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Velocity gradient

About: Velocity gradient is a research topic. Over the lifetime, 3013 publications have been published within this topic receiving 77120 citations.


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TL;DR: In this paper, a flat plate with solid particles of the Stokes number 0.15 and 1.4 is simulated through the vortex method, which makes the gas mean velocity gradient in the wake crosssection gentler and the gas turbulent intensity reduces by the particle except near the wake centerline.

20 citations

Journal ArticleDOI
TL;DR: The Gortler series method for the solution of the two-dimensional boundary-layer flow equations is extended to include Ostwald-deWaele (power-law) fluids as mentioned in this paper.

20 citations

Journal ArticleDOI
TL;DR: In this paper, a three-dimensional simulation was conducted to investigate water flow over the accumulator unit of an underwater compressed air energy storage system, which was installed close to the bed of deep water.

20 citations

Journal ArticleDOI
TL;DR: In this article, it is shown that Tirrell's diffusion flux can be deduced from a macroscopic modelling which involves second-order gradients and a vectorial internal variable related to the microstructure.
Abstract: The present study concerns the phenomenon of flow-induced polymer migration. It is shown that Tirrell's diffusion flux can be deduced from a macroscopic modelling which involves second-order gradients and a vectorial internal variable related to the microstructure. In contrast to Tirrell's model, however, a migration may also occur across straight streamlines. The flow down an inclined plane is examined by way of example. The roles played by the microstructure and the second gradients, respectively, are thus exhibited.

20 citations

Journal ArticleDOI
TL;DR: Investigation of fluctuations in the momentum flux across a surface perpendicular to the velocity gradient in a stationary shear flow maintained by either thermostated deterministic or by stochastic boundary conditions finds the latter appear to satisfy a modified fluctuation relation.
Abstract: We investigate fluctuations in the momentum flux across a surface perpendicular to the velocity gradient in a stationary shear flow maintained by either thermostated deterministic or by stochastic boundary conditions. In the deterministic system the fluctuation relation for the probability of large deviations, which holds for the phase space volume contraction giving the Gibbs ensemble entropy production, never seems to hold for the flux which gives the hydrodynamic entropy production. In the stochastic case the fluctuation relation is found to hold for the total flux, as predicted by various exact results, but not for the flux across part of the surface. The latter appear to satisfy a modified fluctuation relation. Similar results are obtained for the heat flux in a steady state produced by stochastic boundaries at different temperatures.

20 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202318
202233
2021127
2020116
2019134
201892