[PDF] Top 20 Speed and structure of turbulent fronts in pipe flow

Speed and structure of turbulent fronts in pipe flow

... mean turbulent advection speed c is larger than the speeds of both upstream front (cyan up-triangles) and downstream front (red ...bulk turbulent structures are stationary, both fronts move to ... See full document

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Taming turbulent fronts by bending pipes

... The flow of fluid through a pipe has been instrumental in illuminating the subcritical route to turbulence typical of many wall-bounded shear ...the turbulent-laminar fronts that separate the ... See full document

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Simulation of Average Turbulent Pipe Flow: A Three Equation Model

... large turbulent structures in the flow field are resolved, while the effect of sub-grid scales (SGS) are ...a turbulent pipe flow at Reynolds number of ... See full document

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Structure of turbulent flow over regular arrays of cubical roughness

... were larger than those over the rough wall by a factor of two or more. These authors pointed out that this is consistent with the structures being inclined at a steeper angle near the wall over the rough wall compared to ... See full document

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Turbulent slurry flow measurement using ultrasonic Doppler method in rectangular pipe

... electromagnetic flow meter Krohne Optiflux 5000 installed at the vertical pipe in front of Section ...maintains flow of slurry through the loop. The speed of the pump is smoothly regulated by ... See full document

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Distinct Organizational States of Fully Developed Turbulent Pipe Flow

... There are two very distinct approaches to turbulence research. One is based on a dynamical systems viewpoint and the approach to the problem is to try to capture its essence in a mechanistic, low-dimensional system. ... See full document

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Conjugate heat transfer for turbulent flow in a thick walled plain pipe

... the flow domain remained same. The proper mesh number for the flow domain was found to be 80,000 elements and reported in “Comparison of turbulence models and solution options for a thick walled plain ... See full document

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Destabilizing turbulence in pipe flow

... The flow rate and hence the Reynolds number (Re = U D/ν where U is the mean velocity, D the diameter of the tube and ν the kinematic viscosity of the fluid) can be adjusted by means of a valve in the supply ...the ... See full document

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Large eddy simulation of accelerated turbulent flow in a circular pipe

... transient turbulent pipe flow were performed using LES to investigate the response of unsteady turbulence to temporal ...transient flow after the onset of the acceleration was divided into ... See full document

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Two Point Statistics of Coherent Structure in Turbulent Flow

... (propagation speed) is shown to be determined by distant vortices ( y s + > 10 ) ...limiting structure of VVCS, defined as the structure at y r = 0 ...vortical structure close to the wall ... See full document

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Models of Turbulent Pipe Flow

... laminar flow which are necessary to sustain them (as noticed by Lindgren (1957), see also Hof et ...minimal flow unit able to sustain ...dominant flow structures inside a puff are quasi-streamwise ... See full document

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Relative periodic orbits form the backbone of turbulent pipe flow

... of turbulent flow simulations (Auerbach et ...originated. Pipe flow is driven by a pressure gradient; hence, all of its finite-amplitude solutions drift ...the pipe flow, in ... See full document

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Development of a Functional Speed Skating Uniform through Aerodynamic Analysis on Knit Textiles and Uniforms

... improve speed skating uniforms through the development of materials to minimize air resistance and proper placement of the developed ...a turbulent boundary layer, compared to the material using smooth ... See full document

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Discrete Tracer Point Method to Evaluate Turbulent Diffusion in Circular Pipe Flow

... simulate the displacement of points released into straightsmooth circular airway flow by giving turbulent average velocity, intensity of velocity fluctuation and Reynolds stress; 2 A sim[r] ... See full document

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Measurement of particle concentration in horizontal, multiphase pipe flow using acoustic methods: Limiting concentration and the effect of attenuation

... horizontal turbulent pipe flow at Reynolds numbers of 25 000 and 50 000 – below and above the critical deposition velocity, respectively - and nominal concentrations of ...and flow rate on the ... See full document

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MEASUREMENT OF MEAN VELOCITY PROFILE IN A TURBULENT PIPE FLOW – A NUMERICAL APPROACH

... dimensional pipe model with a dimension of 102mm x 8976mm, with the dimension of the pipe sufficiently long enough to make the flow fully ...The flow domain in this study is discretized into ... See full document

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CFD Analysis of Two Pass Double Pipe Heat Exchanger with TiO2/Ethylene Glycol Nano Fluid

... under turbulent flow condition with different flow rates of 8, 10, 12, 14, 16 lpm and at various Nano fluid volume-fractions of ...fluid flow rate of 8 ...Double pipe heat exchanger at ... See full document

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Computational Analysis of Turbulent flow heat transfer and pressure loss in Duct or Pipe with Segmental Baffles

... In the present work local heat transfer and pressure drop along the length are examined and comparative analysis has been done between smooth and segmental Baffle pipe. It has observed that on implementing the ... See full document

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Identification of possible non-stationary effects in a new type of vortex furnace

... swirling flow with different regime parameters was conducted in an isothermal laboratory model (in 1:25 scale) of vortex furnace using laser Doppler measuring system and pressure pulsations ...the flow ... See full document

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The Experimental Study of Nanoparticles Effect on Thermal Efficiency of Double Pipe Heat Exchangers in Turbulent Flow

... flowing through a vertical pipe in an upward direction under a constant heat flux boundary condition in both a laminar and a turbulent flow regime. Their results showed that at a given Reynolds ... See full document

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