Forces on bubbles and particles in rotating flows

Bubbles

The behavior of bubbles in rotating flows is determined by the effective forces acting on the bubble, like lift and drag forces. At the moment, for both the numerical simulations and the experiments, a rotating geometry is considered. For the experiments, a bubble is injected in a rotating horizontal cylinder, where it reaches an equilibrium position where all forces balance. From the position and the known forces, the lift and drag force can be determined. By doing DNS and assuming some of the forces to be known, others can be determined from the dynamical behavior of a bubble. The project is part of a research project with the goal to improve modeling of turbulent two-phase flows.


Figure 1:Typical bubble trajectory in a rotating cylinder.

Cylinders

Flow around rotating cylinders is of fundamental interest but also of great importance in many industrial applications, for example in flow control. We experimentally investigate the motion of a heavy cylinder in a drum filled with water, and rotating about a horizontal axis. The cylinder either co-rotates or counter-rotates with the rotating drum as shown in Figure 2 below. For the counter-rotation situation, the cylinder freely rotates without contact with the wall of the drum, due to the lift force acting on it.


Figure 2: The inner, freely rotating cylinder either co-rotates (left) or counter-rotates (right) with the drum, depending on the rotation speed of the drum.

The issues we address are:

Info: Detlef Lohse and Chao Sun

Researchers: Hanneke Bluemink, Yoshi Tagawa, Chao Sun, Andrea Prosperetti, Leen van Wijngaarden, Detlef Lohse.
Collaborators: Hans Kuipers (Twente), Jaap van der Vegt (Twente), Jacques Magnaudet (Toulouse), Tom Mullin (University of Manchester).
Partners: DSM, Shell, Akzo Nobel, Marin.
Sponsors: STW, FOM.

Publications

Drag and lift forces on a counter-rotating cylinder in rotating flow[arΧiv]
C. Sun, T. Mullin, L. van Wijngaarden, and D. Lohse
J. Fluid Mech. 664, 150–173 (2010)BibTeΧ
Drag and lift forces on particles in a rotating flow
J.J. Bluemink, D. Lohse, A. Prosperetti, and L. van Wijngaarden
J. Fluid Mech. 643, 1–31 (2009)BibTeΧ
A sphere in a uniformly rotating or shearing flow
J.J. Bluemink, D. Lohse, A. Prosperetti, and L. van Wijngaarden
J. Fluid Mech. 600, 201–233 (2008)BibTeΧ
Drag and lift forces on bubbles in a rotating flow
E.A. van Nierop, S. Luther, J.J. Bluemink, J. Magnaudet, A. Prosperetti, and D. Lohse
J. Fluid Mech. 571, 439–454 (2007)BibTeΧ
Asymmetry-induced particle drift in a rotating flow
J.J. Bluemink, E.A. van Nierop, S. Luther, N.G. Deen, J. Magnaudet, A. Prosperetti, and D. Lohse
Phys. Fluids 17, 072106 (2005)BibTeΧ
Bubble puzzles
D. Lohse
Nonlinear Phenomena in Complex Systems 9, 125 (2006)BibTeΧ
Controlling bubbles
D. Lohse and A. Prosperetti
J. Phys.: Condens. Matter 15, S415 (2002)BibTeΧ
Spiraling Bubbles: How Acoustic and Hydrodynamic Forces Compete
J. Rensen, D. Bosman, J. Magnaudet, C.D. Ohl, A. Prosperetti, R. Tögel, M. Versluis, and D. Lohse
Phys. Rev. Lett. 86, 4819–4822 (2001)BibTeΧ


Rayleigh Benard convection conference 2018 rbc2018
Max Planck Gesellschaft
MCEC
Twente
Centre for Scientific Computing
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