Results 51 to 60 of about 1,146 (113)

Direct Numerical Simulation of Boundary Layer Transition Induced by Roughness Elements in Supersonic Flow

Aerospace
Current research on the transition mechanisms induced by moderate-height roughness elements remains insufficiently explored. Hence, direct numerical simulation (DNS) and BiGlobal stability analysis are employed in this study to investigate boundary layer
Haiyang Wang, Zaijie Liu, Hexia Huang, Huijun Tan, Dan Zhao   +4 more
doaj   +1 more source

Quantum-inspired information entropy in multifield turbulence

Physical Review Research
An information entropy for turbulence systems with multiple field quantities is formulated, as a new paradigm to explore the nonlinear dynamics and pattern formations.
Go Yatomi, Motoki Nakata
doaj   +1 more source

Transition mechanisms in hypersonic wind-tunnel nozzles: a methodological approach using global linear stability analysis

Flow
Base-flow computations and stability analyses are performed for a hypersonic wind tunnel nozzle at a Mach number of 6. Isothermal and adiabatic wall boundary conditions are investigated, and moderate stagnation conditions are used to provide ...
Hugo Lemarquand, Mathieu Lugrin, Cédric Content, Clément Caillaud, Sébastien Esquieu, Denis Sipp   +5 more
doaj   +1 more source

The transition to turbulence in parallel flows: transition to turbulence or to regular structures

, 2015
We propose a scenario for the formation of localized turbulent spots in transition flows, which is known as resulting from the subcritical character of the transition. We show that it is not necessary to add 'by hand" a term of random noise in the equations, in order to describe the existence of long wavelength fluctuations as soon as the bifurcated ...
Pomeau, Yves, Berre, Martine Le
openaire   +2 more sources

Intermittency in the Transition to Turbulence for a Shear-Thinning Fluid in Hagen-Poiseuille Flow

Journal of Applied Fluid Mechanics, 2014
Since Reynolds original experiments in 1883, very few studies have been carried out on the transition to turbulence for shear thinning fluid in Hagen-Poiseuille.
Seyed Amir BAHRANI, Chérif NOUAR
doaj  

The Use of Transition Region Characteristics to Improve the Numerical Simulation of Heat Transfer in Bypass Transitional Flows

International Journal of Rotating Machinery, 1995
A method is presented for improving the numerical prediction of bypass transition heat transfer on a flat plate in a high-disturbance environment with zero or favorable pressure gradient.
Frederick F. Simon
doaj   +1 more source

Numerical simulation of slot jet impingement heat transfer based on one-equation intermittency transition model

Zhongguo Jianchuan Yanjiu
[Objectives]Since the jet impingement phenomena involves the problems of laminar-turbulence transition process, strong adverse pressure gradient and separated fluid, it is difficult to predict the phenomenon by using the traditional turbulence models ...
Huang Huakun, Zhang Guiyong, Sun Tiezhi, Zong Zhi   +3 more
doaj   +1 more source

Observations of Transition from Imbalanced to Balanced Kinetic Alfvénic Turbulence

The Astrophysical Journal Letters
We report observations of solar wind turbulence derived from measurements by the Parker Solar Probe. Our findings reveal the emergence of finite magnetic helicity within the transition range of the turbulence, aligning with signatures of kinetic Alfvén ...
Jinsong Zhao, Trevor A. Bowen, Stuart D. Bale, Chen Shi, Thierry Dudok de Wit, Nikos Sioulas   +5 more
doaj   +1 more source

Transition to turbulence

Scholarpedia, 2009
Paul Manneville, Yves Pomeau
openaire   +1 more source

Spatiotemporal Properties of Compressible Magnetohydrodynamic Turbulence from Space Plasma

The Astrophysical Journal
It is well established that Alfvénic turbulence undergoes a weak-to-strong transition as energy cascades to smaller scales, but whether this occurs in compressible magnetohydrodynamic (MHD) turbulence remains unclear.
Siqi Zhao, Huirong Yan, Terry Z. Liu, Chuanpeng Hou, Ka Ho Yuen   +4 more
doaj   +1 more source