Fluid Drag Reduction by Magnetic Confinement

Langmuir ◽  
2022 ◽  
Author(s):  
Arvind Arun Dev ◽  
Peter Dunne ◽  
Thomas M. Hermans ◽  
Bernard Doudin
Keyword(s):  
Drag Reduction ◽  
Magnetic Confinement ◽  
Fluid Drag ◽  
Fluid Drag Reduction

Smart Fluid Drag Reduction Technology Research for HDD

ICPTT 2013 ◽  
2013 ◽  
Author(s):  
Huan Xia ◽  
Xi Wang ◽  
Dingjun Liu ◽  
Ruyi Jiao ◽  
Baochen Liu ◽  
...  
Keyword(s):  
Drag Reduction ◽  
Technology Research ◽  
Fluid Drag ◽  
Fluid Drag Reduction

Preparation and fluid drag reduction properties of superhydrophobic paper-based films comprising carbon nanotubes and fluoropolymers

2017 ◽  
Vol 24 (2) ◽  
pp. 177-184 ◽  
Author(s):  
Weiwei Ma ◽  
Zhiping Zhou ◽  
Ping Li
Keyword(s):  
Carbon Nanotubes ◽  
Drag Reduction ◽  
Composite Films ◽  
Chemical Vapor ◽  
Synthesis Process ◽  
Chemical Vapor Deposition Method ◽  
Fluid Drag ◽  
Acrylate Polymers ◽  
Superhydrophobic Paper ◽  
Fluid Drag Reduction

AbstractCarbon nanotubes (CNTs) were successfully prepared using chemical vapor deposition method on nickel-coated silicon substrates. The CNTs were then modified to obtain functionalized ends. Afterward, acrylate polymers were successfully grafted on the surface of CNTs by atom transfer radical polymerization method. The synthesis process was optimized by studying the surface properties of the composite films. It revealed the existence of chemical bonding between CNTs and polymers. The introduction of CNTs into polymers could improve the water resistance of films. Micro/nano and papillary structures similar to that of lotus leaf were obtained when the polymer matrix was partly etched. The excellent fluid drag reduction performances of film surfaces were expected to be applied in microfluid devices and packaging field.

scholarly journals Analysis of Shark Skin Riblet Surfaces for Fluid Drag Reduction in Turbulent Flow Regime

2019 ◽  
Vol 9 (1S4) ◽  
pp. 666-668
Keyword(s):  
Fluid Flow ◽  
Flow Field ◽  
Turbulent Flow ◽  
Drag Reduction ◽  
Flow System ◽  
Shark Skin ◽  
Structured Surfaces ◽  
Turbulent Flow Regime ◽  
Fluid Drag ◽  
Fluid Drag Reduction

: The integument of fast swimming shark exhibits riblet inspired micro- structured surfaces oriented in the path of flow that will help to make lesser the wall drag in the tempestuous-flow system (turbulent flow). Design have been made for study and utilization, that has been recreate and refine as same as of the shark-skin riblets, presuming an extreme drag depletion of nearly 10% (percent). Mechanism of fluid drag in tempestuous flow and riblet drag depletion theories from experiments and simulations are examined. An examination of riblet intrepratation are discussed and the stellar riblet sizes are defined. An assessment of studies experimenting with riblets-topped shark scale replicas is also discussed. A method for preferring stellar riblet dimensions based on fluid-flow attributes is briefed and current manufacturing approaches are summarized. Due to the existence of little amounts of mucus/booger membranes on the integument of the shark, it is presumed that the constrained application of aqua phobic materials will recast the flow field around the riblets in some way favorable to the goals of augmented drag depletion

Experiment on Deformation Process of Magnetic Fluid Coated Inside Orthogonal Ducting

2012 ◽  
Vol 482-484 ◽  
pp. 1955-1958
Author(s):  
Hai Rong Cui ◽  
Chao Zhen Yang ◽  
Ming Li Sun
Keyword(s):  
Drag Reduction ◽  
Magnetic Fluid ◽  
Deformation Process ◽  
Boundary Surface ◽  
Fluid Drag ◽  
Coated Layer ◽  
The Moment ◽  
Fluid Drag Reduction

Magnetic fluid drag reduction which is based on the character of magnetic fluid by adhered magnetic fluid inside to the boundary surface of duct for fluctuating in synchronism with current flowing in order to make stiffness boundary surface replaced flexible boundary surface is introduced. The deformation process and flowing state of magnetic fluid coating is discussed and analysed. It is found that due to reflux in it, magnetic fluid could reduce drag only at the moment that the reflux volume of magnetic fluid is equal to the flowing volume of magnetic fluid while the thickness of magnetic fluid coated layer is appropriate.

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