Results 41 to 50 of about 13,563,281 (204)

Experimental study on the permeability of crushed coal medium based on the Ergun equation

Scientific Reports, 2021
Accurate determination of the permeability of crushed coal medium is the basis for the study of their permeability characteristics. To investigate the permeability characteristics of this special porous medium composed of crushed coal particles, the ...
Mingkun Pang, Tianjun Zhang, Yukai Meng, Zhiqiang Ling   +3 more
doaj   +1 more source

Dynamics of a high-Reynolds-number bubble rising within a thin gap [PDF]

, 2012
We report an experimental analysis of path and shape oscillations of an air bubble of diameter d rising in water at high Reynolds number in a vertical Hele-Shaw cell of width h.
Billet, Anne-Marie, Roig, Véronique, Risso, Frédéric, Roudet, Matthieu   +3 more
core   +1 more source

A New Approach for Accurate Prediction of Liquid Loading of Directional Gas Wells in Transition Flow or Turbulent Flow

Journal of Chemistry, 2017
Current common models for calculating continuous liquid-carrying critical gas velocity are established based on vertical wells and laminar flow without considering the influence of deviation angle and Reynolds number on liquid-carrying. With the increase
Ruiqing Ming, Huiqun He
doaj   +1 more source

Estimating Reynolds number scaling thresholds in urban street canyon flows using a CFD-derived generalized linear model

Developments in the Built Environment
This study examines Reynolds-number scaling thresholds for reduced-scale modelling of airflow in idealized urban street-canyon arrays. Six variables are considered, namely Reynolds number (Re), dimensionless building height (H′), coefficient of variation
Sirui Zhu, Haoyang Li, Guoliang Chen, Puyang Liu, Jinjun Ye, Chun-Ho Liu, Lup Wai Chew   +6 more
doaj   +1 more source

Numerical Computations of Vortex Formation Length in Flow Past an Elliptical Cylinder

Fluids, 2020
We examine two dimensional properties of vortex shedding past elliptical cylinders through numerical simulations. Specifically, we investigate the vortex formation length in the Reynolds number regime 10 to 100 for elliptical bodies of aspect ratio in ...
Matthew Karlson, Bogdan G. Nita, Ashwin Vaidya   +2 more
doaj   +1 more source

Investigation of Drag Coefficient at Subcritical and Critical Reynolds Number Region for Circular Cylinder with Helical Grooves

International Journal of Maritime Technology, 2017
Drag reduction of an object is the major concern in many engineering applications. Experimental studies have been carried out on circular cylinder with helical grooves in a subsonic wind tunnel.
Dewan Hasan Ahmed, Md. Ashraful Haque, Md, Abdur Rauf   +2 more
doaj  

Analytical Estimates of Critical Taylor Number for Motion between Rotating Coaxial Cylinders Based on Theory of Stochastic Equations and Equivalence of Measures

Fluids, 2021
The purpose of this article was to present the solution for the critical Taylor number in the case of the motion between rotating coaxial cylinders based on the theory of stochastic equations of continuum laws and the equivalence of measures between ...
Artur V. Dmitrenko
doaj   +1 more source

Influence of Inflow Turbulence on the Flow Characteristics around a Circular Cylinder

Applied Sciences, 2019
To study the influence of turbulence on the wind pressure and aerodynamic behavior of smooth circular cylinders, wind tunnel tests of a circular cylinder based on wind pressure testing were conducted for different wind speeds and turbulent flows.
Jianfeng Yao, Wenjuan Lou, Guohui Shen, Yong Guo, Yuelong Xing   +4 more
doaj   +1 more source

Numerical method investigation on the aggregation characteristics of non-spherical particles.

PLoS ONE, 2023
Under the background of the mechanical mechanism research of microfluidic technology for separating and screening pipeline particulate matter, this paper proposes an improved relative motion model by combining the multiple reference frame method and the ...
Pan Gao, Qikun Wang, Tangjing Liu
doaj   +1 more source

Small-scale turbulent dynamo for low-Prandtl number fluid: Comparison of the theory with results of numerical simulations

Astronomy & Astrophysics
Context. During the past decades, significant progress has been made in numerical simulations of the turbulent dynamo and the theoretical understanding of turbulence.
Kopyev A. V., Il’yn A. S., Sirota V. A., Zybin K. P.   +3 more
doaj   +1 more source