Journal ArticleDOI
A computational study of wall friction and turbulence dynamics in accelerating pipe flows
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In this article, a low-Reynolds-number k-e turbulence model is used in conjunction with a finite volume/finite difference discretization scheme to study the influence of turbulence and inertia on wall shear stresses.About:
This article is published in Computers & Fluids.The article was published on 2008-07-01. It has received 59 citations till now. The article focuses on the topics: K-epsilon turbulence model & K-omega turbulence model.read more
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References and benchmarks for pore-scale flow simulated using micro-CT images of porous media and digital rocks
Nishank Saxena,Ronny Hofmann,Faruk O. Alpak,Steffen Berg,Jesse Dietderich,Umang Agarwal,Kunj Tandon,Sander Hunter,Justin Freeman,Ove Bjørn Wilson +9 more
TL;DR: A novel reference dataset is generated to quantify the impact of numerical solvers, boundary conditions, and simulation platforms on permeability of microstructures ranging from idealized pipes to digital rocks and finds that more stringent convergence criteria can improve solver accuracy but at the expense of longer computation time.
Journal ArticleDOI
Experimental study of bore-driven swash hydrodynamics on impermeable rough slopes
TL;DR: In this paper, a detailed experimental investigation of the hydrodynamics of large-scale, bore-driven swash on impermeable, rough beach slopes is described, where simultaneous depths and velocities were measured using LIF, Laser-induced fluorescence, and PIV, particle image velocimetry, respectively.
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Towards Bayesian Quantification of Permeability in Micro-scale Porous Structures – The Database of Micro Networks
TL;DR: A Bayesian framework to quantify the absolute permeability of water in a porous structure from the geometry and clustering parameters of its underlying pore-throat network, using a Database of Micro Networks for micro-scale porous structures as main input stream for the proposed Bayesian scheme.
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Imaging and computational considerations for image computed permeability: Operating envelope of Digital Rock Physics
Nishank Saxena,Amie Hows,Ronny Hofmann,Faruk O. Alpak,Justin Freeman,Sander Hunter,Matthias Appel +6 more
TL;DR: In this article, the authors define the optimal operating envelope of the digital rock technology from the perspective of imaging and numerical simulations of transport properties, and find that at least 10 voxels are needed to sufficiently resolve pore throats for single phase fluid flow simulations.
Journal ArticleDOI
Wall shear stress in accelerating turbulent pipe flow
TL;DR: In this article, an experimental study of wall shear stress in an accelerating flow of water in a pipe ramping between two steady turbulent flows has been undertaken in a large-scale experimental facility.
References
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Application of the energy-dissipation model of turbulence to the calculation of flow near a spinning disc
Brian Launder,B. I. Sharma +1 more
Journal ArticleDOI
Developments in unsteady pipe flow friction modelling
TL;DR: In this paper, two distinct unsteady friction models, the Zielke and the Brunone models, are investigated in detail, and the two models are incorporated into the method of characteristics water hammer algorithm.
Journal ArticleDOI
Transient turbulent friction in smooth pipe flows
Alan Vardy,Jim Brown +1 more
TL;DR: In this article, a weighting function model of unsteady skin friction in smooth-walled, one-dimensional ducts is derived using an idealized form of the radial viscosity distribution.
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