P.‐T. Brun
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View article: Augmented snap-through instability of folded strips
Augmented snap-through instability of folded strips Open
Bistability and snap-through instabilities are central to various mechanisms in nature and engineering, enabling rapid movement and significant shape changes with minimal energy input. These phenomena are readily demonstrated by bending an…
View article: Morpho-plastic cellular metamaterials
Morpho-plastic cellular metamaterials Open
Deployable structures, essential across various engineering applications ranging from umbrellas to satellites, are evolving to include soft, morphable designs where geometry drives transformation. However, a major challenge for soft materi…
View article: Liquid lace: Regular pattern formation by under-extrusion
Liquid lace: Regular pattern formation by under-extrusion Open
This paper is associated with a video winner of the 2023 American Physical Society's Division of Fluid Dynamics (DFD) Milton van Dyke Award for work presented at the DFD Gallery of Fluid Motion. The original video is available online at th…
View article: Stacked Rayleigh-Taylor Instabilities Grow Drops into Soft Stalactitelike Structures
Stacked Rayleigh-Taylor Instabilities Grow Drops into Soft Stalactitelike Structures Open
The interplay between thin film hydrodynamics and solidification produces formidably intricate geophysical structures, such as stalactites and icicles, whose shape is a testimony of their long growth. In simpler settings, liquid films can …
View article: Emergent behaviors of buckling-driven elasto-active structures
Emergent behaviors of buckling-driven elasto-active structures Open
Active systems of self-propelled agents, e.g., birds, fish, and bacteria, can organize their collective motion into myriad autonomous behaviors. Ubiquitous in nature and across length scales, such phenomena are also amenable to artificial …
View article: Augmented snap-through instability of folded strips
Augmented snap-through instability of folded strips Open
Bistability and snap-through instabilities are central to various mechanisms in nature and engineering, enabling rapid movement and large shape changes with minimal energy input. These phenomena are easily demonstrated by bending a piece o…
View article: Emergent intelligence of buckling-driven elasto-active structures
Emergent intelligence of buckling-driven elasto-active structures Open
Active systems of self-propelled agents, e.g., birds, fish, and bacteria, can organize their collective motion into myriad autonomous behaviors. Ubiquitous in nature and across length scales, such phenomena are also amenable to artificial …
View article: Beaded metamaterials
Beaded metamaterials Open
From the pragmatic to the symbolic, textiles play a prominent role in some of the most demanding yet ubiquitous scenarios, such as covering the complex and dynamic geometries of the human body. Textiles are made by repeated manipulations o…
View article: Stacked Rayleigh-Taylor instabilities grow drops into soft stalactite-like structures
Stacked Rayleigh-Taylor instabilities grow drops into soft stalactite-like structures Open
The interplay between thin film hydrodynamics and solidification produces formidably intricate geophysical structures, such as stalactites and icicles, whose shape is a testimony of their long growth. In simpler settings, liquid films can …
View article: Soft Deployable Structures via Core-Shell Inflatables
Soft Deployable Structures via Core-Shell Inflatables Open
Deployable structures capable of significant geometric reconfigurations are ubiquitous in nature. While engineering contraptions typically comprise articulated rigid elements, soft structures that experience material growth for deployment …
View article: Instability mediated self-templating of drop crystals
Instability mediated self-templating of drop crystals Open
The breakup of liquid threads into droplets is prevalent in engineering and natural settings. While drop formation in these systems has a long-standing history, existing studies typically consider axisymmetric systems. Conversely, the phys…
View article: Gravity-driven coatings on curved substrates: a differential geometry\n approach
Gravity-driven coatings on curved substrates: a differential geometry\n approach Open
Although the drainage and spreading processes of thin liquid films on\nsubstrates have received growing attention during the last decades, the study\nof three-dimensional cases is limited to a few studies on flat and axisymmetric\nsubstrat…
View article: Drops on the Underside of a Slightly Inclined Wet Substrate Move Too Fast to Grow
Drops on the Underside of a Slightly Inclined Wet Substrate Move Too Fast to Grow Open
Pendant drops suspended on the underside of a wet substrate are known to accumulate fluid from the surrounding thin liquid film, a process that often results in dripping. The growth of such drops is hastened by their ability to translate o…
View article: Elastic amplification of the Rayleigh–Taylor instability in solidifying melts
Elastic amplification of the Rayleigh–Taylor instability in solidifying melts Open
Significance Patterns resulting from successive far-from-equilibrium processes are common in nature. Yet, they are challenging to investigate, model, and translate to engineering owing to their complexity coupled to fluctuating development…
View article: Marangoni flows drive the alignment of fibrillar cell-laden hydrogels
Marangoni flows drive the alignment of fibrillar cell-laden hydrogels Open
Cell-laden hydrogels can be engineered using evaporating droplets of collagen.
