As one of the typical negative factors affecting vortex structure and flow characteristics hydraulic machinery, TLV has a non-negligible impact on energy performance. In order to improve utilization efficiency machinery in marine energy, parallel grooves is proposed applied NACA0009 hydrofoil. Subsequently, an exhaustive numerical analysis carried out adopting SST k-ω turbulence model, effects ...

The present work includes a study of the impact varying pitch angles and angular velocity on performance parameters horizontal axis wind turbine using computational fluid dynamics. Simulations have been made commercial Ansys 15 software. Seven are chosen for study, i.e., 0° , 5 ° 10° 15° 20° 25° 28°, two values 1.57 rad/sec 2.22 used simulation. turbulence model is shear stress transport (SST) ...

Use of laminar flow-derived power law models to predict hemolysis with turbulence remains problematical. Flows in a Couette viscometer and a capillary tube have been simulated to investigate various combinations of Reynolds and/or viscous stresses power law models for hemolysis prediction. A finite volume-based computational method provided Reynolds and viscous stresses so that the effects of a...

Abstract The mesh significantly influences the quality of numerical results in computational fluid dynamics (CFD) problems due to its correlation with turbulence models. In present paper a structured was generated using Gmsh and two semi-structured meshes were snappyHexMesh determine suitable distribution for simulating unsteady cavitation around plane convex hydrofoil. simulation conducted by ...

The backward-facing step flow (BFSF) is a classical problem in fluid mechanics, hydraulic engineering, and environmental hydraulics. nature of this flow, consisting separation reattachment, makes it worthy investigation. In study, divided into two parts, the effect cylinder placed downstream on 2D structure was investigated. Part 1, BFSF validated by using OpenFOAM. characteristics (reattachmen...

This study used a NACA 6409 smooth wing section. Its performance is compared to an enhanced design incorporating revolving cylinder on the upper airfoil surface. The boundary conditions for present work were Reynolds (105), and attack angles (0,2,4,6,8,10,12,14,16). A turbulence model was developed (SST K-), one of aerodynamics models. well-suited sensing flow near wall. evaluated at three posi...

Abstract Computational fluid dynamics analysis of a building plan has been investigated with predominant wind velocity for different directions. The flow properties’ variation in the computational domain modeled by solving Reynolds-Averaged Navier–Stokes (RANS) equations finite volume second-order discretization scheme. turbulence airflow distribution and around Shear Stress Transport (SST) k–ω...

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...

The aerodynamic characteristics of an isolated MRH 90 helicopter fuselage have been investigated using Computational Fluid Dynamics (CFD). Simulations utilised an unstructured tetrahedral grid and both the k-ε and k-ω SST turbulence models were investigated. Standard ‘law of the wall’ wall functions were incorporated, along with a segregated finite volume solver. A wind tunnel testing program w...