Results 131 to 140 of about 117,422 (348)

The rise of fully turbulent flow

, 2015
Over a century of research into the origin of turbulence in wallbounded shear flows has resulted in a puzzling picture in which turbulence appears in a variety of different states competing with laminar background flow.
A Cros, A Lundbladh, AP Willis, B Eckhardt, B Hof, Baofang Song, Björn Hof, D Barkley, D Barkley, D Barkley, D Coles, D Coles, D Moxey, D Samanta, Dwight Barkley, G Kawahara, G Lemoult, Grégoire Lemoult, H Schlichting, HW Emmons, I Wygnanski, IJ Wygnanski, J Gibson, J Rinzel, J Tyson, K Avila, KR Sreenivasan, M Avila, M Avila, M Chantry, M Holzner, M Nishi, M Sipos, Marc Avila, N Tillmark, O Reynolds, RR Kerswell, SB Pope, T Mullin, Vasudevan Mukund, Y Duguet   +40 more
core   +1 more source

3D‐Printed Coil Immobilized Enzyme Reactors for Laccase Biocatalysis in Single‐ and Two‐Phase Flow

Chemie Ingenieur Technik, EarlyView.
Development of 3D‐printed immobilized enzyme reactors functionalized with laccase for continuous‐flow biocatalysis. Surface coupling and reactor design enhanced stability and mass transfer, enabling efficient and reusable biocatalytic processes.
Alina J. Tauriainen, Alexander S. Sommer‐Behr, Julian Handke, Stephan Lütz, Norbert Kockmann   +4 more
wiley   +1 more source

Characterization of a two‐phase hybrid flotation column

The Canadian Journal of Chemical Engineering, EarlyView.
Abstract This study explored the performance of a novel hybrid flotation column, which combines the advantages of a mechanically agitated cell with a flotation column and compared the results with a conventional flotation column setup. The experiments were performed in an air/water two‐phase system under varying airflow rates, frother concentrations ...
Pedro Silva Aires, Artin Afacan, Qi Liu, Vinay Prasad   +3 more
wiley   +1 more source

Investigation of velocity profile in rock–ice avalanche by particle image velocimetry measurement

Open Geosciences
Understanding the velocity profile of geophysical flows is essential for analyzing their dynamical characteristics. However, existing studies have predominantly concentrated on the velocity profile of debris flows and rock avalanches, neglecting the ...
Sun Zhiping, Li Shentian, Dong Zhibo
doaj   +1 more source

Numerical simulations on effects of turbulence on the size spectrum of sinking particles in ocean surface boundary layer

Frontiers in Earth Science
Sinking particles in the ocean play a crucial role in the climate system by transporting materials, such as carbon, deep into the ocean. The amount of this transport is influenced by the net sinking speed of the particles and the amount of material ...
Keisuke Nishino, Keisuke Nishino, Yutaka Yoshikawa   +2 more
doaj   +1 more source

Fourier Mass Lower Bounds for Batchelor‐Regime Passive Scalars

Communications on Pure and Applied Mathematics, EarlyView.
ABSTRACT Batchelor predicted that a passive scalar ψν$\psi ^\nu$ with diffusivity ν$\nu$, advected by a smooth fluid velocity, should typically have Fourier mass distributed as |ψ̂ν|2(k)≈|k|−d$|\widehat{\psi }^\nu |^2(k) \approx |k|^{-d}$ for |k|≪ν−1/2$|k| \ll \nu ^{-1/2}$.
William Cooperman, Keefer Rowan
wiley   +1 more source

On the problem of turbulence [PDF]

, 2000
A central theme in the history of the turbulence problem is about the method of ‘closure’ in the models and ‘theories’ which have been proposed. Closure has invariably been by empirical calibration with experimental data.
Roshko, Anatol
core  

Plasmakristall‐4 Experiment: 10 Years of Operation in Orbit

Contributions to Plasma Physics, EarlyView.
ABSTRACT Plasmakristall‐4 (PK‐4) is a microgravity complex plasma laboratory operated for 10 years on board the International Space Station. Its main purpose is the particle‐resolved investigation of generic condensed matter phenomena using strongly coupled suspensions of microparticles immersed in low‐pressure gas‐discharge plasmas.
M. Pustylnik, H. M. Thomas, M. Kretschmer, M. Thoma   +3 more
wiley   +1 more source

Evaluation of Eddy Viscosity Models in Predicting Free- Stream Turbulence Penetration

Journal of Applied Fluid Mechanics, 2013
Turbulence schemes have long been developed and examined for their accuracy and stability in a variety of environments. While many industrial flows are highly turbulent, models have rarely been tested to explore whether their accuracy withstands such ...
M. Kahrom, A Shokrgozar
doaj  

An integral turbulent kinetic energy analysis of free shear flows [PDF]

Mixing of coaxial streams is analyzed by application of integral techniques. An integrated turbulent kinetic energy (TKE) equation is solved simultaneously with the integral equations for the mean flow.
Peters, C. E., Phares, W. J.
core   +1 more source