The purpose of this study was to investigate the natural ventilation potential in an apartment unit a high-rise building. A corner two-bedroom selected for study, where single-sided and cross occurred unit. This employed CFD simulation model indoor airflow West Jakarta. units were modelled simulated using with RANS k-ε turbulence model. results validated readings from field measurements that ha...

Wind barriers can effectively reduce the risk of overturning and derailment high-speed trains running on a bridge under crosswind. However, it adversely affect wind resistance bridge. There are few studies aerodynamic performance curved barriers. In this paper, effects with four curvatures (0, 0.2, 0.35, 0.50) different train-bridge combinations crosswind characteristics system investigated. Th...

In this study, the velocity field in a naturally ventilated building within an urban-like array was explored using large-eddy simulations. Reduced-scale models were used to examine impacts of geometric conditions surrounding buildings and cross-ventilating windows on flow statistics instantaneous fields sheltered building. The components averaged opening area calculated for each condition array...

to enhance the understanding of the impact of obstacle buildings on pollution transportationand dispersion in the atmospheric boundary layer, it is necessary to know the atmospheric flow characteristics over terrains. wind flow characteristics in a boundary layer over a step-shaped cliff topography model with rough and smooth surfaces were studied numerically using computational fluid dynamics ...

Double-loaded affordable apartments, which are commonly seen in tropical developing countries, suffer from poor cross-ventilation, particularly on the leeward side of buildings. This study aims to parametrically evaluate closed-vertical void configurations improve ventilation performance double-loaded apartment building using validated CFD models. The include aspect ratio void, pilotis size and...

A simple and efficient flow field visualization method (based on shadow imaging) was applied in a direct-connect test to explore the influence of momentum flux ratio jet angle formation evolution nitrogen jets supersonic combustion chambers. The setup adopts rectangular passage simulate flight condition with Mach number 6 altitude 25 km. experimental results showed that (a) adopted this paper c...

Abstract We developed a snowdrift model to evaluate the height around snow fences, which are often installed along roads in snowy, windy locations. The consisted of conventional computational fluid dynamics solver that used lattice Boltzmann method and module for calculating particles’ motion accumulation. calculation domain was half channel with flat free-slip boundary on top non-slip bottom, ...

In this study, the wake behind a wind turbine located on an escarpment is investigated using particle-image velocimetry in tunnel. Five different models are used, which vary windward side shape from forward facing steps (FFS) with curvatures at leading-edge to sinusoidal ramp shapes varying slopes. The difference base flow (flow without turbine) resulting change geometry of leads significant di...

Different from traditional concentrated power-collection and boosting-voltage (CPCB) topology adopted by HVDC station, this paper adopts a distributed cascaded (DPCB) for offshore DC station to collect power boost voltage, which consists of multiple single active bridges (SABs). It has merits strong DC-voltage boosting ability, low design difficulty cost, system error rate. Three aspects are st...