Results 51 to 60 of about 1,271,365 (344)
Asymptotic predictions on the velocity gradient statistics in low-Reynolds number random flows: Onset of skewness, intermittency and alignments [PDF]
arXiv, 2023 Stirring a fluid through a Gaussian forcing at a vanishingly small Reynolds number produces a Gaussian random field, while flows at higher Reynolds numbers exhibit non-Gaussianity, cascades, anomalous scaling and preferential alignments. Recent works (Yakhot and Donzis, Phys. Rev. Lett., vol. 119, 2017, pp. 044501; Gotoh and Yang, Philos. Trans.
arxiv
Nonlinear aspects of high Reynolds number channel flows [PDF]
, 2010 This paper considers the flow in a two-dimensional channel at high Reynolds number, with wall deformations which can lead to flow separation. An asymptotic model is proposed by using the successive complementary expansion method with generalized ...
Cathalifaud, Patricia +2 more
core +2 more sources
Decay of Turbulence at High Reynolds Numbers [PDF]
Physical Review Letters, 2015 Turbulent motions in a fluid decay at a certain rate once stirring has stopped. The role of the most basic parameter in fluid mechanics, the Reynolds number, in setting the decay rate is not generally known. This Letter concerns the high-Reynolds-number limit of the process. In a classical grid-turbulence wind-tunnel experiment that both reaches higher
Michael Sinhuber +2 more
openaire +4 more sources
Valveless Pumping at Low Reynolds Numbers
Physical Review Applied, 2023 Pumping at low Reynolds number is a ubiquitously encountered feature, both in biological organisms and engineered devices. Generating net flow requires the presence of an asymmetry in the system, which traditionally comes from geometric flow rectifiers.
Gabriel Amselem +2 more
openaire +2 more sources
Steady flow over triangular extended solid attached to square cylinder – A method to reduce drag
Ain Shams Engineering Journal, 2015 Numerical analysis of two dimensional steady flows over a triangular extended solid (thorn) attached to square cylinder positioned at front stagnation point and at rear stagnation point separately is reported at low Reynolds number (Re = 40).
Prasenjit Dey, Ajoy Kr. Das
doaj +1 more source
Unsteady behavior of a confined jet in a cavity at moderate Reynolds numbers [PDF]
, 2012 Self-sustained oscillations in the sinuous mode are observed when a jet impinges on a rigid surface. Confined jet instability is experimentally and numerically investigated here at moderate Reynolds numbers.
Bouchet, Gilles, Climent, Éric
core +2 more sources
Olfactory search at high Reynolds number [PDF]
Proceedings of the National Academy of Sciences, 2002 Locating the source of odor in a turbulent environment—a common behavior for living organisms—is nontrivial because of the random nature of mixing. Here we analyze the statistical physics aspects of the problem and propose an efficient strategy for olfactory search that can work in turbulent plumes.
Boris I. Shraiman, Eugene Balkovsky
openaire +4 more sources
Neural Network Models for the Anisotropic Reynolds Stress Tensor in Turbulent Channel Flow [PDF]
, 2019 Reynolds-averaged Navier-Stokes (RANS) equations are presently one of the most popular models for simulating turbulence. Performing RANS simulation requires additional modeling for the anisotropic Reynolds stress tensor, but traditional Reynolds stress closure models lead to only partially reliable predictions.
arxiv +1 more source
EnergiesThe early stages of hydrogen–air and methane–air flame dynamics and the development and evolution of tulip flames in closed tubes of various aspect ratios and in a semi-open tube are studied by solving the fully compressible reactive Navier–Stokes ...
Chengeng Qian, Mikhail A. Liberman
doaj +1 more source
Reynolds number effect on the velocity increment skewness in isotropic turbulence [PDF]
, 2011 Second and third order longitudinal structure functions and wavenumber spectra of isotropic turbulence are computed using the EDQNM model and compared to results of the multifractal formalism.
Bos, Wouter J. T. +3 more
core +3 more sources