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Articles by Anna Zigelman
Condensed Matter > Soft Condensed Matter
Thermodynamic cycles are the foundation of energy conversion across natural and engineered systems, transforming heat into useful work. However, these cycles traditionally operate between fixed thermal reservoirs, restricting them to specific locations and temperature differences. Here, we introduce autonomous thermodynamic cycles enabled by robotic mobility and sensing, allowing robots to perform thermodynamic cycles by accessing spatially varying temperature fields.
Self-deploying reinforced concrete structures
Abstract Formwork for concrete construction remains one of the most resource-intensive, polluting, and constraining components of the construction sector, relying on prefabricated molds that demand extensive material, labor, and on-site preparation. We introduce a self-deploying formwork system based on multistable tubes that transform from a compact configuration to a full-scale structural mold with integrated steel reinforcement.
Dynamics of Purcell-type microswimmers with active-elastic joints
Purcell's planar three-link microswimmer is a classic model of swimming in low-Reynolds-number fluid, inspired by motion of flagellated microorganisms. Many works analyzed this model, assuming that the two joint angles are directly prescribed in phase-shifted periodic inputs. In this work, we study a more realistic scenario by considering an extension of this model which accounts for joints' elasticity and mechanical actuation of periodic torques so that the joint angles are dynamically evolving.
Multistable Metafluid Based Energy Harvesting and Storage
Research Article This article has been accepted for publication and undergone full peer review but has not been through the copyediting, typesetting, pagination and proofreading process, which may lead to differences between this version and the Version of Record. Please cite this article as https://doi.org/10.1002/adma.202301483 Abstract The thermodynamic properties of fluids play a crucial role in many engineering applications, particularly in the context of energy.
Flows in Straws: Viscous Flows in One-Dimensional Metamaterial
Abstract We propose to incorporate fluids within multistable metamaterials to tailor a desired dynamic response, dictate the magnitude of rate-dependent dissipation, control the sequence and pattern of phase transition, and more. As a simple example we focus on straws, which are commonly used to transfer fluids and are constructed from a one-dimensional (1D) lattice of bistable elements.
Effect of the Cassie state in grooved channels on one-dimensional sound waves
Abstract Previous experiments and analyses have demonstrated that elastic boundaries reduce the speed of sound and alter the acoustic waves in fluid-filled tubes. Similar effects will occur in any configuration with deformable boundaries and fluid-fluid interfaces. In this work, we study the propagation of nonlinear acoustic waves in 1D liquid-filled tubes with superhydrophobic longitudinal grooved boundaries.
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