Results 91 to 100 of about 22,502 (309)

Modulation of homogeneous turbulence seeded with finite size bubbles or particles [PDF]

, 2010
The dynamics of homogeneous, isotropic turbulence seeded with finite sized particles or bubbles is investigated in a series of numerical simulations, using the force-coupling method for the particle phase and low wavenumber forcing of the flow to sustain
Yeo, Kyongmin, Maxey, Martin R., Dong, Suchuan, Climent, Éric   +3 more
core   +1 more source

Terahertz Channel Modeling, Estimation and Localization in RIS‐Assisted Systems

Advanced Electronic Materials, EarlyView.
Reconfigurable intelligent surfaces have become a recent intensive research focus. Based on practical applications, channel strategies for RIS‐assisted terahertz wireless communication systems are categorized into three different types: channel modeling, channel estimation, and channel localization.
Hongjing Wang, Weipeng Wang, Xuan Cong, Shiyu Wang, Gao Li, Sen Gong, Lin Huang, Hongxin Zeng, Yaxin Zhang, Ziqiang Yang   +9 more
wiley   +1 more source

Automatic Transition Prediction and Application to High-Lift Multi-Element Configurations

, 2004
A Reynolds-averaged Navier-Stokes (RANS) solver, a laminar boundary layer code and an e(N)-database method for transition prediction were coupled in order to perform RANS computations of two-dimensional high-lift multi-element systems with automatic ...
Krumbein, Andreas, Andreas Krumbein, Krumbein, A.   +2 more
core   +1 more source

Onset of meso-scale turbulence in active nematics

Nature Communications, 2017
Bacteria continuously inject energy into their surroundings and thus induce chaotic like flows, namely meso-scale turbulence. Here, the authors show that transition to meso-scale turbulence and inertial turbulence observed in pipes share the same scaling
Amin Doostmohammadi, Tyler N. Shendruk, Kristian Thijssen, Julia M. Yeomans   +3 more
doaj   +1 more source

Numerical prediction of sheet cavitation on marine propellers using CFD simulation with transition-sensitive turbulence model

Alexandria Engineering Journal, 2018
One of the big challenges, yet to be addressed, in the numerical simulation of cavitating flow on marine propellers is; the existence of laminar and turbulence transition flows over the propeller’s blades.
Mohamed M. Helal, Tamer M. Ahmed, Adel A. Banawan, Mohamed A. Kotb   +3 more
doaj   +1 more source

The effect of varying degrees of stenosis on transition to turbulence in oscillatory flows. [PDF]

Biomech Model Mechanobiol, 2022
Jain K.
europepmc   +1 more source

Transition to turbulence in a shear flow

Physical Review E, 1999
We analyze the properties of a 19 dimensional Galerkin approximation to a parallel shear flow. The laminar flow with a sinusoidal shape is stable for all Reynolds numbers Re. For sufficiently large Re additional stationary flows occur; they are all unstable.
Eckhardt, Bruno, Mersmann, Alois
openaire   +3 more sources

A Compact Hollow Fiber Electrode Assembly Architecture for Continuous Electrochemical Marine Carbon Dioxide Removal

Advanced Energy Materials, EarlyView.
A coaxial, membrane‐integrated hollow fiber electrode assembly (HFEA) is developed for continuous marine carbon mineralization. By utilizing a sub‐millimeter inter‐electrode gap, the HFEA minimizes Ohmic losses, achieving 50% energy reduction and over 85% DIC removal.
Inhwan Park, Young Hun Lee, Jung Hun Lee, Seung‐Jeong Oh, T. Alan Hatton, Dong‐Yeun Koh   +5 more
wiley   +1 more source

Techniques for Turbulence Tripping of Boundary Layers in RANS Simulations

, 2022
The exact placement of the laminar–turbulent transition has a significant effect on relevant characteristics of the boundary layer and aerodynamics, such as drag, heat transfer and flow separation on e.g. wings and turbine blades.
Vinuesa, Ricardo,, Örlü, Ramis,, Tabatabaei, Narges,, Schlatter, Philipp,   +3 more
core   +1 more source

Direct and noisy transitions in a model shear flow

Theoretical and Applied Mechanics Letters, 2015
The transition to turbulence in flows where the laminar profile is linearly stable requires perturbations of finite amplitude. “Optimal” perturbations are distinguished as extrema of certain functionals, and different functionals give different optima ...
Marina Pausch, Bruno Eckhardt
doaj   +1 more source