Geometric parameters in solar chimney power plants are numerically optimised for the purpose of better output figures. Several have been investigated pilot plant such as height and diameter, collector diameter slope, slenderness. However, ground slope has not studied to date despite its perspicuous impact on turbulent flow. In this study, impacts different angles ground, where radiation is abso...

To evaluate the performance of RANS turbulence models, this study compares four different cavity flow benchmarks using prevailing two-equation models for indoor airflows, namely standard and RNG k-ε SST k-ω models. A consists one air inlet outlet slot. The slot is positioned on upper left corner cavity, whereas located in lower right. This representative mixing ventilation. These differ by thei...

Stably stratified canopy flow in complex terrain has been considered a difficult condition for measuring net ecosystem–atmosphere exchanges of carbon, water vapor, and energy. A long-standing advection error in eddy-flux measurements is caused by stably stratified canopy flow. Such a condition with strong thermal gradient and less turbulent air is also difficult for modeling. To understand the ...

Bottom outlets are significant structures of dams, which responsible for controlling the flow rate, operation, or removal reservoir sedimentation. The service gate controls outlet and whenever this is out order, emergency located at upstream utilized. cavitation phenomenon one common bottom outlets’ problems due to rapid transfer. present research a numerical study pattern in dam’s different op...

An aerodynamic technique to calculating lift and drag coefficients is one of the required instruments in wing design process. During last decades, several tools software have been developed according aero-dynamics numerical methods. Nowadays, aeronautical architecture requires many calculations. Today’s techno-logists use a variety simulation techniques avoid expensive model testing. This paper...

A two-dimensional air-fluidized bed of 600 mm width and 1000 mm height was studied to investigate the formation, rise and cracking process of a bubble. The particles were assumed to be regular round particles of diameter 4 mm. The RNG k-ε model was employed for the turbulence, and the time integration scheme is the first order implicit difference with the time-step 0.0001 s. The equations were ...

In order to obtain a deeper understanding of the regenerative cooling process of scramjet engines, in this paper, a numerical investigation on the supercritical convective heat transfer of n-decane in horizontal circular tubes was conducted, based on a complete set of conservation equations and the Renormalization group (RNG) k–ε turbulence model with enhanced wall treatment. The present study ...

Coarctation of the aorta is one of the five main congenital cardiovascular failures, accounting for 6–8 percent of these failures. This research aimed to simulate the blood flow of a seventeen-year-old male teen with a mild coarctation at one-third of his aorta's descending branch. The simulation was performed by extracting the domain and the input pulsatile velocity signal as the boundary cond...

Modern aircraft and missiles are gradually integrating thrust vector control systems to enhance their military capabilities. Bypass Dual-Throat Nozzle (BDTN) is a new fluidic vectoring technique capable of achieving superior performance with large angles low loss. In this study, we analyzed the flow characteristics parameters BDTN by varying bypass angle, nozzle convergence width. The governing...

Wastewaters are commonly discharged into the seas and oceans through multiport diffusers. Accurate prediction of complex interactions diffusers with receiving water bodies is significant for optimal design outfall systems has yet to be fully illuminated. In current study, mixing dilution characteristics multiple inclined dense jets studied using a three-dimensional numerical simulation. The Lau...