Results 71 to 80 of about 4,765,914 (397)

Drag Reduction by Wavy Surfaces

Journal of Fluid Science and Technology, 2011
Recent studies on turbulent friction drag reduction by wavy surfaces are reviewed. Special focus is laid upon numerical studies of fully developed flow in a channel having wavy surfaces.
Koji FUKAGATA
doaj   +1 more source

A Mechanism of Polymer Induced Drag Reduction in Turbulent Pipe [PDF]

, 2014
Polymer induced drag reduction in turbulent pipe flow was investigated using a non-intrusive laser based diagnostic technique, namely Particle Image Velocimetry (PIV).
Markides, CN, Zadrazil, I
core   +1 more source

Turbulent drag reduction by anisotropic permeable substrates – analysis and direct numerical simulations [PDF]

Journal of Fluid Mechanics, 2019
We explore the ability of anisotropic permeable substrates to reduce turbulent skin friction, studying the influence that these substrates have on the overlying turbulence.
Garazi G'omez-de-Segura, Ricardo Garc'ia-Mayoral   +1 more
semanticscholar   +1 more source

Interaction between Molten Al‐Killed Mn–B Steel and Carbon‐Bonded MgO Refractories Based on Recyclates

Advanced Engineering Materials, EarlyView.
High‐temperature interactions between low‐sulfur Al‐killed Mn–B steel and MgO–C refractories (0 and 50 wt% recyclates) are studied via finger immersion tests (1600 °C). Surface‐active elements influence infiltration. MgO/CaS layer forms, along with spinel and calcium silicate.
Matheus Roberto Bellé, Lukas Neubert, Anton Yehorov, Till M. J. Stadtmüller, Christos G. Aneziris, Olena Volkova   +5 more
wiley   +1 more source

Analysis of Drag Reduction Methods and Mechanisms of Turbulent

Applied Bionics and Biomechanics, 2017
Turbulent flow is a difficult issue in fluid dynamics, the rules of which have not been totally revealed up to now. Fluid in turbulent state will result in a greater frictional force, which must consume great energy.
Gu Yunqing, Liu Tao, Mu Jiegang, Shi Zhengzan, Zhou Peijian   +4 more
doaj   +1 more source

Rational Fine‐Tuning of MOF Pore Metrics: Enhanced SO2 Capture and Sensing with Optimal Multi‐Site Interactions

Advanced Functional Materials, EarlyView.
A pore tuning strategy to amplify the multi‐site MOF‐SO2 interactions is proposed to achieve an enhanced trace SO2 capture and chemiresistive sensing in highly stable isostructural DMOFs by annelating benzene rings. This work provides a facile strategy to achieve tailor‐made stable MOF materials for specific multifunctional applications.
Shanghua Xing, Abdulrahman Mohabbat, István Boldog, Jens Möllmer, Marcus Lange, Yulyan Haiduk, Tobias Heinen, Vladimir Pankov, Oliver Weingart, Christoph Janiak   +9 more
wiley   +1 more source

Effects of micro-grooves and fluid viscoelasticity on friction drag reduction in a turbulent boundary layer

Engineering Applications of Computational Fluid Mechanics
To meet the underwater drag reduction needs in engineering applications, one can draw on the drag reduction strategies of marine animals such as sharks, utilizing their surface groove structures and the secretion of viscoelastic drag-reducing mucus to ...
Liqi Guo, Xiaobin Li, Xinfeng Zhai, Han Zhu, Hong-Na Zhang, Feng-Chen Li   +5 more
doaj   +1 more source

Bionic Research on Bird Feather for Drag Reduction

Advances in Mechanical Engineering, 2015
To reduce friction drag with bionic method in a more feasible way, the surface microstructure of bird feather was analyzed attempting to reveal the biologic features responding to skin friction drag reduction.
Beibei Feng, Darong Chen, Jiadao Wang, Xingtuan Yang   +3 more
doaj   +1 more source

2D Multifunctional Spin‐Orbit Coupled Dirac Nodal Line Materials

Advanced Functional Materials, EarlyView.
A total of 473 nonmagnetic and antiferromagnetic 2D spin‐orbit coupled Dirac nodal line materials are screened, spanning 5 layer groups and 12 magnetic space groups. Furthermore, it integrates their topological properties with electride, multiferroic, and magnetic characteristics, revealing unique systems with expanded functionalities and promising ...
Weizhen Meng, Ying Liu, Jialin Gong, Yalong Jiao, Xiaoming Zhang, Wenxian Li, Zhenxiang Cheng, Tie Yang   +7 more
wiley   +1 more source

Superhydrophobic drag reduction in high-speed towing tank

Journal of Fluid Mechanics, 2020
As far as plastron is sustained, superhydrophobic (SHPo) surfaces are expected to reduce skin-friction drag in any flow conditions including large-scale turbulent boundary-layer flows of marine vessels.
Muchen Xu, N. Yu, John Kim, C. Kim
semanticscholar   +1 more source