Location: D. Dan and Betty Kahn Building, Room 217
Acoustic levitation (AL) is a technique that employs ultrasonic sound waves to suspend and manipulate small objects in mid-air at specific locations. This method leverages a nonlinear phenomenon called acoustic radiation forces (ARF), which arise from a high-intensity acoustic field....
Location: D. Dan and Betty Kahn Building, Room 217
The Applied Thermal Engineering Laboratory at the Guangdong Technion – Israel Institute of Technology was established in 2022 with the main goal of studying energy conversion in fuel-consuming equipment and the associated problems in thermodynamics, heat and mass transfer, and...
Location: D. Dan and Betty Kahn Building, Room 217
As the need for sustainable, high-performance materials grows, creating eco-friendly alternatives to traditional composites has become increasingly critical. Renewable biomaterials, including bioplastics and natural fibers, offer a promising pathway toward sustainability. However, their incorporation in composites typically necessitates high-energy processing...
Location: D. Dan and Betty Kahn Building, Room 217
Variation bounding, i.e., preventing an increase of zero-crossings or local extrema is an elementary property that we often expect from tools in signal processing, statistics, geometric modelling or approximation theory. The old and well-established theory behind this concept, however, has...
Location: D. Dan and Betty Kahn Building, Room 217
The problem of escape attracted a lot of attention over an extended period of time. Recently, the analytic approach towards this sort of problem had been suggested in the context of the primary 1:1 resonance. The effect of the secondary...
Location: Solid-State Institute, Auditorium, entrance floor
Photoluminescence (PL) is a fundamental light-matter interaction where absorbed photons are re-emitted, playing a major role in optoelectronics, energy harvesting, and spectroscopy. This talk explores the temperature-dependent evolution of PL, exploiting the tools of optics and thermodynamics. A key focus...
Location: D. Dan and Betty Kahn Building, Room 217
Impinging jets are widely used as a cooling technique in various industrial applications due to their high heat transfer coefficients and simple setup. Co-axial jets, which are comprised of an inner round jet and a surrounding annular jet, introduce additional...
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Urban canopies, with their heterogeneous heights, exhibit complex flow phenomena essential for understanding urban airflow dynamics. Our study employs implicit large eddy simulations (ILES) using the flux reconstruction method and the artificial compressibility approach in the PyFR open-source library. These...
Location: D. Dan and Betty Kahn Building, Room 217
Gas-assisted atomization of a liquid jet into a spray of small droplets is used in many industrial applications. The breakup of the liquid jet is the result of a series of instabilities. Shear-induced Kelvin-Helmholtz (KH) instabilities give rise to liquid...
Location: D. Dan and Betty Kahn Building, Room 217
Cryogenics is the science of producing and maintaining cold power at very low temperatures. The practical products of cryogenics are closed-cycle refrigerators, or "Cryocoolers" in short. There are several types of cryocoolers, the most common being the Stirling type cryocooler....
Location: D. Dan and Betty Kahn Building, Room 217
We identify the existence of nonlinear thermo-visco-elastic damping in conductive metallic nanowires that are subject to magnetic excitation and investigate its effects on the spatiotemporal dynamical system response. We derive a consistent continuum-based modal dynamical system for a geometrically nonlinear...
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Effective robotic manipulation requires adaptability to varied objects and dynamic settings. Traditional rigid hands, while accurate, face limitations in cost, fragility, and control complexity. Underactuated, compliant hands offer a simpler, more adaptable alternative but introduce uncertainties in hand-object interactions. This...
Location: D. Dan and Betty Kahn Building, Room 217
In addition to a common synchronization and/or localization behavior, a system of linearly coupled identical bistable Van der Pol (BVdP) oscillators can exhibit a "non-conventional" or "modal" synchronization. In the two-DOF case, one can observe stable beatings attractor with synchronized...
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This seminar presents a detailed thermomechanical comparison between fatigue pre-cracked and sharp-notched Ti-6Al-4V specimens under dynamic mode II loading. Using a single-point impact experiment, the response of these specimens was investigated through synchronized high-speed thermal and visual imaging. Frictional heating...
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The statistical supervised learning framework assumes an input-output set with a joint probability distribution that is reliably represented by the training dataset. The learner is then required to output a prediction rule learned from the training dataset. Unfortunately, most supervised...
