UKFN Videos 31/7/17 Others: Recent Episodes
Cambridge University
The videos show the propagation of heavier Newtonian fluid fronts (displacing fluid) and lighter polymer fronts (displaced fluid) in a lock exchange release flow in inclined pipe at 7deg. As the partition is opened, a gravity current is generated which causes the heavier fluid to slump to the bottom of the pipe and propagates downstream while a counter-flow of the lighter non-Newtonian polymer fronts (concentrations: 0.00 wt.%, 0.20 wt.% and 0.30 wt.%) will flow upstream at the top of the inclined pipe (pipe ID= 0.04m, length of pipe= 1.20m).
The videos show the propagation of heavier Newtonian fluid fronts (displacing fluid) and lighter polymer fronts (displaced fluid) in a lock exchange release flow in inclined pipe at 7deg. As the partition is opened, a gravity current is generated which causes the heavier fluid to slump to the bottom of the pipe and propagates downstream while a counter-flow of the lighter non-Newtonian polymer fronts (concentrations: 0.00 wt.%, 0.20 wt.% and 0.30 wt.%) will flow upstream at the top of the inclined pipe (pipe ID= 0.04m, length of pipe= 1.20m).
The videos show the propagation of heavier Newtonian fluid fronts (displacing fluid) and lighter polymer fronts (displaced fluid) in a lock exchange release flow in inclined pipe at 7deg. As the partition is opened, a gravity current is generated which causes the heavier fluid to slump to the bottom of the pipe and propagates downstream while a counter-flow of the lighter non-Newtonian polymer fronts (concentrations: 0.00 wt.%, 0.20 wt.% and 0.30 wt.%) will flow upstream at the top of the inclined pipe (pipe ID= 0.04m, length of pipe= 1.20m).
The videos show the propagation of heavier Newtonian fluid fronts (displacing fluid) and lighter polymer fronts (displaced fluid) in a lock exchange release flow in inclined pipe at 7deg. As the partition is opened, a gravity current is generated which causes the heavier fluid to slump to the bottom of the pipe and propagates downstream while a counter-flow of the lighter non-Newtonian polymer fronts (concentrations: 0.00 wt.%, 0.20 wt.% and 0.30 wt.%) will flow upstream at the top of the inclined pipe (pipe ID= 0.04m, length of pipe= 1.20m).
The videos show the propagation of heavier Newtonian fluid fronts (displacing fluid) and lighter polymer fronts (displaced fluid) in a lock exchange release flow in inclined pipe at 7deg. As the partition is opened, a gravity current is generated which causes the heavier fluid to slump to the bottom of the pipe and propagates downstream while a counter-flow of the lighter non-Newtonian polymer fronts (concentrations: 0.00 wt.%, 0.20 wt.% and 0.30 wt.%) will flow upstream at the top of the inclined pipe (pipe ID= 0.04m, length of pipe= 1.20m).
The videos show the propagation of heavier Newtonian fluid fronts (displacing fluid) and lighter polymer fronts (displaced fluid) in a lock exchange release flow in inclined pipe at 7deg. As the partition is opened, a gravity current is generated which causes the heavier fluid to slump to the bottom of the pipe and propagates downstream while a counter-flow of the lighter non-Newtonian polymer fronts (concentrations: 0.00 wt.%, 0.20 wt.% and 0.30 wt.%) will flow upstream at the top of the inclined pipe (pipe ID= 0.04m, length of pipe= 1.20m).
Jet noise is the dominant source when the aircraft takes off. It can be even higher when the engine is installed closed to the wing. The additional noise can be caused by nonlinear hydrodynamic jet-wing interactions and linear TE acoustics scatterings. Large-eddy simulation is performed to understand noise sources, and noise reduction technology is explored using serrated nozzles.
Early stages of capillary imbibition after water droplet impacts the porous surface. Four views are provided at different Weber number (different droplet size and impact velocity), showing the effect of impact velocity and porous media wettability on the droplet impact dynamics. Impact duration is 0.075 sec.
This is a standard top-view video showing atomisation or nebulisation of 10μL water droplet induced by ZnO surface acoustic waves (from left side). The atomisation is induced by sub-nanometre amplitudes of surface acoustic waves interacting with water droplet, causing capillary waves on droplet surfaces and ejecting tiny (pL or nL) droplets with different sizes, forming a nano-volcano eruption. The video is not a composite and has not been enhanced.
This is a high speed video showing atomisation or nebulisation of 3μL water droplet induced by ZnO surface acoustic waves (from left side). The atomisation is induced by sub-nanometre amplitudes of surface acoustic waves interacting with water droplet, causing capillary waves on droplet surfaces and ejecting tiny (pL or nL) droplets with different sizes, forming a nano-volcano eruption. The video is not a composite and has not been enhanced.
This is a high speed video (x5k) showing atomisation or nebulisation of 3μL water droplet induced by ZnO surface acoustic waves (from left side) at 11.6MHz. The atomisation is induced by sub-nanometre amplitudes of surface acoustic waves interacting with water droplet, causing capillary waves on droplet surfaces and ejecting tiny (pL or nL) droplets, forming a nano-volcano eruption. The video is not a composite and has not been enhanced.
The image(s) show the flow topology for a flat plate wing rotated 180 degrees about the mid chord. The experiment was conducted in a quiescent water tank, and the shear layer feeding vortices behind each plate edge is illuminated using a milk based dye and twin laser light sheets. Note: The images were taken with a Phantom M310 high speed camera, which has a monochrome 1280x800 pixel sensor. I therefore cannot provide any higher resolution or colour images.
This video shows sediment being fluidised due to basal overpressure. Water is pumped through a bed comprising two particle diameters (36 micron and 689 micron in 2:3 ratio; 20% of coarse particles dyed blue to aid visualisation). This models processes forming a sediment extrudite (e.g. sand volcanoes, blows or boils).
A 4000 frames per second Schlieren video of Starbug 1, which was featured in the popular BBC TV series "Red Dwarf". In several episodes the ship made planetary landings and we wanted to conclude if this was even remotely possible.