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

Bari, Hayder A. Abdul; Yousif, Zainab; Yaacob, Zuriani; Oluwasogaakindoyo, Edward

doi:10.14419/ijbas.v4i3.4883

Cited by 5 publications

(2 citation statements)

References 18 publications

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“…Their values were tabulated in Tables S1-S9, which are available online at www.mdpi.com/2076-3417/6/11/355/s1. Figure 6 shows the complete interaction as a result of TEM, where the aggregate is formed by the surrounding polymer chain (small disc) to the threadlike micelles of the surfactant (large disc) Similar observations were made in [40], while working with a complex mixture of polyacrylamide (PAM) and sodium dodecyl benzene sulfonate (SDBS) in an RDA. In addition, the complex mixture formed from the combination of any two or more additives performs better than the individual parties.…”

Section: Resultssupporting

confidence: 57%

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

et al. 2016

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Pipelines and tubes play important roles in transporting economic liquids, such as water, petroleum derivatives, and crude oil. However, turbulence reduces the initial flow rate at which liquids are pumped, thereby making liquid transportation through pipelines inefficient. This study focuses on enhancing the drag reduction (DR) phenomenon within a rotating disk apparatus (RDA) using polymer-surfactant additives. The complex mixture of polyisobutylene (PIB) and sodium dioctyl sulfosuccinate (SDS) was used. These materials were tested individually and as a complex mixture in RDA at various concentrations and rotational speeds (rpm). The morphology of this complex was investigated using transmission electronic microscopy (TEM). The reduction of the degradation level caused by the continuous circulation of surfactant additives in RDA could improve the long-term DR level. Experimental result shows that the maximum %DR of the complex mixture was 21.455% at 3000 rpm, while the PIB and SDS were 19.197% and 8.03%, respectively. Therefore, the complex mixture had better performance than these substances alone and were highly dependent on the alkyl chain of the surfactant.

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Section: Resultssupporting

confidence: 57%

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

et al. 2016

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“…Bari et al studied the compressive index distribution area and airflow movement range of the airfoil at 60,000 hours. Finally, the airfoil was used to make a carbon fiber rotor with a diameter of 20 cm and a weight of 16 grams [7]. e hovering state was completed and the force was applied, and the architecture stability experiment was conducted.…”

Section: Introductionmentioning

confidence: 99%

Aerodynamic and Vibration Characteristics of the Micro-Octocopter at Low Reynolds Number

Zou

Ling

Zhai

2021

Mobile Information Systems

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With the development of flight technology, the need for stable aerodynamic and vibration performance of the aircraft in the civil and military fields has gradually increased. In this case, the requirements for aerodynamic and vibration characteristics of the aircraft have also been strengthened. The existing four-rotor aircraft carries limited airborne equipment and payload, while the current eight-rotor aircraft adopts a plane layout. The size of the propeller is generally fixed, including the load capacity. The upper and lower tower layout analyzed in this paper can effectively solve the problems of insufficient four-axis load and unstable aerodynamic and vibration performance of the existing eight-axis aircraft. This paper takes the miniature octorotor as the research object and studies the aerodynamic characteristics of the miniature octorotor at different low Reynolds numbers, different air pressures and thicknesses, and the lift coefficient and lift-to-drag ratio, as well as the vibration under different elastic moduli and air pressure characteristics. The research algorithm adopted in this paper is the numerical method of fluid-solid cohesion and the control equation of flow field analysis. The research results show that, with the increase in the Reynolds number within a certain range, the aerodynamic characteristics of the miniature octorotor gradually become better. When the elastic modulus is 2.5 E, the aircraft’s specific performance is that the lift increases, the critical angle of attack increases, the drag decreases, the lift-to-drag ratio increases significantly, and the angle of attack decreases. However, the transition position of the flow around the airfoil surface is getting closer to the leading edge, and its state is more likely to transition from laminar flow to turbulent flow. When the unidirectional carbon fiber-reinforced thickness is 0.2 mm and the thin arc-shaped airfoil with the convex structure has a uniform thickness of 2.5% and a uniform curvature of 4.5%, the aerodynamic and vibration characteristics of the octorotor aircraft are most beneficial to flight.

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Applications of Nanoparticles in Energy and the Environment: Enhanced Oil Upgrading and Recovery and Cleaning up Energy Effluents

Contreras-Mateus

Hethnawi

Mheibesh

et al. 2022

ACS Symposium Series

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

Cited by 5 publications

References 18 publications

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

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

Aerodynamic and Vibration Characteristics of the Micro-Octocopter at Low Reynolds Number

Applications of Nanoparticles in Energy and the Environment: Enhanced Oil Upgrading and Recovery and Cleaning up Energy Effluents

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