Xueyan Lin^1,#, Mingtao Wu^2,#, Guodong Li^1,*, Nan Guo³, Lidan Mei¹

Structural Durability & Health Monitoring, Vol.18, No.6, pp. 805-833, 2024, DOI:10.32604/sdhm.2024.051033 - 20 September 2024

Abstract In this paper, a new type of bamboo scrimber column embedded with steel bars (rebars) was proposed, and the compression performance was improved by pre-embedding rebars during the preparation of the columns. The effects of the slenderness ratio and the reinforcement ratio on the axial compression performance of reinforced bamboo scrimber columns were studied by axial compression tests on 28 specimens. The results showed that the increase in the slenderness ratio had a significant negative effect on the axial compression performance of the columns. When the slenderness ratio increased from 19.63 to 51.96, the failure… More >

Zhong’an Zheng¹, Xiang Xia², Wei Ji³, Jichao Ye³, Jianyong Wu³, He Lin¹

Revista Internacional de Métodos Numéricos para Cálculo y Diseño en Ingeniería, Vol.40, No.2, pp. 1-6, 2024, DOI:10.23967/j.rimni.2024.05.007 - 29 May 2024

Abstract The effects of opening parameters on the bending behavior of fixed open-web steel beams under static loading were experimentally investigated using six specimens of different opening length-to-height ratios, area ratios, and distributions. The experimentally obtained failure modes, bearing capacities, and load-displacement curves of the specimens were compared with those extracted from numerical simulations performed via Abaqus finite element analysis software. The results revealed the following: (i) The typical failure mode of the fixed open-web steel beams was plastic failure at the opening corners in the shear-bending sections, with compressive corners experiencing flexion and tensile corners More >

Jianhua Zhang^1,2, Wen Sun³, Zhijun Li^1,*

Energy Engineering, Vol.121, No.10, pp. 2893-2906, 2024, DOI:10.32604/ee.2024.051093 - 11 September 2024

Abstract Two types of tightly coupled Selective Catalytic Reduction (SCR) mixers were designed in this study, namely Mixer 1 integrated with an SCR catalyst and Mixer 2 arranged separately. Computational Fluid Dynamics (CFD) software was utilized to model the gas flow, spraying, and pyrolysis reaction of the aqueous urea solution in the tightly coupled SCR system. The parameters of gas flow velocity uniformity and ammonia distribution uniformity were simulated and calculated for both Mixer 1 and Mixer 2 in the tightly coupled SCR system to compare their advantages and disadvantages. The simulation results indicated that Mixer… More >

Zongjun Ke¹, Mian Xia^2,*, Weibo Yang³, Bingjie Hou², Hanhui Deng⁴

International Journal of Mental Health Promotion, Vol.26, No.8, pp. 663-670, 2024, DOI:10.32604/ijmhp.2024.049161 - 30 August 2024

Abstract Background: Understanding how to improve mental health literacy is conducive to maintaining and promoting individuals’ mental health and well-being. However, to date, interventions for mental health literacy primarily depend on traditional education and contact interventions, which have limitations with regard to pertinence and individualization. Artificial intelligence (AI) and big data technology have influenced mental health services to be more intellectual and digital, and they also provide greater technical convenience for individualized interventions for promoting mental health literacy. However, there is relatively little research on the effectiveness of individualized online intervention for mental health literacy in… More >

Hao Chen^1,2, Xianbin Teng^2,*, Faxin Zhu^1,*, Zhibin Zhang², Jie Wang¹

FDMP-Fluid Dynamics & Materials Processing, Vol.20, No.8, pp. 1799-1821, 2024, DOI:10.32604/fdmp.2024.049731 - 06 August 2024

Abstract Scouring experiments were conducted using a three-dimensional laser scanning technology for angles of the jet spanning the interval from 0° to 30°, and the characteristics of the scour hole in equilibrium conditions were investigated accordingly. The results indicate that the optimal scouring effects occur when the jet angle is in the ranges between 15° and 20°. Moreover, the dimensionless profiles of the scour hole exhibit a high degree of similarity at different jet angles. Numerical simulations conducted using the Flow-3D software to investigate the bed shear stress along the jet impingement surface have shown that More >