Location: D. Dan and Betty Kahn Building , Room 217
The study of fluid-solid multiphase flows, characterized by the suspension of small solid particles within turbulent carrier fluids, is of significant relevance in both industrial and environmental contexts. Such flows are commonly encountered in processes such as papermaking, fuel combustion,...
Location: D. Dan and Betty Kahn Building, Room 217
Optical elements require well-defined surface topography of high quality. The production of such smooth, curved surfaces, particularly at the microscale, is challenging for most traditional fabrication methods. Liquids, owing to their natural smoothness, are excellent candidates for creating such smooth...
Location: D. Dan and Betty Kahn Building, Room 217
Every heartbeat is initiated by an action potential (AP) that originates in the sinoatrial node and travels through the heart. It triggers a subsequent calcium release from the sarcoplasmic reticulum, initiating contraction of the cardiac cell. The electrical, calcium and...
Location: D. Dan and Betty Kahn Building, Room 217
In recent years, the field of nonlinear lattices has accumulated significant attention. Those structures present an intriguing combination of discreteness and nonlinear effects, leading to the development of a range of applications, such as energy harvesters, shock absorbers, vibration mitigation,...
Location: D. Dan and Betty Kahn Building, Room 217
Vapor transfer in porous media is an important phenomenon relevant to applications such as natural gas exploration, mining, water vapor transport through soil layers, leakage detection, and forensics. In this study, buried or concealed sublimating materials enclosed within porous mediums...
Location: D. Dan and Betty Kahn Building, Room 217
A gyroscope is a device used for measuring rates of rotation or for tracking orientation in space. State-of-the-art Micro-Electro-Mechanical-Systems (MEMS) gyroscopes are integrated in many smartphones, where they are used to measure orientation. The simplest and most common type of...
Location: on-line
Direct-bandgap transition metal dichalcogenide (TMD) monolayers are appealing candidates to construct atomic-scale spin-optical light sources owing to their unique valley-contrasting optical selection rules. Here, the photonic Rashba effect is manifested as a spin-split dispersion in momentum space, which provides the...
Location: D. Dan and Betty Kahn Building, Room 217
Shape memory alloys (SMA) are a subgroup of active materials, which have unique thermo-mechanical response. SMA exhibits two primary characteristics - Shape Memory effect (SME) and superelasticity (SE). The former refers to materials which can deform and return to their...
Location: D. Dan and Betty Kahn Building, Room 217
Multi-stable devices are systems that have multiple different stable equilibrium states. This behavior results from the nonlinearity of the system. Multi-stable MEMS devices are used in many applications and are realized using various operating principles such as geometric structure nonlinearity...
Location: D. Dan and Betty Kahn Building, Room 217
This study explores the feasibility of a tunable vibration damper utilizing the electro-rheological (ER) effect to optimize dissipation in oscillating systems. The investigation encompasses both modeling approaches and experimental methods to delve into the ER effect. A specific ER fluid...
Location: D. Dan and Betty Kahn Building, Room 217
This research considers the fundamental frequency of cantilever beams. The study includes new insight on the free vibrations of a simple elastic beam, and an analysis of the steady vibration response of piezoelectric vibrating energy harvester (PVEH) cantilever unimorphs. Vibrating...
Location: D. Dan and Betty Kahn Building, Room 217
In the world of Kayaking, a significant portion of steering and balancing relies on the paddler’s feet. However, individuals with different disabilities, such as impaired muscle power, limb deficiency, or impaired passive range of movement, face challenges as they cannot...
Location: D. Dan and Betty Kahn Building, Room 217
The non-elastic mechanical response of most materials occurs through impulsive and discrete events known as avalanches, which arise when a microscopic local region rapidly deforms, leading to a macroscopic strain change. Due to their transient nature and small spatial and...
Location: D. Dan and Betty Kahn Building, Room 217
In recent years, 3D printing has become a game changing method for millimeter and centimeter scale prototyping. However, its adoption for microfabrication processes in MEMS and transducer applications remains limited. A primary challenge hindering the relevance of additive manufacturing in...
Location: D. Dan and Betty Kahn Building, Room 217
This research concerns the mechanical behavior and failure of pig rib bones in order to find a correlation between the failure region(s) and the morphological characteristics. The rib is specifically selected due to the clear separation between the cortical (outer,...
