Results 61 to 70 of about 11,990 (249)
On the self-propulsion of an -sphere micro-robot [PDF]
Journal of Fluid Mechanics, 2013 AbstractThe aim of this paper is to describe the self-propulsion of a micro-robot (or micro-swimmer) consisting of $N$ spheres moving along a fixed line. The spheres are linked to each other by arms with their lengths changing periodically. We use the asymptotic procedure containing the two-timing method and a distinguished limit.
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Advanced Engineering Materials, EarlyView.The present study investigates recycling of NiTi shape memory alloys via vacuum induction melting. An ingot was synthesized from elemental Ni and Ti and subjected to three subsequent remelting cycles. Remelting increases process durations and impurity levels and adversely affects microstructures and functional properties.
Sakia Sophia Noorzayee +7 more
wiley +1 more source
Current Status and Challenges in Data Collection for Aerospace Coatings Deposited by Plasma Spraying
Advanced Engineering Materials, EarlyView.An innovative approach has been integrated into the GRENAT project to optimize plasma spraying and coating performance. Raw materials are accelerated and melted in the plasma generated by torches, creating coatings. Monitoring sensors collect process data which are combined with ex situ characterization data.
Lila Randriamananjara +8 more
wiley +1 more source
Rotor-System Log-Decrement Identification Using Short-Time Fourier-Transform Filter
International Journal of Rotating Machinery, 2015 With the increase of the centrifugal compressor capability, such as large scale LNG and CO2 reinjection, the stability margin evaluation is crucial to assure the compressor work in the designed operating conditions in field.
Qihang Li +3 more
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Zhongguo Jianchuan Yanjiu, 2022 ObjectivesAiming at the replacement of propellers behind surface ships with pumpjet propulsion systems, this paper introduces a novel method for predicting full-scale power performance based on statistical learning.
Qiongfang YANG +5 more
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Cooperative self-propulsion of active and passive rotors [PDF]
Soft Matter, 2012 Using minimal models for low Reynolds number passive and active rotors in a fluid, we characterize the hydrodynamic interactions among rotors and the resulting dynamics of a pair of interacting rotors. This allows us to treat in a common framework passive or externally driven rotors, such as magnetic colloids driven by a rotating magnetic field, and ...
Fily, Yaouen +2 more
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Advanced Engineering Materials, EarlyView.Coarse‐grained (left) and atomistic (right) models of the shape memory polymer ESTANE ETE 75DT3 are shown schematically. The two representations bridge molecular detail and mesoscopic description. Both models capture shape memory behavior, linking segmental mobility and conformational relaxation of anisotropic chains to macroscopic recovery, and ...
Fathollah Varnik
wiley +1 more source
Janus particle microshuttle: 1D directional self-propulsion modulated by AC electrical field
AIP Advances, 2014 A catalytic Janus particle is capable of gaining energy from the surrounding fuel solution to drive itself to move continuously, which has an important impact in different fields, especially the field of micro-systems.
Jiliang Chen +3 more
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Geometric Visualization of Self-Propulsion in a Complex Medium
Physical Review Letters, 2013 4 pages, 5 figures, published in Physical Review Letters ...
Hatton, Ross L. +3 more
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Turbulence in active fluids caused by self-propulsion [PDF]
Asymptotic Analysis, 2019 A rigorous analytical justification of turbulence observed in active fluids and caused by self-propulsion is presented. We prove existence of unstable wave modes for the generalized Stokes and Navier–Stokes systems by developing an approach in spaces of Fourier transformed Radon measures.
Christiane Bui +2 more
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