Tiantian Yu¹, Youping Lv¹, Hao Zhong², Ming Liu¹, Pingyuan Gai¹, Zeju Jiang¹, Peng Zhang¹, Xingkai Zhang^2,*

FDMP-Fluid Dynamics & Materials Processing, Vol.20, No.8, pp. 1759-1772, 2024, DOI:10.32604/fdmp.2024.049035 - 06 August 2024

Abstract A new measurement device, consisting of swirling blades and capsule-shaped throttling elements, is proposed in this study to eliminate typical measurement errors caused by complex flow patterns in gas-liquid flow. The swirling blades are used to transform the complex flow pattern into a forced annular flow. Drawing on the research of existing blockage flow meters and also exploiting the single-phase flow measurement theory, a formula is introduced to measure the phase-separated flow of gas and liquid. The formula requires the pressure ratio, Lockhart-Martinelli number (L-M number), and the gas phase Froude number. The unknown parameters More >

Nannan Liu^*, Hengchen Qi, Hui Xu, Yanfeng He

FDMP-Fluid Dynamics & Materials Processing, Vol.20, No.8, pp. 1731-1741, 2024, DOI:10.32604/fdmp.2024.048354 - 06 August 2024

Abstract Low salinity water containing sulfate ions can significantly alter the surface wettability of carbonate rocks. Nevertheless, the impact of sulfate concentration on the desorption of oil film on the surface of carbonate rock is still unknown. This study examines the variations in the wettability of the surface of carbonate rocks in solutions containing varying amounts of sodium sulfate and pure water. The problem is addressed in the framework of molecular dynamics simulation (Material Studio software) and experiments. The experiment’s findings demonstrate that sodium sulfate can increase the rate at which oil moisture is turned into More > Graphic Abstract

Nan Liu^1,2, Chen Hong^3,4,5, Xinchao Su^3,4,5, Xing Jin^1,2, Chen Jiang^3,4,5,*, Yuqi Shi^1,2, Bingkun Wang^1,2

FDMP-Fluid Dynamics & Materials Processing, Vol.20, No.8, pp. 1867-1882, 2024, DOI:10.32604/fdmp.2024.047427 - 06 August 2024

Abstract As the velocity of a train increases, the corresponding air pumping power consumption of the brake discs increases proportionally. In the present experimental study, a standard axle-mounted brake disc with circumferential pillars was analyzed using a 1:1 scale model and a test rig in a wind tunnel. In particular, three upstream velocities were selected on the basis of earlier investigations of trains operating at 160, 250, and 400 km/h, respectively. Moreover, 3D steady computational fluid dynamics (CFD) simulations of the flow field were conducted to compare with the wind tunnel test outcomes. The results for More >

Yuanyuan Zhao¹, Fujian Zhao², Guohui Li³, Wei Xu^4,*, Xiuli Wang^2,*

FDMP-Fluid Dynamics & Materials Processing, Vol.20, No.8, pp. 1883-1901, 2024, DOI:10.32604/fdmp.2024.047298 - 06 August 2024

Abstract Self-excited oscillating jets (SOJ) are used in several practical applications. Their performances are significantly affected by structural parameters and the target distance. In this study, a geometric model of the SOJ nozzle accounting for multiple structural parameters is introduced, then the related cavitation performances and the optimal target distance are investigated using a Large-Eddy Simulation (LES) approach. Results are also provided about an experiment, which was conducted to validate the simulation results. By analyzing the evolution of the vapor volume fraction at the nozzle outlet, a discussion is presented about the effect of the aforementioned… More >

Ye Hoon Lee¹, Yonghyun Park^2,3, Hyungsook Kim^2,3,*

International Journal of Mental Health Promotion, Vol.26, No.7, pp. 569-578, 2024, DOI:10.32604/ijmhp.2024.051773 - 30 July 2024

Abstract Regular physical activity (PA) is known to enhance multifaceted health benefits, including both physical and mental health. However, traditional in-person physical activity programs have drawbacks, including time constraints for busy people. Although evidence suggests positive impacts on mental health through mobile-based physical activity, effects of accumulated short bouts of physical activity using mobile devices are unexplored. Thus, this study aims to investigate these effects, focusing on depression, perceived stress, and negative affectivity among South Korean college students. Forty-six healthy college students were divided into the accumulated group (n = 23, female = 47.8%) and control… More >