) and surfactant (Sodium dod benzene sulfonate (SDBS)) as a drag reducer using Rotating Disk apparatus (RDA) at various concentrations (500, 700, 1000, 1500 and 2000) ppm individually and in the combined form under turbulent conditions at different rotation speed up to 3000 rpm, as well as studying their mechanisms as a drag reducer. The results show that the maximum percent drag reduction increases to (40, 41, 43, 45 and 48)% by using the combined additives of surfactant and polymer at the above concentrations respectively, with slower degradation and display drag reduction for a larger range of Reynolds numbers. The nano and micro particles formed from the combined PAA and SDBSA was studied using cryo-transmission electron microscopy (cryo-TEM) techniques. The images show the surrounding of polymer chain to the surfactant micelle to form an aggregate structure. A hexagonal crystalline form was suggested to describe the shape of the aggregate structure.</p>

scholarly journals Biopolymer–Surfactant Complexes as Flow Enhancers: Characterization and Performance Evaluation

2019 ◽  
Vol 29 (1) ◽  
pp. 12-20 ◽  
Author(s):  
Wafaa K. Mahmood ◽  
Wafaa A. Khadum ◽  
E. Eman ◽  
Hayder A. Abdulbari
Keyword(s):  
Maximum Flow ◽  
Rotating Disk ◽  
Industrial Applications ◽  
Morphological Properties ◽  
High Shear ◽  
Organic Additives ◽  
Shear Forces ◽  
And Performance ◽  
Artificial Nature ◽  
Polymer Surfactant

AbstractArtificial 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.

Effect of polymer–surfactant interaction on its turbulent drag reduction

2011 ◽  
Vol 391 (1-3) ◽  
pp. 125-129 ◽  
Author(s):  
Jung Tae Kim ◽  
Chul Am Kim ◽  
Ke Zhang ◽  
Chun Hag Jang ◽  
Hyoung Jin Choi
Keyword(s):  
Drag Reduction ◽  
Turbulent Drag Reduction ◽  
Turbulent Drag ◽  
Polymer Surfactant

Drag reduction of a rotating disk with many fine grooves

2004 ◽  
Vol 2004.10 (0) ◽  
pp. 311-312
Author(s):  
Keizo WATANABE ◽  
Budiarso ◽  
Satoshi OGATA ◽  
Keigo UEMURA
Keyword(s):  
Drag Reduction ◽  
Rotating Disk

A high-precision rotating disk apparatus for drag reduction characterization

2000 ◽  
Vol 20 (1) ◽  
pp. 43-48 ◽  
Author(s):  
C.A Kim ◽  
D.S Jo ◽  
H.J Choi ◽  
C.B Kim ◽  
M.S Jhon
Keyword(s):  
Drag Reduction ◽  
High Precision ◽  
Rotating Disk
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