Results 51 to 60 of about 22,502 (309)

Transitions and probes in turbulent helium [PDF]

Physical Review E, 1997
Previous analysis of a Paris turbulence experiment \cite{zoc94,tab95} shows a transition at the Taylor Reynolds number $\rel \approx 700$. Here correlation function data is analyzed which gives further evidence for this transition. It is seen in both the power spectrum and in structure function measurements. Two possible explanations may be offered for
Emsellem, Virginie, Kadanoff, Leo P., Lohse, Detlef, Tabeling, Patrick, Wang, Z. Jane   +4 more
openaire   +2 more sources

A Super‐Adhesive Air Filter With Capillarity‐Mediated Spontaneous Particle Absorption via Dynamic Bond Exchange

Advanced Materials, EarlyView.
We address the inherently weak particle adhesion of conventional air filters by coating a dynamically crosslinked adhesive layer that delivers capillarity‐driven strong adhesion and particle absorption mediated by dynamic bond exchange. The resulting enhancement in particle adhesion enables efficient ultrafast (up to 20 m s−1) and omnidirectional ...
Junyong Park, Hyeri Jeon, Hyunwoong Park, Ji Min Lee, Yeomyung Yoon, Gyeong Hwan Choi, Sazzadul A. Rahat, Dong Wook Lee, Sohdam Jeong, Jonathan T. Pham, Chae Bin Kim, Sanghyuk Wooh   +11 more
wiley   +1 more source

Soft Hardware, Flowing Software: Reconfigurable Microfluidics for Adaptable Chemical Computation

Advanced Materials, EarlyView.
A reconfigurable microfluidic platform based on soft, photo‐printable, and chemically erasable hydrogel structures printed and erased in situ is used to control flow routing, mixing, chemical patterning, and even chemical computing. Using hardware to control chemical computations decouples logic function from molecular composition, demonstrated via ...
Piet J. M. Swinkels, Brigitta Dúzs, Oliver Skarsetz, Kohei Nishiyama, Andreas Walther   +4 more
wiley   +1 more source

Smagorinsky constant in LES modeling of anisotropic MHD turbulence

, 2008
Turbulent fluctuations in magnetohydrodynamic (MHD) flows can become strongly anisotropic or even quasi-2D under the action of an applied magnetic field. We investigate this phenomenon in the case of low magnetic Reynolds numbers.
Vorobev, Anatoliy, Zikanov, Oleg
core   +1 more source

Transient growth in the flow past a three-dimensional smooth roughness element [PDF]

, 2013
This work provides a global optimization analysis, looking for perturbations inducing the largest energy growth at a finite time in a boundary-layer flow in the presence of smooth three-dimensional roughness elements.
DE TULLIO, Marco, PASCAZIO, Giuseppe, DE PALMA, Pietro, CHERUBINI, Stefania, DE TULLIO, Marco Donato   +4 more
core   +1 more source

A Reproducible and Scalable Process for High Yield Mesenchymal Stromal Cell Extracellular Vesicles Production

Advanced Materials Technologies, EarlyView.
Mesenchymal stem cell derived extracellular vesicles (MSC‐EVs) are a promising therapeutic tool for regenerative medicine. However, the field lacks a reproducible high‐yield production method to answer the quantities needed for clinical translation.
Christophe Wong, Elise Madec, Jeanne Volatron, Max Piffoux, Amanda K. A. Silva, Florence Gazeau, Jean‐Philippe Herbeuval, Thibaut Fourniols   +7 more
wiley   +1 more source

Effect of the laminar separation bubble induced transition on the hydrodynamic performance of a hydrofoil [PDF]

, 2014
The authors thank the technical staff of IRENav for their contribution to the experimental set up.The present study deals with the effect of the laminar separation bubble (LSB) induced transition on the lift, drag and moment coefficients of a hydrofoil ...
DELAFIN, Pierre Luc, DENISET, François, DELAFIN, Pierre-Luc, Astolfi, Jacques-André, ASTOLFI, Jacques Andre   +4 more
core   +1 more source

Routes to turbulence in Taylor–Couette flow

, 2023
Fluid flows between rotating concentric cylinders exhibit two distinct routes to turbulence. In flows dominated by inner-cylinder rotation, a sequence of linear instabilities leads to temporally chaotic dynamics as the rotation speed is increased.
Avila, Kerstin, Burin, Michael J, Avila, Marc, Feldmann, Daniel, Borrero-Echeverry, Daniel   +4 more
core   +1 more source

Study on the turbulence transition in the pedestal of high-density H-mode plasmas in EAST

Nuclear Fusion
In the Experimental Advanced Superconducting Tokamak (EAST), a transition from electromagnetic to electrostatic turbulence is observed in the pedestal region as plasma density ramps up.
You Li, Ning Yan, Guosheng Xu, Ziqiang Zhou, Ganjun Zhang, Shaocheng Liu, Jilei Hou, Qingquan Yang, Kedong Li, Wenxiang Shi, Guangle Lin, Lin Yu, Yifeng Wang, Xiang Jian, Genfan Ding, Ran Chen, Yuqi Xu, Rui Ding, Jingsen Geng, Wenxue Fu, Qian Long, Panjun Tang, Yufei Zhang, Ang Ti, Haiqing Liu, Liang Wang, Qing Zang, Jinping Qian, the EAST Team   +28 more
doaj   +1 more source

Transition from the chaotic turbulence to the turbulent structures

Discrete Dynamics in Nature and Society, 1999
Weak turbulence, similar to incoherent light, may be represented as an ensemble of quasi-free quanta or Fourier harmonics. Unlike it, strongly turbulent state should be based on nonlinear structures.
A. Kingsep
doaj   +1 more source