To investigate the buoyancy characteristics of building façades, this study deals with experimental and numerical investigations on façade flow temperature field in different conditions height-aspect ratio facade. PIV measurements are conducted a static wind platform for obtaining mean velocity, vertical velocity horizontal around surface. simulate plume accurately, adopt three model compared r...

Bu çalışmada, türbülanslı akış koşullarında bir ısı değiştirici borusunda % 0.5-1 aralığında altı farklı hacimsel karışım oranına sahip Grafen-Demir Oksit-Su hibrit nanoyakışkanın entropi üretim analizi sayısal olarak incelenmiştir. Boru üzerine sabir akısı sınır şartı uygulanmış ve Reynolds sayısı çalışma aralığı 10000-50000 belirlenmiştir. Sayısal analizde k − ε RNG çözüm metodu seçilmiş ağ b...

The flow fields around single and two combinations of star shape artificial reefs are investigated both numerically and experimentally. The numerical model is based on the Reynolds Navier-Stokes (RANS) equations embedded with a RNG k-ε turbulence model and SIMPEC algorithm. The governing equations are solved by using finite volume method (FVM). Non-invasive particle image velocimetry flow field...

The present study comprises steady state, two-dimensional computational investigations performed on NACA 0012 airfoil to analyze the effect of Gurney flap (GF) on airfoil aerodynamics using k-ε RNG turbulence model of FLUENT. Airfoil with GF is analyzed for six different heights from 0.5% to 4% of the chord length, seven positions from 0% to 20% of the chord length from the trailing edge, and s...

The objective of this research is to compare the use of empirical correlation with Computational Fluid Dynamics (CFD) simulation in determining the pressure gradient in two-phase flow pipelines at the same inlet condition. In this work, the empirical model of Beggs and Brill model had been used whereas the turbulent model applied in the CFD simulation was the Renormalization Group (RNG) k-ε mod...

Pressure drop characteristics of turbulent flow through 90 degree pipe bends are numerically investigated by computational fluid dynamic simulation using k-ε RNG turbulence model with standard wall function. After the validation of present model against existing experimental results, a detailed study has been performed to investigate the pressure distribution and pressure drop characteristics o...

A comparative performance analysis of the CFD platforms OpenFOAM and FLOW-3D is presented, focusing on a 3D swirling turbulent flow: a steady hydraulic jump at low Reynolds number. Turbulence is treated using RANS approach RNG k-ε. A Volume Of Fluid (VOF) method is used to track the airewater interface, consequently aeration is modeled using an EulerianeEulerian approach. Structured meshes of c...

The fuel injector is a critical component of the internal combustion engine. diameters nozzle and control chamber’s oil inlet outlet are generally between 0.2 0.5 mm, which typical microchannel structures. During high-pressure injection, cavitation phenomenon in channel seriously affects reliability choice turbulence models key to investigate by using numerical methods. Based on Winklhofer expe...

This companion paper investigates the hydrodynamics of turbulent bores that propagate on a horizontal plane and have striking resemblance to dam break waves tsunami-like hydraulic bores. The focus this is propagation bore over mitigation canal using both laboratory experiments numerical simulations. In first part paper, effects depth time histories wave height velocity were experimentally inves...

OBJECTIVE To assess the safety, efficacy, and cost-effectiveness of rapid nasogastric hydration (RNG) and rapid intravenous hydration (RIV) administered in the emergency department (ED) to young children suffering with uncomplicated, acute moderate dehydration. METHODS Ninety-six children aged 3 to 36 months, who presented with signs and symptoms of uncomplicated, acute moderate dehydration c...