In the present work, thermo-fluidic behavior of a heat exchanger tube with conical shaped insert has been investigated help finite volume method. To enhance transfer rate, two different types roughness used in i.e. protrusion and dimple roughness. A three-dimensional computational model RNG turbulence is for simulation it performed three diameters (3 mm, 6 mm 9 mm) pitch space (120 180 both The...

For analysis of the flow field of torque converter’s start operating performance, the paper established a mathematical model and simulated the numerical value of YJ series hydrodynamic torque converter. In view of the partial impact fluid and cavitation phenomenon in processes such as multiple flow area coupling algorithms the sliding mesh method cannot achieve the flow parameters real-time tra...

ABSTRACT The flow of air past a smooth surface-mounted hemisphere is investigated numerically using six common RANS turbulence models and seeking steady solutions. Where possible, the are applied standard wall functions, resolving viscous sublayer, enhanced treatment option in ANSYS Fluent. Results simulations compared against measurements taken wind tunnel experiment. comparison shows that bou...

This research examines the effect of using Bayburt stone or basalt as an energy storage unit in SCPPs. The low-cost materials on system performance is evaluated. Based Manzanares pilot plant (MPP), a 3D CFD model was created. Geometric parameters were kept constant simulations performed with ANSYS FLUENT engineering commercial software. In addition to DO (discrete coordinates) for radiation mod...

This study investigates the effects of elbow on transition and development multiphase flow using computational fluid dynamics modelling techniques. The Eulerian - Multifluid VOF model coupled with an Interfacial Area Transport Equation has been employed to simulate air-water two-phase in a pipe two standard 90 degree elbows mounted series. Turbulence were accounted for by RNG k-ε model. separat...

Measurement of discharge in open channels is one of the main concerns in hydraulic engineering. The structures used for this aim should be accurate, economical and easy to use. Weirs are among the oldest and most convenient hydraulic structures that have been used in both laboratory and field for flow measurement in open channels. Due to limitations of simple sharp crested weirs, recently compo...

Abstract Stepped spillways are suitable and economical options for high-storage dams that require significant energy dissipation, structural adaptation to roller-compacted concrete dams, spontaneous flow aeration. In this study, a numerical analysis of the hydraulic characteristics skimming regime stepped spillway Zirdan Dam is carried out. A comparison between smooth provided. By preparing mod...

The present study examines the possibility of using an industrial stirred chemical reactor, originally employed for liquid–liquid mixtures, operating with two-phase liquid–solid suspensions. It is critical when obtaining a high-quality product that solid phase remains suspended in liquid long enough reaction takes place. impeller was designed preparation prescribed composition. aims at finding,...

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...

H-rotor Vertical Axis Wind Turbine (VAWT) is one of the most efficient energy suppliers which have been investigated in many recent types of research. The aim of this work is to study the aerodynamic performance of a doubled-row H-Darrieus VAWT. First, an ordinary three-bladed VAWT with NACA4415 profile is simulated by means of 3D computational fluid dynamics (CFD) and results are compared to a...