# Flow of foam past an elliptical obstacle.

@article{Dollet2006FlowOF, title={Flow of foam past an elliptical obstacle.}, author={Benjamin Dollet and M{\'e}lanie Durth and François Graner}, journal={Physical review. E, Statistical, nonlinear, and soft matter physics}, year={2006}, volume={73 6 Pt 1}, pages={ 061404 } }

To investigate the link between discrete small-scale and continuous large scale mechanical properties of a foam, we observe its two-dimensional flow in a channel, around an elliptical obstacle. We measure the drag, lift, and torque acting on the ellipse versus the angle between its major axis and the flow direction. The drag increases with the spanwise dimension, in marked contrast with a square obstacle. The lift passes through a smooth extremum at an angle close to, but smaller than 45…

## 16 Citations

Elastoplastic flow of a foam around an obstacle.

- Physics, MathematicsPhysical review. E, Statistical, nonlinear, and soft matter physics
- 2011

It is shown that the drag force increases linearly with the cross section of an obstacles, and the lift on an asymmetric aerofoil-like shape is negative and increases with its arc length, mainly due to the pressure contribution.

Yield drag in a two-dimensional foam flow around a circular
obstacle: Effect of liquid fraction

- PhysicsThe European physical journal. E, Soft matter
- 2007

The yield drag of the foam, that is, the force exerted on the obstacle by the foam flowing at very low velocity, is linear over a large range of the ratio of obstacle to bubble size, and is independent of the channel width over alarge range.

Flow of foam through a convergent channel

- Engineering, PhysicsThe European physical journal. E, Soft matter
- 2015

Abstract.We study experimentally the flow of a foam confined as a bubble monolayer between two plates through a convergent channel. We quantify the velocity, the distribution and orientation of…

Local description of the two-dimensional flow of foam through a contraction

- Engineering
- 2010

The two-dimensional flow of a foam confined in a Hele–Shaw cell through a contraction is investigated. Its rheological features are quantified using image analysis, with measurements of the elastic…

Simulations of two-dimensional foam rheology: Localization in linear Couette flow and the interaction of settling discs

- EngineeringThe European physical journal. E, Soft matter
- 2008

Surface Evolver simulations of flowing two-dimensional foams are described and it is shown that in linear Couette flow the T1 s are localized in space, becoming more so as the polydispersity of the foam decreases.

Theoretical model of viscous friction inside steadily sheared foams and concentrated emulsions.

- Physics, EngineeringPhysical review. E, Statistical, nonlinear, and soft matter physics
- 2008

The new upgraded model predicts that the energy dissipation at the bubble or drop surface leads to power-law index n<1/2 , whereas the contribution of the surface forces leads to n> 1/2, which explains the rich variety of foam or emulsion behaviors observed upon steady shear.

Squeeze-flow and vane rheometry of a gas–liquid foam

- Engineering
- 2008

The rheology and slip of a dry shaving foam are investigated using squeeze-flow and rotating-vane methods. Constant-force squeeze flow between planar surfaces is used to study the effect of surface…

Simulating the interaction between a descending super-quadric solid object and a soap film

- PhysicsProceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences
- 2018

We investigate the interaction that occurs between a light solid object and a horizontal soap film of a ‘bamboo’ foam contained in a cylindrical tube. We vary the shape of the descending object from…

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Electronic address: b.dollet@utwente.nl; Present address: Physics of Fluids

- Electronic address: b.dollet@utwente.nl; Present address: Physics of Fluids