46. Compaction of granular mixture
F. Ludwig, N. Vandewalle, and S. Dorbolo
Granular Matter 8 (2006), 87-91.
Result: Toy model...for binary mixtures.
Story: Work has never looked like Game in that way since then.
47. Precursor of avalanches in a granular monolayer
T. Scheller, C. Huss, S. Dorbolo, and N. Vandewalle
Physical Review E 74 (2006) 031311 (5 pages)
Result: When a monolayer of beads is inclined starting from the horizontal position, reorganisations induce compaction... and this by a succession of steps.
Story: Tom asks to Claude some help for modelling. We always need a mathematician around.
48. Dancing droplets onto liquid surfaces
N. Vandewalle, D. Terwagne, K. Mulleners, T. Gilet, and S. Dorbolo
Physics of Fluids 18, (2006) 091106 (1 page)
Result: Poesy of bouncing.
Story: This movie won Gallery of fluid motion 2006, DFD Long Beach, CA, USA.
49. Vitas Brevis of antibubbles
S. Dorbolo, N. Vandewalle, E. Reyssat, and D. Quéré
Euophysics News 37 (2006), 24-25.
Result: About the lifetime of antibubble...
Story: It is always a pleasure to make the promotion of the antibubbles.
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50. Critical parameters for the droplet cascade of coalescence
T. Gilet, K. Mulleners, JP Lecomte, N. Vandewalle, and S. Dorbolo
Physical Review E 75 (2007), 036303 (14 pages)
Result: Coalescence of a droplet with a planar interface of the same liquid was studied. The surrounding liquid was changed. The viscosity of both phases intervene... but not symmetrically.
Story: Karin was a short term researcher and accumulated a large number of data. It took pretty long time for analysis. Jean-Paul from Dow Corning showed us that there are several points of view of such a system.
51. Some aspects of electrical conduction in granular systems of various dimensions
M. Creyssels, S. Dorbolo, A. Merlen, C. Laroche, B. Castaing, and E. Falcon
Europhysics Journal E 23 (2007), 255-264.
Result: Electrical conductivity of granular matter... a review.
Story: Matthieu gathers a lot of information from our different researches. The picture (here aside) is one of the most wonderful in my opinion and was made by ... Mister Claude Laroche. I invite you to read the paper just for this.
52. Stationary states in 1D system of inelastic particles
O.I. Gerasimov, N. Vandewalle, A. Spivak, N. Khudyntsev, G. Lumay, S. Dorbolo, and O. Klymenkov
Ukrainian Journal of Physics (2007), 991-997.
Result: Tapping periodically a vertical column allows to fluidized it. The mean space occupied by the beads is uniformly distributed.
Story: Final version in 2013....
53. Effects of electromagnetic waves on the electrical properties of contacts between grains
S. Dorbolo, A. Merlen, M. Creyssels, N. Vandewalle, B. Castaing, and E. Falcon,
Europhysics Letters 79 (2007), 54001 (5 pages).
Result: The enhancement of contacts between granular beads due to the impact of an electromagnetic wave was measured. Bad contacts becomes good.
Story: Alexandre came in Liege to finish the measurements. It was a great pleasure to have him here.
54. Controlling the partial coalescence of a droplet onto a vertically vibrated bath
T. Gilet, N. Vandewalle, and S. Dorbolo
Physical Review E 76 (2007), 035302R (4 pages).
Result: Partial coalescence on a vibrated bath. When droplets coalesce that may become so large that they cannot bounce anymore.
Story: The mix of two of our favourite subjects.
55. Lifetime of a bouncing droplet
D. Terwagne, N. Vandewalle, and S. Dorbolo
Physical Review E 76 (2007), 056311 (6 pages).
Result: Large droplets does not live for ever on a vibrated bath.
Story: Denis invented a lifetimisator that allows to measure the lifetime of 9 droplets in the same time. Why 9? Because a numerical keyboard has 9 keys.
​
56. Dynamics of a bouncing droplet onto a vertically vibrated interface
T. Gilet, D. Terwagne, N. Vandewalle, and S. Dorbolo
Physical Review Letters 100 (2008), 167802 (4 pages)
Result: Model for the bouncing threshold with respect to the oil viscosity.
Story: Collaboration between the two PhD Students and future Professors.
57. Energetic approach for the characterization of taps in granular compaction
F. Ludewig, S. Dorbolo, T. Gilet, and N. Vandewalle
Europhysics Letters 84 (2008), 44001 (6 pages)
Result: The reduced acceleration is shown to be not the right parameter. Energy injected at each tap is relevant.
Story: François succeeded in modelling a tap.
58. Resonant and rolling droplet
S. Dorbolo, D. Terwagne, N. Vandewalle, and T. Gilet
New Journal of Physics 10 (2008) 113021 (9 pages)
Result: The bouncing threshold depends on the frequency and on the viscosity. For low viscosities, high frequency modes can be excited.
Story: Very noisy experiments. Ask to our neighbours.
