Abstract By using the CFD (Computational Fluid Dynamics) software, RNG (Renormalization Group) turbulence model and mud shield module are employed to establish a three-dimensional mathematical of scouring around wind power pile foundation. The reliability is verified by literature results. A new foundation protection method proposed. thickness diaphragm protective layer 0.5 cm, 1 2 4 6 8 10 cm....

Based on RNG k-ε turbulence model and dynamic grid technology, the internal fluid dynamics of splash lubrication three stage planetary gear reducer system is established. The distribution lubricating oil convective heat transfer characteristic in at different input rotational speeds are analyzed. results show that high speed condition, gas mixing volume degree atomization higher, coefficient to...

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 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 general flow structure over transverse aeolian dunes is now well documented through both field studies and wind tunnel experiments. Research on windward (stoss) slopes of dunes is extensive and has recently been complemented by research on the lee-side flow structure. However, a number of technical deficiencies in wind tunnel instrumentation and a lack of detailed resolution in and appropri...

Energy crisis in particular, electricity the isolated rural areas of Indonesia is a very crucial issue that needs to be resolve through electrification . Compared other options, pico hydro cross-flow turbine (CFT) better option provides electrical power for areas. Studies improve CFT performance can undertaken analytically, numerically, experimentally, or combination those methods. However, dev...

This paper presents a pre-mixed combustion model for diesel and Jatropha oil blends combustion studies. Jatropha oil blends are considered as a mixture of diesel and Jatropha oil. CFD package, FLUENT 6.3 is used for modeling the complex combustion phenomenon in compression ignition engine. The experiments are carried out on a single cylinder, four strokes, water cooled direct injection compress...

mixed convection is a fundamentally significant heat transfer mechanism that occurs in selection industrial and technological applications. in this study, first the laminar mixed convection inside rectangular enclosure with moving wall and aspect ratio=10 is modeled and then the results are compared with other investigate. after showing varity of results, the investigation is continued with tur...

the purpose of this paper is to studying nonlinear k-ε turbulence models and its advantages in internal combustion engines, since the standard k-ε model is incapable of representing the anisotropy of turbulence intensities and fails to express the reynolds stresses adequately in rotating flows. therefore, this model is not only incapable of expressing the anisotropy of turbulence in an engine c...