Results 81 to 90 of about 4,829,865 (391)
Turbulence: from Complexity to Variety [PDF]
arXiv, 2021 In this note we advocate the notion of variety as juxtaposed to the notion of complexity. Laminar flows are complex, turbulence is various. When the gradients reach a critical point, laminar flows are subjected to instabilities and transitions, sometime soft, sometime dramatic, and the final result is the variety.
arxiv
Complexity of the laminar-turbulent boundary in pipe flow [PDF]
Phys. Rev. Fluids 3, 054401 (2018), 2018 Over the past decade, the edge of chaos has proven to be a fruitful starting point for investigations of shear flows when the laminar base flow is linearly stable. Numerous computational studies of shear flows demonstrated the existence of states that separate laminar and turbulent regions of the state space.
arxiv +1 more source
Accumulating particles at the boundaries of a laminar flow [PDF]
Physica A: Statistical Mechanics and its Applications, 2007 The accumulation of small particles is analyzed in stationary flows through channels of variable width at small Reynolds number. The combined influence of pressure, viscous drag and thermal fluctuations is described by means of a Fokker-Planck equation for the particle density. It is shown that in the limit of vanishing particle size a uniform particle
Michael Schindler +4 more
openaire +4 more sources
Deformation Behavior of La2O3‐Doped Copper during Equal Channel Angular Pressing
Advanced Engineering Materials, EarlyView.By additions of strengthening elements and/or structure optimization, the mechanical properties of copper can be increased while keeping favorable electric conductivity. By combining addition of La2O3 and processing by equal channel angular pressing, substructure development is achieved, leading to increase in microhardness to more than double the ...
Lenka Kunčická +2 more
wiley +1 more source
Analytical Solution For Navier-Stokes Equations In Two Dimensions For Laminar Incompressible Flow [PDF]
arXiv, 2006 The Navier-Stokes equations describing laminar flow of an incompressible fluid will be solved. Different group of general solutions for Navier stokes equations governing Laminar incompressible fluids will be derived.
arxiv
Laminar flow enhancement Patent [PDF]
, 1970 Laminar flow of liquid coolants in rocket ...
Ayvazian, R. A.
core +1 more source
AN EXTENSION OF THE FLOW BOILING CORRELATION TO TRANSITION, LAMINAR AND DEEP LAMINAR FLOWS IN MINICHANNELS AND MICROCHANNELS [PDF]
Proceeding of Compact Heat Exchangers and Enhancement Technology for the Process Industries - 2003, 2004 Flow boiling in mini- and microchannels offer very high heat transfer capabilities and find applications in many emerging technologies, such as electronics cooling and fuel cells. The low flow rate employed in such geometries, coupled with the small flow channels, often results in a laminar flow with all flow as liquid. Since the single-phase flow with
Satish G. Kandlikar +1 more
openaire +2 more sources
Designing a more nonlinearly stable laminar flow via boundary manipulation
Journal of Fluid Mechanics, 2013 We show how a fully nonlinear variational method can be used to design a more nonlinearly stable laminar shear flow by quantifying the effect of manipulating the boundary conditions of the flow.
Sme Rabin +2 more
semanticscholar +1 more source
Advanced Engineering Materials, EarlyView.This study explores aerosol jet‐printed (AJP) surface roughness, its effects on the performance of microwave electronics, and its process contributors. First, an electromagnetic model is vetted for AJP's unique roughness signature. Simulations are built which show process‐induced roughness is as significant as conductor resistivity in driving microwave
Christopher Areias, Alkim Akyurtlu
wiley +1 more source
Beyond the maximum drag reduction asymptote: the pseudo-laminar state [PDF]
arXiv, 2019 Recent experiments indicated that polymers can reduce the turbulent drag beyond the asymptotic limit known as the MDR, leading to a laminar flow. In this Letter, we show through direct numerical simulations that, when the MDR is exceeded, the flow can remain in a laminar-like regime for a very long period without being truly laminar. During this period
arxiv