59. From bouncing to boxing
D. Terwagne, T. Gilet, N. Vandewalle, and S. Dorbolo
Chaos 18 (2008), 041104 (1 page)
Result: What beyond the threshold? Period doubling and... chaos
Story: This movie won Gallery of Non Linear Physics @ APS March meeting, New Orleans.
60. A drop of spectroscopy
D. Terwagne, T. Gilet, N. Vandewalle, and S. Dorbolo
Physicalia 30 (2008), 161-168
Result: see above
Story: Cover of Physicalia. Priceless.
​
61. Bouncing trimer
S. Dorbolo, F. Ludewig, and N. Vandewalle
New Journal of Physics 11 (2009), 033016 (22 pages)
Result: Bifurcation diagrams of a trimer that bounces on periodically excited plate were measured. Spontaneous rotation and Period-3 orbit was observed.
Story: Following dimers... why not trimer?
62. Antibubbles, liquid onions and bouncing droplets
N. Vandewalle, D. Terwagne, T. Gilet, H. Caps, and S. Dorbolo
Colloids and Surface A : Physicochemical and Engineering Aspects 344 (2009) 42-47.
Result: Résumé of several works! The droplet as we observe it.
Story: -
63. Metastable bouncing droplets
D. Terwagne, T. Gilet, N. Vandewalle, and S. Dorbolo
Physics of Fluids 21 (2009) 054103 (5 pages)
Result: The bouncing threshold is finely analysed. The droplet may temporary bounce below the acceleration threshold. Interference fringes recorded below the droplet allowed to express the air film thinning with time.
Story: How many droplets have been measured for this? 1000?
64 Completely inelastic bouncing ball
T. Gilet, N. Vandewalle, and S. Dorbolo
Physical Review E (R) 79 (2009) 066201 (4 pages)
Result: The completely inelastic bouncing ball has been investigated in detailed. This is the basis of any bouncing dynamics.
Story: Tristan wanted to know why and how this can bounce.
65. Dynamics of the bouncing trimer
S. Dorbolo, F. Ludewig, and N. Vandewalle
First International Colloqium on Nonlinear Dynamics of Deep Drilling Systems, Proceedings (V. Denoël and E. Detournay), 45-48
Result: see above.
Story: -
66. Characterization of tap intensity for granular compaction
F. Ludewig, S. Dorbolo, and N. Vandewalle
AIP Conference Proceedings, 477-80 (2009)
Result: The reduced acceleration is shown to be not the right parameter. Energy injected at each tap is relevant.
Story: About the difficulty to change minds.
67. Compaction dynamics of a magnetized powder
G. Lumay, S. Dorbolo, and N. Vandewalle
Physical Review E80 (2009), 041302 (6 pages)
Result: A packing of magnetized beads. How to reach low volume fraction using a magnetic field? Keywords: hysteresis, induced cohesion.
Story: -
68. Hybrid wetting state of micro-waffle textures
H. Caps, D. Vandormael, J. Loicq, S. Dorbolo, and N. Vandewalle
Europhysics Letters 88 (2009), 16002 (4 pages)
Result: Inverse of Fakir effect. Instead of bumps, we have holes.
Story: A nice collaboration with CSL.
69. The mayonnaise droplet
Terwagne, N. Mack, S. Dorbolo, T. Gilet, J-Y Raty, and N. Vandewalle
Chaos 19 (2009) 041105 (1 page)
Result: see above
Story: This movie won Gallery of Non Linear Physics @ APS March meeting, Pittsburgh.
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70. Double emulsion in a compound droplet
D. Terwagne, T. Gilet, N. Vandewalle, and S. Dorbolo
Colloids and Surfaces A: Physicochemical and Engineering Aspects 365 (2010) 178-180.
Result: When a bi-compound droplet (oil+water) rebounds on a bath, the oil of the core shell enters the inner water droplet. A double emulsion is then observed.
Story: Denis likes cooking...
71. Antibubble lifetime: Influence of the bulk viscosity and of the surface modulus of the mixture
S. Dorbolo, D. Terwagne, R. Delhalle, J. Dujardin, N. Huet, N. Vandewalle, and N. Denkov
Colloids and Surfaces A: Physicochemical and Engineering Aspects 365 (2010) 43-45.
Result: The lifetime of an antibubble doubles when fatty acid is added to a surfactant mixture. This reveals a link between the surface viscosity and the lifetime of the antibubble.
Story: A student’s project that results into a publication.
72. From a bouncing compound drop to a double emulsion
D. Terwagne, T. Gilet, N. Vandewalle, and S. Dorbolo
Langmuir 26 (2010) 11680-11685.
Result: Experimental conditions to obtain a double emulsion in a bouncing droplets are carefully analysed. The We number is critical.
Story: Very complete paper by Denis. Probably the best of his PhD student career.
73. Faraday instability network
G. Delon, D. Terwagne, N. Adami, A. Bronfort, N. Vandewalle, S. Dorbolo, and N. Vandewalle
Chaos 20 (2010) 041103 (1 page)
Result: Faraday waves are triggered in compartimentised vessel. The Faraday waves synchronise.
Story: This movie won Gallery of Non Linear Physics @ APS March meeting 2010, Portland.