A review on slip boundary conditions at the nanoscale: recent development and applications

• Ruifei Wang,
• Jin Chai,
• Bobo Luo,
• Xiong Liu,
• Jianting Zhang,
• Min Wu,
• Mingdan Wei and
• Zhuanyue Ma

Beilstein J. Nanotechnol. 2021, 12, 1237–1251, doi:10.3762/bjnano.12.91

• applied to solve problems associated with macroscopic flows [2][3][4][5]. However, in the field of fluid transport at the micro-/nanoscale, the problem is not that simple and a possible deviation from the classical hypothesis may take place, resulting in liquid slippage at solid surfaces [6][7][8][9]. In

• instance, with external perturbations) in spite of the critical importance they may have on nanoscale fluid transport behavior. Zhang et al. found that the negative slip length exists due to the superhydrophilic nature of the solid wall and also investigated the variation of the negative slip length with

An investigation on the drag reduction performance of bioinspired pipeline surfaces with transverse microgrooves

• Weili Liu,
• Hongjian Ni,
• Peng Wang and
• Yi Zhou

Beilstein J. Nanotechnol. 2020, 11, 24–40, doi:10.3762/bjnano.11.3

• Chemical and Petroleum Engineering, University of Calgary, Calgary T2N1N4, Canada 10.3762/bjnano.11.3 Abstract A novel surface morphology for pipelines using transverse microgrooves was proposed in order to reduce the pressure loss of fluid transport. Numerical simulation and experimental research efforts

• utilization of bionic theory to reduce the pressure loss of fluid transport is feasible. These results can provide theoretical guidance to save energy in pipeline transportations. Keywords: bionic pipeline; drag reduction; drag reduction mechanism; fluid transport; transverse micro-grooves; Introduction

• locomotion [13][22]. Thus, the triangular grooves seen in the nonsmooth structure of animal surfaces have become an effective means to reduce the viscous drag associated with fluid flow. Given the urgent demand to decrease pressure loss in fluid transport and the practicability of bionic theory, the grooved

Biological and biomimetic surfaces: adhesion, friction and wetting phenomena

• Stanislav N. Gorb,
• Kerstin Koch and
• Lars Heepe

Beilstein J. Nanotechnol. 2019, 10, 481–482, doi:10.3762/bjnano.10.48

• Keywords: adhesion; air retention; contact mechanics; fluid transport; friction; functional gradients; wetting; This Thematic Series is the continuation of the previous series on the broad topic of biological and bioinspired materials and surfaces [1][2][3]. This collection of articles displays a current

Biomimetic surface structures in steel fabricated with femtosecond laser pulses: influence of laser rescanning on morphology and wettability

• Camilo Florian Baron,
• Alexandros Mimidis,
• Daniel Puerto,
• Evangelos Skoulas,
• Emmanuel Stratakis,
• Javier Solis and
• Jan Siegel

Beilstein J. Nanotechnol. 2018, 9, 2802–2812, doi:10.3762/bjnano.9.262

• surface morphology. We present experimental results of complex self-organized structures produced in commercial steel that resemble the morphology of the skin of certain reptiles and insects, which are of great interest due to their exceptional fluid transport and friction reduction properties. Surface

• self-organization experiments in steel exploiting spike structure formation upon a single laser scan have been reported in [23], showing good performance for fluid transport applications but less similarity in morphology to the bug cuticle. The results obtained at = 0.2 J/cm2 are shown in Figure 2B

• micrometers (which leads to directionality) can effectively produce preferential fluid transport. Moreover, the results shown in Figure 2B suggest that the cone size can be conveniently adjusted by a proper choice of the number of scans. At higher fluence ( = 0.5 J/cm2), the morphologies obtained are

Superhydrophobic surfaces of the water bug Notonecta glauca: a model for friction reduction and air retention

• Petra Ditsche-Kuru,
• Erik S. Schneider,
• Jan-Erik Melskotte,
• Martin Brede,
• Alfred Leder and
• Wilhelm Barthlott

Beilstein J. Nanotechnol. 2011, 2, 137–144, doi:10.3762/bjnano.2.17

• ecological interest because an air film can reduce friction of solid bodies sliding through the water. This opens perspectives for biomimetic applications such as low friction fluid transport or friction reduction on ship hulls. For such applications the durability of the air film is most important. While

• extremely interesting as a biomimetic model for low friction fluid transport or drag reduction on ship hulls. Keywords: air film; aquatic insects; backswimmer; drag reduction; superhydrophobic surfaces; Introduction Superhydrophobic surfaces are of great economic interest because of their amazing

• and ecological interest for low friction fluid transport and friction reduction on ship hulls [10][11][12]. On some technical superhydrophobic surfaces extremely high drag reduction of up to 50% was measured, but on these surfaces the air film lasted only a short time [13][14][15]. Biological air