Abstract This study examined the mean and turbulent wind speed distribution within canopy height of a tropical urban campus based on representative geometry model via tunnel experiments. The vertical profiles were analysed around two high-rise buildings, Menara Razak (MR) Residensi Tower (RT) at both directions (22.5° 202.5°). To examine influence buildings strong wind, collected data ( u ), root square rms skewness SK ) analysed. Effects direction, building layout or arrangement under also...

The global drive for clean energy sources to replace carbon-based fossil fuels necessitates the development of advanced fabrication processes thermoelectric materials. Thermoelectric materials can generate electricity from ambient heat, making them promising low-power generating devices that typically rely on batteries with limited lifespans. Compared bulk materials, thin films offer enhanced performance due increased Seebeck coefficient and reduced thermal conductivity. However, fabricating...

This research proposed a novel method for evaluating the ideal spectral wavelength by integrating aerial remote sensing image and geophysical techniques to improve detection of buried archaeological proxies via wavelength. Eight different ranges were compared eight distinct indices conduct more thorough vegetation analysis. The information from various Vegetation Indices two types resistivity data was then analyzed using Linear Regression model. Then, "Constant Experimental Evaluation" (CEE)...

Improvement to the next-generation high-speed train (NG-HST) is ongoing particularly in achieving a higher operating speed. Consequently, aerodynamic effect of will be more critical as it affects development wake flow characterized by complex and unsteady structures. Although Reynolds number (Re) on forces negligible, its NG-HSTs unknown. In this study, Re ranging from 7.42 × 105 1.62 106 was used examine characteristics vortex structures, streamline distributions, velocity characteristics,...

By linking common things to the internet and enabling them interact carry out diverse tasks, Internet of Things (IoT) is revolutionizing globe. A huge rise in data has resulted from this connectedness, need for energy power these gadgets also rising. As number IoT devices continues rise, it essential find effective sustainable ways them. transforming ambient into usable electricity, harvesting provides a workable answer dilemma. It possible consume captured right now or store later. The...

In a typical urban area where buildings are built in cluster with random spacing, the distribution of wind pressure on building is influenced by interference effects from neighbouring buildings, which could ultimately affect wind-induced ventilation across building. Large-eddy simulations (LESs) were conducted for six cases staggered arrays various packing densities (λp). addition, heterogeneity surface was represented different heights. Each type had aspect ratio αp (the front to planar...

An H-rotor vertical axis wind turbine (VAWTs) can operate independently in any direction, making it aerodynamically efficient and suitable to harness energy low speed areas. The aerodynamic efficiency of VAWTs is highly dependent on the blade geometry, especially tip. Tip vortices produced at tips negatively affect VAWT’s efficiency. Adding endplates minimize effects tip VAWTs. In this paper, several endplate designs are used evaluate effectiveness improving power coefficient, Cp a VAWT...

Nowadays, the demand for a high-speed car increases in which vehicle stability and fuel economy are primary concern. The vehicle's aerodynamics plays crucial role as it influences overall performance of vehicles. In exploration aerodynamics, involves studying various forces that act on while moving road, i.e., drag force, lift force. leading causes aerodynamic automotive vehicles flow separation at vehicles' rear end. By reducing is possible to increase economy. research focused effect...

The present study used large eddy simulations (LES) to examine the pedestrian wind velocity distribution for several cases of terraced houses with extensions. Two simulation idealized were performed extension elements in square (E-SQ) and staggered (E-ST) arrangements. These treated as secondary roughness. A without (NE) was also provide a baseline comparison. mean from LES showed that roughness strictly limited flow penetration both cases, which reduced turbulent kinetic energy (TKE) inside...

Understanding the characteristics of natural, wind-induced ventilation buildings is essential for accurate predictions flow rates; however, indoor significantly influenced by surrounding buildings. Therefore, a series wind-tunnel experiments were performed to clarify relationship between outdoor and air flows around within target cube model with several openings. Two building arrangements, namely square (SQ) staggered (ST), placed under condition coverage ratio 25%. The results indicated...

Wind-induced ventilation is widely acknowledged as one of the best approaches for inducing natural ventilation. Computational fluid dynamics (CFD) technique gaining popularity among researchers an alternative experimental methods to investigate behavior wind-driven in building. In this present paper, Reynolds averaged Navier-Stokes equation (RANS) k-ε model approach considered simulate airflow on a simplified cubic building with opening single façade. Preliminary simulation using models...

Similar to most tropical countries, Malaysia have low wind speed and airflow characteristics provide an effective natural ventilation system for comfortable living especially in terrace houses. Even so, by designing them with suitable threshold height/width, H/W, ratio may help reduce heat sink, or even the accumulation of contaminants within setback distance. Through this study, downstream building these houses will be investigated due effects from upstream building. With use Large-Eddy...

Wind flow in the urban boundary layer is influenced by both large- and small-scale surface roughness. In this study, Reynolds-averaged Navier-Stokes simulations using renormalisation group (RNG) k-ε model were performed to study wind square arrays with roughness elements at front back of cubical obstacles packing densities 25.0% 30.9%. The presence reduces streamwise velocity but increases turbulent kinetic energy. Moreover, small vortices are formed within canopy because generated profiles...

Beach resorts located in coastal areas are particularly vulnerable to natural disasters and extreme weather events. Climate change exacerbates these risks, with rising sea levels, intense rainfall, cyclones impacting communities, including hotel operators. This study aims address the challenge of tropical storms resulting from climate Langkawi's coastline region, specifically focusing on mitigating their impact pedestrian wind comfort. The research investigates quantitative vegetative...

Strong crosswinds can cause catastrophic accidents like overturning and derailment in extreme circumstances, therefore the train's capacity to tolerate their impacts is crucial. Despite significance of this issue, there exists a notable research gap understanding specific effects various positions high-speed train within tunnel on its aerodynamic loads flow structure under different crosswind conditions. To address gap, numerical simulations were performed using computational fluid dynamics....

This study examined blade tip loss to understand flow separation around H-Rotor Vertical-Axis Wind Turbines (VAWTs). Vortex development the requires separation. Near tip, creates concentrated vorticity and vortices. Blade vortices affect Vertical Axis Turbine (VAWT) efficiency. Understanding vortex dynamics improves VAWT performance. uses 3D CFD using Improved Delayed Detached Eddy Simulation (IDDES) turbulence model. accuracy can be studied several test cases with different grid densities...

Atmospheric boundary layer (ABL) flow can be generated in an open-loop wind tunnel (BLWT) to simulate a realistic rough-wall condition imposed on the natural wind. An BLWT experiment is performed this work using wall barrier and roughness elements as passive devices create reproduce neutral ABL flow. The used are homogeneous cubic blocks with side length of 25 mm arranged staggered layout at 12.5% packing density. Wind velocity data measured upstream test section hot-wire anemometer (HWA)...

This research proposed a novel method for evaluating the ideal spectral wavelength by integrating aerial remote sensing image and geophysical techniques to improve detection of buried archaeological proxies via wavelength. Eight different ranges were compared eight distinct indices conduct more thorough vegetation analysis. The information from various Vegetation Indices two types resistivity data was then analyzed using Linear Regression model. Then, "Constant Experimental Evaluation" (CEE)...