Micro-scale considerations on the onset of contact erosion: (Abstract)

Reynolds number effect on 3D turbulent offset jet reattaching to a free surface

Experimental study was carried out to investigate the effect of Reynolds number on 3D offset jet reattaching to above free surface. Sharp edged square nozzle was used to produce the jets, and the measurements were performed at the following six different Reynolds numbers: 2300, 3700, 5100, 7900, 10300 and 11900. Detailed velocity measurements...

Experimental and numerical investigations on the flow field inside pre-and post-surgery models of posterosuperior septectomy

Three physiological functions of nasal breathing (air-conditioning, filtering and smelling) are closely related with airflow characteristics in the human nasal airway. Since fluid mechanical properties are heavily affected by the geometry of flow passage, the changes in anatomical shape of nasal cavity by disorders or surgical treatments alter...

Stereo-PIV Measurement of Turbulence Shear Stress in a Stirred Flow Mixer

The turbulence dissipation rate and turbulence shear stress are estimated inside a cylindrical, stirred flow mixer by carrying out Stereo PIV measurements in twelve vertical and three horizontal planes. The flow domain is vertically oriented, filled with the water. A commercially-available, three-blade impeller, HR-100, is used as the agitator....

PIV on the surface

New approach to surface flow visualization based on combination of oil film method with PIV approach is presented. Oil film is seeded with optically contrast particles and two or more images of these contrast particles are acquired at some time interval at desirable flow parameters. Cross-correlation analysis of these images allows to determine...

Optical investigation into the effects of suffusion in a granular medium

The current paper presents a novel experimental method which is able to capture the effects of suffusion by substitution of the fines in a sample by salt of a similar grain size. The setup is tailored to optically capture the change in soil structure behind a glass window in a plane strain strongbox using a digital camera. Subsequently, digital...

Particle Sedimentation in Wall-Bounded Turbulent Flows

In this work, a comparison between the results of point-particle direct numerical simulations and PIV/PTV experiments of a particle-laden horizontal channel flow is presented. The numerical simulations were preformed trying to mimic as much as possible the experimental conditions. The accuracy of the point-particle approach was evaluated by...