Browsing Physics (Scholarly Publications) by Author "Weaire, Denis"
Now showing items 1-17 of 17
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2D foams above the jamming transition: Deformation matters
Hutzler, Stefan; Weaire, Denis; Moebius, Matthias (2017)Jammed soft matter systems are often modelled as dense packings of overlapping soft spheres, thus ignoring particle deformation. For 2D (and 3D) soft disks packings, close to the critical packing fraction ϕc, this results ... -
Buckling of a linear chain of hard spheres in a harmonic confining potential: Numerical and analytical results for low and high compression
Hutzler, Stefan; Weaire, Denis; Mughal, Adil; Irannezhad, Ali; Ryan-Purcell, John (2020)We extend a previous analysis of the buckling properties of a linear chain of hard spheres between hard walls under transverse harmonic confinement. Two regimes are distinguished—low compression, for which the entire chain ... -
Buckling of a tilted line of confined hard spheres
Hutzler, Stefan; Weaire, Denis (2022)A linear chain of hard spheres confined in a transverse harmonic potential is unstable and buckles, if tilted beyond some critical angle. We examine this symmetry breaking using a computational model that was previously ... -
Columnar structures of soft spheres: Metastability and hysteresis
Hutzler, Stefan; Weaire, Denis (2018) -
A continuum description of the buckling of a line of spheres in a transverse harmonic confining potential
Hutzler, Stefan; Weaire, Denis (2023)A line of contacting hard spheres, placed in a transverse confining potential, buckles under compression or when tilted away from the horizontal, once a critical tilt angle is exceeded. This interesting nonlinear problem ... -
The Crystal Structure of Bubbles in the Wet Foam Limit
Hutzler, Stefan; Weaire, Denis (2006)We have observed a rich variety of three-dimensional crystal and defect structures spontaneously formed by small (diameter 200 µm) bubbles in a wet foam. The observations confirm and extend those made by Bragg and Nye in ... -
Demonstration and interpretation of "scutoid" cells formed in a quasi-2D soap froth
Hutzler, Stefan; Weaire, Denis; Mughal, A.; Cox, S.J.; Burke, S.R. (2018)Recently a novel type of epithelial cell has been discovered and dubbed the ‘scutoid’. It is induced by curvature of the bounding surfaces. We show by simulations and experiments that such cells are to be found in a dry ... -
Description of the buckling of a chain of hard spheres in terms of Jacobi functions
Hutzler, Stefan; Weaire, Denis (2022)A linear chain of hard spheres, confined by a transverse harmonic potential, buckles under compression between two hard walls. Jacobi functions provide exact analytic solutions of a differential equation (related to the ... -
The energy of fcc and hcp foams
Hutzler, Stefan; Weaire, Denis (2020)We present Surface Evolver evaluations of the difference in energy between face-centred cubic (fcc) and hexagonal close-packed (hcp) foams in the usual idealized model, for liquid fractions ranging from the dry to the wet ... -
Equilibrium configurations of hard spheres in a cylindrical harmonic potential.
Hutzler, Stefan; Weaire, Denis; Winkelmann, J.; Mughal, A. (2019) -
Graphene-coated polymer foams as tuneable impact sensors
Coleman, Jonathan; Weaire, Denis; Boland, John (2018) -
Implementation of Morse-Witten theory for a polydisperse wet 2D foam simulation
Hutzler, Stefan; Weaire, Denis (Taylor & Francis, 2019-06)The Morse–Witten theory provides a formulation for the inter-bubble forces and corresponding deformations in a liquid foam, accurate in the limit of high liquid fraction. Here we show how the theory may be applied in ... -
Packing soft spheres: experimental demonstrations with hydrogels
Hutzler, Stefan; Weaire, Denis (2023)We describe a number of different experimental set-ups that use hydrogel spheres to demonstrate dense packings of deformable spheres in various geometries. The arrangements are similar to those of bubbles in foams, ... -
Physics in a small bedroom
Hutzler, Stefan; Weaire, Denis (Springer, 2022) -
A simple experimental system to illustrate the nonlinear properties of a linear chain under compression.
Hutzler, Stefan; Weaire, Denis (2020)A linear chain of spheres confined by a transverse harmonic potential experiences localized buckling under compression. We present simple experiments using gas bubbles in a liquid-filled tube to demonstrate this phenomenon. ... -
Stability maps for columnar structures
Hutzler, Stefan; Weaire, Denis (2023)We have previously explored the hysteresis and reversibility of transitions between ordered packings of soft spheres of diameter d in cylindrical channels of diameter D [A. Mughal, J. Winkelmann, D. Weaire, S. Hutzler, ... -
Theory of rotational columnar structures of soft spheres
Hutzler, Stefan; Weaire, Denis; Winkelmann, J.; Mughal, A.; Williams, D.B. (2019)There is a growing interest in cylindrical structures of hard and soft particles. A promising new method to assemble such structures has recently been introduced by Lee et al. [T. Lee, K. Gizynski, and B. Grzybowski, ...