Article
Engineering, Ocean
Ai-jun Li, Yong Liu, Hui Fang, Xiao Liu
Summary: This paper investigates the wave scattering problem of a periodic array of rectangular porous rubble-mound breakwaters and develops an analytical solution based on potential flow and classical porous medium theories. Various analyses are conducted and useful results for engineering applications are presented.
APPLIED OCEAN RESEARCH
(2022)
Article
Chemistry, Physical
Ping-Che Lee, Yu-Liang Hsiao, Jit Dutta, Ruey-Chi Wang, Shih-Wen Tseng, Chuan-Pu Liu
Summary: This study explores the use of porous ZnO thin films to enhance the output voltage and sensitivity of piezoelectric nanogenerators. The presence of pores leads to lattice contraction in the c-direction, resulting in improved performance. Transmission electron microscopy characterizations confirm the mechanism behind the enhancements.
Article
Mechanics
Mengyang Liu, Wenxin Huai, Bin Ji, Peng Han
Summary: Aquatic plants play a crucial role in hydrodynamic and material transport processes in aquatic environments due to the additional flow resistance they induce. High-resolution numerical experiments were conducted to study the drag characteristics of circular vegetation patches fully immersed in turbulent open channel flow. The study found that vegetation density and relative diameter affect the flow resistance exerted by the vegetation patch, with the drag coefficient of the submerged patch being smaller than the emergent patch for certain dimensions.
Article
Thermodynamics
Zhilong Cheng, Ruina Xu, Pei-Xue Jiang
Summary: Porous structures play a significant role in fluid flow, heat transfer, and strength performance within thermal management and energy conversion systems. This study developed a method based on TPMS to customize porous media morphology and fabricate these structures using additive manufacturing. Different types of porous structures demonstrated variations in structural strength, heat transfer, and flow resistance.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Physics, Applied
Theo Cavalieri, Jean Boulvert, Vicent Romero-Garcia, Gwenael Gabard, Marie Escouflaire, Josselin Regnard, Jean-Philippe Groby
Summary: This study focuses on the optimization of metaporous acoustic surfaces by using additive manufacturing techniques to simplify the manufacturing process and control the acoustic properties of the surfaces. By optimizing the geometric parameters of the anisotropic metaporous surface using non-linear minimization techniques, the study successfully maximizes acoustic absorption while demonstrating the benefits of additive manufacturing in designing metaporous acoustic surfaces.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
Wei Wang, Jinwen Zhang, Guotao Xiao, Xu Liu, Han Qu, Shuangxi Zhou
Summary: A novel magnetic porous graphene oxide (GO-DFe) was prepared by growing Fe3O4 via an impregnation method in the nanoscale channel of porous GO (GO-DFP), which was fabricated by chemically intercalating 4,4 '-Diaminooctafluorodiphenyl (DFP) into the GO sheets. The effects of solution pH, ions (Cland NO3- ) and co-existed matters in effluent of municipal wastewater on the adsorption behavior of SD and CBZ on GO-DFe5 were further clarified. Additionally, the cyclic reuse performance of GO-DFe5 for SD and CBZ were also evaluated, and the potential adsorption mechanism was proposed by theoretical calculation. The as-prepared GO-DFe5 adsorbent exhibited high adsorption capacities for SD (380.67 mu mol/g) and CBZ (350.70 mu mol/g).
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Mechanics
Rajvinder Kaur, Avinash Chandra, Sapna Sharma
Summary: The study investigates momentum transfer from a semi-circular porous cylinder attached to a rectangular channel wall, revealing that porosity influences flow characteristics at high Darcy numbers, pressure coefficient has an inverse relationship with blockage ratio, and drag coefficient increases with all governing parameters.
Article
Physics, Multidisciplinary
Abdelraheem M. Aly, Zehba Raizah
Summary: The study found that an increase in the Hartmann number decreases the maximum velocity by 21.43%. Increasing the fusion temperature shifts the phase change zone towards the inserted heated crescent. The rotational parameter for the inner crescent affects the heat/mass transport and nanofluid movements within the circular cylinder.
Article
Engineering, Civil
Ximei Zhai, Xiaoxiong Zha, Kaichao Wang, Haiyang Wang
Summary: This study calculates the initial lateral stiffness of a plate-type modular steel frame structure with semi-rigid corner connections using a modified displacement method. The research reveals that the lateral amplification coefficients of plate-type modular frames with semi-rigid connections are influenced by the number of spans and stories, compared to those with rigid connections.
Review
Engineering, Mechanical
Abdelmadjid Mahiou, Mustapha Sadouki
Summary: This study presents an innovative acoustic method for characterizing porous media and determining key parameters related to wave propagation. The researchers successfully developed and applied this method to estimate parameters for polyurethane foam samples, demonstrating its accuracy and potential applications in noise control and acoustic insulation.
JOURNAL OF VIBRATION ENGINEERING & TECHNOLOGIES
(2023)
Article
Mechanics
Abhijit Sarkar, Swaroop Nandan Bora
Summary: The study examines the exciting forces between two coaxial vertical cylinders and introduces a device for converting ocean wave energy. Numerical experiments were conducted to analyze the impact of various parameters on exciting forces and wave run-up. The relationship between the porosity of the upper cylinder and energy loss was also explored.
ARCHIVE OF APPLIED MECHANICS
(2021)
Article
Engineering, Chemical
Mohammad Asif, Amit Dhiman
Summary: This study investigates the effect of aiding and opposing buoyancy on the flow and heat transfer of cylinders arranged in an equilateral triangular array in a heat exchanger. The results show that the impact of aiding/opposing buoyancy on thermal performance is predominant at higher porosities.
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
(2021)
Article
Physics, Multidisciplinary
Abhijit Sarkar, Swaroop Nandan Bora
Summary: The study investigates the radiation of ocean water waves in two different systems, considering translational motions in surge and heave directions. The research shows that the variation of porous coefficient, radii, and depth has immense influence on the coefficients for the cylindrical system.
WAVES IN RANDOM AND COMPLEX MEDIA
(2021)
Article
Engineering, Chemical
Ram Prakash Bharti, Ram Pravesh Ram, Amit Kumar Dhiman
Summary: In this study, the flow characteristics of non-Newtonian power-law fluids across a periodic square array of infinitely long circular cylinders were numerically investigated using an unstructured finite volume method. The effects of fluid volume fraction, Reynolds number, and power-law index on the flow behavior were explored. The results show that with increasing inertial forces, the flow becomes more dense and curved. Furthermore, the pressure coefficient over the surface of periodic cylinders is significantly influenced by the governing parameters.
ASIA-PACIFIC JOURNAL OF CHEMICAL ENGINEERING
(2022)
