Results 81 to 90 of about 117,422 (348)

Design of a Reconfigurable Microfluidic System Enabled by Magnetic Miniature Robots

Advanced Intelligent Systems, EarlyView.
Magnetic miniature robots are integrated into microfluidic chips to achieve real‐time reconfiguration. By external magnetic actuation, the robots perform sorting, mixing, flow regulation, and bubble removal on demand. This versatile platform eliminates the need for complex on‐chip hardware and enables adaptive control for biological and chemical ...
Yuanhe Chen, Zichen Xu, Yu Sun, Qingsong Xu   +3 more
wiley   +1 more source

Comparison of numerical results of linear and nonlinear turbulence models based on the rans approach [PDF]

E3S Web of Conferences
This paper considers one of the urgent problems of modern physics — numerical solution of turbulent flows, which play a key role in various fields of science and technology, including aerodynamics, hydrodynamics and heat transfer processes.
Madaliev Murodil, Yunusaliev Elmurad, Abdulkhaev Zokhidjon, Otakulov Bakhromjon, Yusupov Sardorbek, Ergashev Ilhom, Tohirov Islomjon   +6 more
doaj   +1 more source

Turbulence energetics in stably stratified geophysical flows: strong and weak mixing regimes

, 2008
Traditionally, turbulence energetics is characterized by turbulent kinetic energy (TKE) and modelled using solely the TKE budget equation. In stable stratification, TKE is generated by the velocity shear and expended through viscous dissipation and work ...
Abarbanel, Abarbanel, Bange, Canuto, Canuto, Canuto, Chandrasekhar, Cheng, Churchill, Dalaudier, Elperin, Esau, Galperin, Hanazaki, Hanazaki, Hansen, Holloway, Hunt, Jin, Kaimal, Keller, Kim, Kolmogorov, Lawrence, Lilly, Lorenz, Lorenz, Luyten, Mahrt, Mauritsen, Mauritsen, Miles, Miles, Monin, Monin, Monti, Nappo, Ohya, Phillips, Phillips, Polyakov, Poulos, Prandtl, Rehmann, Rehmann, Richardson, Schumann, Smedman, Strang, Taylor, Tennekes, Turner, Umlauf, Uttal, Zilitinkevich, Zilitinkevich   +55 more
core   +1 more source

Microfluidic Mixing with the Dynamic Control of Magnetic Actuation

Advanced Intelligent Systems, EarlyView.
Schematic illustration and flow field visualization of magnetically actuated L‐shaped microrobots displaying cooperative vortex generation for enhanced microscale mixing. The left side shows the electromagnetic actuation setup, which enables programmable control of rotational direction and frequency.
Prashant Kishor Sharma, Tsung‐Yen Lu, Chia‐Yuan Chen   +2 more
wiley   +1 more source

Evaluation of a Buoyancy and Shear Based Mixing Length for a Turbulence Scheme

Frontiers in Earth Science, 2017
We present a new diagnostic mixing length for a turbulence scheme based on a prognostic equation for the turbulence kinetic energy. The formulation adds a local vertical wind shear term to the non-local buoyancy-based mixing length currently used in the ...
Quentin Rodier, Valéry Masson, Fleur Couvreux, Alexandre Paci   +3 more
doaj   +1 more source

Understanding the sub-critical transition to turbulence in wall flows [PDF]

, 2008
Contrasting with free shear flows presenting velocity profiles with inflection points which cascade to turbulence in a relatively mild way, wall bounded flows are deprived of (inertial) instability modes at low Reynolds numbers and become turbulent in a ...
Manneville, Paul
core   +3 more sources

A Novel Milli‐Scale Magnetic Robot Exploiting Rotation for Controlled Magnetic Particles Release

Advanced Intelligent Systems, EarlyView.
Delivering magnetic particles can become a game changer in minimally invasive medicine. To cope with this challenge, a magnetically actuated milli‐scale carrier leveraging rotation to perform on‐demand tunable release of magnetic particles across multiple release events is presented.
Giordano De Angelis, Tamerlan Srymbetov, Arianna Menciassi, Veronica Iacovacci   +3 more
wiley   +1 more source

Theory of x-ray photon correlation spectroscopy for multiscale flows

Physical Review Research
Complex multiscale flows associated with instabilities and turbulence are commonly induced under high-energy density (HED) conditions, but accurate measurement of their transport properties has been challenging.
Hao Yin, Charles Heaton, Eric G. Blackman, Arianna E. Gleason, Joshua J. Turner, Gilbert W. Collins, Gianluca Gregori, Jessica K. Shang, Hussein Aluie   +8 more
doaj   +1 more source

Enhancement of small-scale turbulent dynamo by large-scale shear

, 2017
Small-scale dynamos are ubiquitous in a broad range of turbulent flows with large-scale shear, ranging from solar and galactic magnetism to accretion disks, cosmology and structure formation.
Brandenburg, Axel, Rogachevskii, Igor, Singh, Nishant K.   +2 more
core   +1 more source

Buoyancy‐Driven Micropolar Fluid Flow Transport in Porous Media With Variable Heat Source and Convective Heating

Asia-Pacific Journal of Chemical Engineering, EarlyView.
ABSTRACT The objective of the current research is to characterize the thermal performance in micropolar fluid flows on a vertically elongated porous sheet in the presence of buoyancy forces. Thus, the motivation of this study is to improve the understanding of buoyancy‐driven micropolar fluid flows through porous media, which are relevant to advanced ...
T. Venu, MD. Shamshuddin, S. O. Salawu
wiley   +1 more source