The purpose of this paper is to understand the mechanism of non-axisymmetric wall-thinning that caused a pipe break in the pipeline of the Mihama nuclear power plant in 2004. The wall thinning was caused by the flow accelerated corrosion which affects low carbon steel pipelines. The mass transfer rate measurement of the wall thinning behind an office in a curved swirling flow is carried out in ...

The wavelet transform is applied to experimental pressure fluctuations in swirling gas-particle two-phase flows in this paper, to identify and interpret flow pattern transitions in both Fourier and physical spaces. From randomlike pressure fluctuations the characteristic of swirling gas-particle twophase flows can be extracted, and the relationship between the wall pressure fluctuation and the ...

conveying velocity, pipe wear, and particle degradation. An experimental study has Yuji Tomita addressed the characteristics of swirling flow pneumatic conveying (SFPC) for the Professor, total pressure drop, solid flow patterns, power consumption, and additional pressure Department of Mechanical Engineering, drop. Polystyrene, polyethylene, and polyvinyl particles with mean diameters of 1.7, K...

The design and optimization of hydrocyclones using CFD techniques are gaining popularity and the key to a successful simulation lies with the accurate description of the high turbulent swirling behavior of the flow. This paper presents a detailed co...

We propose a new criterion to characterize hierarchical two-dimensional vortex regions induced by swirling motion. Central to the definition are closed loops that intersect the flow field at a constant angle. The union of loops belonging to the same area of swirling motion defines a vortex region. These regions are disjunct but may be nested, thus introducing a spatial hierarchy of vortex regio...

The paper investigates the impact of heat release and pilot jet location on the swirling flow structures in a coannular swirl burner without confinement. Two iso-thermal turbulent swirling flow cases and three turbulent premixed swirling flames are studied with the aid of large-eddy simulation. Two geometries are considered, one featuring a pilot lance flush with the outlet and one with retract...

Vortex breakdown of swirling, round jet flows is investigated in the compressible, subsonic regime by means of Direct Numerical Simulation (DNS). This is achieved by solving the compressible Navier–Stokes equations on a cylindrical grid using high-order spatial and temporal discretization schemes. The Reynolds number is Re = ρ c w ◦ c R ◦/μ◦c = 5000 and the flow is moderately compressible with ...