A5002068491- Fluid Dynamics and Turbulent Flows
- Heat Transfer Mechanisms
- Surface Modification and Superhydrophobicity
- Aerodynamics and Fluid Dynamics Research
- Adhesion, Friction, and Surface Interactions
- Textile materials and evaluations
- Insect and Arachnid Ecology and Behavior
- Fluid Dynamics and Thin Films
- Aerosol Filtration and Electrostatic Precipitation
- Insect and Pesticide Research
- Particle Dynamics in Fluid Flows
- Bee Products Chemical Analysis
- Tribology and Lubrication Engineering
Northwestern Polytechnical University
2021-2022
Riblets can be potentially employed to passively reduce the turbulent friction drag. However, drag reduction performance of riblets does not currently meet expectations, which could assist in emission and energy conservation green transportation. This study proposes validates a topological form hierarchical nested (HNR) that significantly enhances performance. To explore enhancement mechanism, direct numerical simulations are performed for flow simulation on riblet surface under different...
Abstract Drag reduction is a significant challenge for many industries, such as ships, pipelines, aircraft, energy, and transportation. Multilayer hierarchical microstructures can inhibit the development of vortices near wall, which beneficial to drag reduction. However, existing methods have difficulty performing controlled fabrication complex multilayer microstructure arrays. Here, novel triple lithography method based on three-layer hybrid masks proposed three-dimensional surfaces. The...
Biomimetic riblet surfaces, such as blade, wavy, sinusoidal, and herringbone have widespread applications for drag reduction in the energy, transportation, biomedicine industries. The ability of a blade surface is sensitive to yaw angle, which angle between design direction average flow direction. In practical applications, often misaligned with surfaces different morphologies arrangements. However, previous studies not reported on characteristics regularities related complex...
Riblets inspired by shark skin exhibit a great air drag reduction potential in many industries, such as the aircraft, energy, and transportation industries. Many studies have reported that blade riblets attain highest ability, with current limit of ∼11%. Here, we propose multilayer hierarchical (MLHRs) to further improve ability. MLHRs were fabricated via three-layer hybrid mask lithography method, ability was studied closed channel. The experimental results indicated maximum achieved...
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