Shark-Skin Surface for Fluid-Drag Reduction in Turbulent Flow

2016 ◽  
pp. 327-382 ◽  
Author(s):  
Bharat Bhushan
Keyword(s):  
Turbulent Flow ◽  
Drag Reduction ◽  
Skin Surface ◽  
Shark Skin ◽  
Fluid Drag ◽  
Fluid Drag Reduction

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

Shark-skin surfaces for fluid-drag reduction in turbulent flow: a review

2010 ◽  
Vol 368 (1929) ◽  
pp. 4775-4806 ◽  
Author(s):  
Brian Dean ◽  
Bharat Bhushan
Keyword(s):  
Turbulent Flow ◽  
Drag Reduction ◽  
Performance Studies ◽  
Flow Characteristics ◽  
Shark Skin ◽  
Turbulent Flow Regime ◽  
Fluid Drag ◽  
Maximum Drag Reduction ◽  
Manufacturing Techniques ◽  
Fluid Flow Characteristics

The skin of fast-swimming sharks exhibits riblet structures aligned in the direction of flow that are known to reduce skin friction drag in the turbulent-flow regime. Structures have been fabricated for study and application that replicate and improve upon the natural shape of the shark-skin riblets, providing a maximum drag reduction of nearly 10 per cent. Mechanisms of fluid drag in turbulent flow and riblet-drag reduction theories from experiment and simulation are discussed. A review of riblet-performance studies is given, and optimal riblet geometries are defined. A survey of studies experimenting with riblet-topped shark-scale replicas is also given. A method for selecting optimal riblet dimensions based on fluid-flow characteristics is detailed, and current manufacturing techniques are outlined. Due to the presence of small amounts of mucus on the skin of a shark, it is expected that the localized application of hydrophobic materials will alter the flow field around the riblets in some way beneficial to the goals of increased drag reduction.

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
Sign in / Sign up

Export Citation Format

Share Document