Location: D. Dan and Betty Kahn Building, Room 217
The inverse kinematics (IK) of redundant robotic manipulators can be particularly challenging to solve algebraically, especially when dealing with uncertain information about the manipulator link lengths or target location. Potential functions offer a method to obtain numerical solutions for various...
Location: D. Dan and Betty Kahn Building, Room 217
Additively manufactured lattice structures are porous light-weight structures with mechanical properties that are dictated both from the topology and the parent material properties. These light-weight structures are attracting attention in various application in various field of engineering, and among their...
Location: D. Dan and Betty Kahn Building, Auditorium 1
Accurate simulations of high-speed flows require high-resolution numerical algorithms. This study developed a class of new high-order numerical schemes and a GPU-accelerated solver to solve the compressible Navier-Stokes equations on curvilinear geometries, including dynamically deforming meshes. Schemes of 4th and...
Location: D. Dan and Betty Kahn Building, Room 217
The Transient Fluid Mechanics Laboratory was established three years ago with the goal of studying complex transient phenomena in fluid mechanics. Our primary focus has been to explore intricate fluid dynamics using cutting-edge experimental techniques and advanced data processing methods....
Location: D. Dan and Betty Kahn Building, Room 217
The Technion Internal Combustion Engines Lab has previously developed a Combined Electro-Thermo-Chemical Cycle (CETC), which is an innovative hybrid propulsion cycle comprising a solid-oxide fuel cell (SOFC), an internal combustion engine (ICE), and a reformer for thermochemical recuperation of waste...
Location: D. Dan and Betty Kahn Building, Room 217
Fixed-wing aircraft stall – characterized by a sudden loss of lift – is still a prevalent problem in general aviation, accounting for 36% of loss-of-control accidents and more than 40% of all fatalities. Several wind tunnel studies have demonstrated stall-control...
Location: D. Dan and Betty Kahn Building Room 217
The Twistcar is an underactuated toy vehicle composed of two segments: a primary segment on which the child sits, and a secondary segment on which the steering wheel is mounted. Each segment has an axle with wheels. This vehicle is...
Location: D. Dan and Betty Kahn Building, Room 217
Stochastic nanoporous gold (NPG) structures gained significant interest in the research community due to their advantages as a lightweight structure with a high surface-to-volume ratio. These properties underscore the importance of optimizing and tailoring the mechanical properties of NPG structures...
Location: D. Dan and Betty Kahn Building, Room 217
Permanent creases on thin-walled objects are imprinted lines on which there is local plastic deformation. Geometrically constrained creases are often leveraged as multi-stable elements with applications in various fields, including robotic actuators, energy storage and release, and meta-materials. Using curved...
Location: D. Dan and Betty Kahn Building , Room 217
The talk will cover the following three main topics associated with the acceleration-driven hydrodynamic instabilities and their suppression by elastic forces: Atomization in forensic applications. Reopening dentistry after COVID-19. Liquid films (cavities) subject to pressure difference in the surrounding gas...
Location: D. Dan and Betty Kahn Building, Room 217
My research focused on networks of bistable elements. In the first part of the seminar, I will present an investigation into the fundamental physics of viscous flow injected into a bistable hyperelastic chamber. We examine the mechanics of viscous flow...
Location: D. Dan and Betty Kahn Building, Room 217
Underactuated wheeled vehicles are commonly studied as nonholonomic systems with periodic actuation.Twistcar is a classic example inspired by a riding toy, which has been analyzed using a planar model of a dynamical system with nonholonomic constraints. Prior analytical investigations of...
Location: D. Dan and Betty Kahn Building , Room 217
Theoretical characterization and control of transient, resonant responses of many real mechanical systems encounter significant challenges due to their essential nonlinearity. Strong nonlinearity manifests in systems with intermittently interacting components such as granular materials, structures with breathing cracks, interlocking materials,...
Location: D. Dan and Betty Kahn Building, Room 217
Methyl cellulose (MC) is a unique material that displays a liquid-solid phase transition when heated. Methyl cellulose is a biocompatible material and it is FDA approved. The manufacturing process of the gel is cheap and it is widely used in...
