Results 31 to 40 of about 191,627 (301)
The reptating rope model: Viscometric functions for concentrated polymer solutions and melts in shear flow [PDF]
, 1989 The viscometric functions for shear flow as predicted by the inextensible reptating rope model have been analysed numerically and analytically. The results obtained are compared with the predictions of the Curtiss—Bird theory.
Geurts, Bernard J.
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Faxén's law for arbitrary oscillatory Stokes flow past a porous sphere
Archives of Mechanics, 2012 The present article deals with the study of the hydrodynamics of a porous sphere in an oscillatory viscous flow of an incompressible Newtonian fluid. Unsteady Stokes equations are used for the flow outside the porous sphere and Darcy's equation is used ...
J. Prakash, G.P. Raja Sekhar, M. Kohr
doaj +1 more source
Numerical simulation of vortex-induced vibration of a 2D cylinder in oscillatory flow
Zhongguo Jianchuan Yanjiu, 2019 [Objectives] In the actual oil and gas exploitation,the combined actions of wind, waves and currents may cause the offshore platform to oscillate periodically,and then the relative oscillatory flow is generated between risers connected to the platform ...
DENG Di, WANG Zhe, WAN Decheng
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Exploiting timescale separation in micro and nano flows [PDF]
, 2011 In this paper we describe how timescale separation in micro/nano flows can be exploited for computational acceleration. A modified version of the seamless heterogenous multiscale method (SHMM) is proposed: a multi-step SHMM.
Borg, Matthew Karl +3 more
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Oscillatory rheotaxis of artificial swimmers in microchannels
Nature Communications, 2022 Biological and artificial microswimmers often navigate channels under external flow, where in many biomicroswimmers the active upstream motion is oscillatory. Here the authors demonstrate that regular, controllable, and reproducible oscillatory rheotaxis
Ranabir Dey +4 more
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On Phase Asymmetries in Oscillatory Pipe Flow [PDF]
, 2016 We present results from direct numerical simulations (DNS) of oscillatory pipe flow at several dimensionless frequencies Wo = {6.5, 13, 26} and one fixed shear Reynolds number Re_τ = 1440. Starting from a fully-developed turbulent velocity field at that Re_τ, the oscillatory flow either relaminarises or reaches a conditionally turbulent or strongly ...
Feldmann, Daniel, Wagner, Claus
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Oscillatory Carreau flows in straight channels [PDF]
Royal Society Open Science, 2020 The present paper studies the oscillatory flow of Carreau fluid in a channel at different Womersley and Carreau numbers. At high and low Womersley numbers, asymptotic expansions in small parameters, connected with the Womersley number, are developed. For the intermediate Womersley numbers, theoretical bounds for the velocity solution and its gradient ...
S. Tabakova, N. Kutev, St. Radev
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Pressure Change in Tee Branch Pipe in Oscillatory Flow
Advances in Mechanical Engineering, 2013 The purpose of this paper is to contribute to the understanding of unsteady flow of branch pipes in pneumatic systems. Branch pipes are used in pneumatic pipe systems in various industrial fields. To predict the unsteady pressure changes in the pneumatic
Daisuke Sakamoto +2 more
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International Journal of Applied Mechanics and Engineering, 2020 The governing equations of an electrohydrodynamic oscillatory flow were simplified, using appropriate nondimensional quantities and the conversion relationships between fixed and moving frame coordinates.
M.H. Haroun
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Hydrodynamic Irreversibility in Particle Suspensions with Non-Uniform Strain [PDF]
, 2010 A dynamical phase transition from reversible to irreversible behavior occurs when particle suspensions are subjected to uniform oscillatory shear, even in the Stokes flow limit.
Gollub, J. P. +2 more
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