View article: Printing on liquid elastomers
Printing on liquid elastomers Open
We propose a robust fluid-mediated route for the rapid fabrication of soft elastomers architected with liquid inclusions. Our approach consists of printing water at the surface of an immiscible liquid elastomer bath, which subsequently cur…
View article: An unbounded approach to microfluidics using the Rayleigh–Plateau instability of viscous threads directly drawn in a bath
An unbounded approach to microfluidics using the Rayleigh–Plateau instability of viscous threads directly drawn in a bath Open
Significance Liquid jets break into droplets to minimize their surface area. This interfacial phenomenon is central to many engineering applications, e.g., microfluidics, exploiting the small size and monodispersity of instability-mediated…
View article: Curvature Regularization near Contacts with Stretched Elastic Tubes
Curvature Regularization near Contacts with Stretched Elastic Tubes Open
Inserting a rigid object into a soft elastic tube produces conformal contact between the two, resulting in contact lines. The curvature of the tube walls near these contact lines is often large and is typically regularized by the finite be…
View article: Particle size selection in capillary instability of locally heated coaxial fiber
Particle size selection in capillary instability of locally heated coaxial fiber Open
Harnessing fluidic instabilities to produce structures with robust and regular properties has recently emerged as a new fabrication paradigm. This is exemplified in the work of Gumennik et al. [Nat. Comm. 4:2216, DOI: 10.1038/ncomms3216, (…
View article: Microextrusion Printing Cell-Laden Networks of Type I Collagen with Patterned Anisotropy and Geometry
Microextrusion Printing Cell-Laden Networks of Type I Collagen with Patterned Anisotropy and Geometry Open
Type I collagen self-assembles into three-dimensional (3D) fibrous networks. These dynamic viscoelastic materials can be remodeled in response to mechanical and chemical cues to form anisotropic networks, the structure of which influences …
View article: Microextrusion printing cell-laden networks of type I collagen with patterned fiber alignment and geometry
Microextrusion printing cell-laden networks of type I collagen with patterned fiber alignment and geometry Open
Cell-laden networks of aligned type I collagen fibers are fabricated using 3D microextrusion printing of collagen-Matrigel inks.
View article: Solid structures generated by capillary instability in thin liquid films
Solid structures generated by capillary instability in thin liquid films Open
This paper is associated with a posterwinner of a 2017 APS/DFDMilton van DykeAward for work presented at the DFD Gallery of Fluid Motion. The original poster is available from the Gallery of Fluid Motion.
View article: The interaction of a walking droplet and a submerged pillar: From scattering to the logarithmic spiral
The interaction of a walking droplet and a submerged pillar: From scattering to the logarithmic spiral Open
Millimetric droplets may walk across the surface of a vibrating fluid bath, propelled forward by their own guiding or “pilot” wave field. We here consider the interaction of such walking droplets with a submerged circular pillar. While sim…
View article: Viscous entrainment on hairy surfaces
Viscous entrainment on hairy surfaces Open
Inspired by nectar-drinking bats, an experimental and theoretical study investigates viscous entrainment in hairy textures. The trapped liquid is modeled using a Darcy-Brinkmann-like approach and the drainage flow solution is derived. The …
View article: Viscous entrainment on hairy surfaces
Viscous entrainment on hairy surfaces Open
Nectar-drinking bats and honeybees have tongues covered with hairlike structures, enhancing their ability to take up viscous nectar by dipping. Using a combination of model experiments and theory, we explore the physical mechanisms that go…