Physics – Fluid Dynamics
Scientific paper
2008-10-10
Physics
Fluid Dynamics
American Physical Society Division of Fluid Dynamics 2008 Annual Meeting Replaced previous version because abstract had LaTex
Scientific paper
This fluid dynamics video shows the impact of a hydrophobic sphere impacting a water surface. The sphere has a mass ratio of m* = 1.15, a wetting angle of 110 degrees, a diameter of 9.5 mm, and impacts the surface with a Froude number of Fr = 9.2. The first sequence shows an impact of a sphere on the free surface illustrating the formation of the splash crown and air cavity. The cavity grows both in the axial and radial direction until it eventually collapses at a point roughly half of the distance from the free surface to the sphere, which is known as the pinch-off point. The second set of videos shows a sphere impacting the free surface under the same conditions using Particle Image Velocimetry (PIV) to quantify the flow field. A laser sheet illuminates the mid-plane of the sphere, and the fluid is seeded with particles whose motion is captured by a high-speed video camera. Velocity fields are then calculated from the images. The video sequences from left to right depict the radial velocity, the axial velocity, and the vorticity respectively in the flow field. The color bar on the far left indicates the magnitude of the velocity and vorticity. All videos were taken at 2610 fps and the PIV data was processed using a 16 x 16 window with a 50% overlap.
La Foy Roderick R.
Techet Alexandra H.
Truscott Tadd T.
No associations
LandOfFree
Quantitative Flow Field Imaging about a Hydrophobic Sphere Impacting on a Free Surface does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Quantitative Flow Field Imaging about a Hydrophobic Sphere Impacting on a Free Surface, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Quantitative Flow Field Imaging about a Hydrophobic Sphere Impacting on a Free Surface will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-528364