Reynolds number

Part 1 of ebook "Fluid flow measurement: A practical guide to accurate flow measurement (Third edition)" provides readers with contents including: Chapter 1 - Introduction; Chapter 2 - Basic flow measurement laws; Chapter 3 - Types of fluid flow measurement; Chapter 4 - Basic reference standards; Chapter 5 - From theory to practice; Chapter 6 - Fluids; Chapter 7 - Flow; Chapter 8 - Operations; Chapter 9 - Maintenance of meter equipment;...

143p tuongmothua 11-07-2024 0 0   Download

This paper describes an investigation of fluid flow through two tandem circular cylinders using Lattice-Boltzmann Method in direct numerical simulation. The diameter ratio of two circular cylinders, D1/D2 varies from 0.5 to 1.5, and spacing ratio (L/D2) varies from 1.5 to 10, whereas the Reynolds number of 100 is considered. The numerical model is well validated by comparing the results with those obtained in the literature.

8p dathienlang1012 03-05-2024 2 0   Download

In this research the effect of ground proximity on the lift, drag and moment coefficients of inverted, two-dimensional aerofoils was investigated. The purpose of the study was to examine the effect ground proximity on aerofoils post stall, in an effort to evaluate the use of active aerodynamics to increase the performance of a race car. The aerofoils were tested at angles of attack ranging from 0° – 135°. The tests were performed at a Reynolds number of 2.16 x 105 based on chord length. Forces were calculated via the use of pressure taps along the centreline of the aerofoils.

144p runthenight07 01-03-2023 7 3   Download

The flow of a thixotropic Bingham material past a rotating cylinder is studied under a wide range of Reynolds and Bingham numbers, thixotropic parameters, and rotational speeds. A microstructure transition of the material involving breakdown and recovery processes is modeled using a kinetic equation, and the BinghamPapanastasiou model is employed to represent shear stress-strain rate relations.

9p vimalfoy 08-02-2023 7 3   Download

Lecture Well Drilling Engineering: Lifting Capacity of Drilling Fluids and Particle Slip Velocity - Dr. Do Quang Khanh. After completing this section, you will understand knowledge about: fluid velocity in annulus, particle slip velocity, particle reynolds number, friction coefficient, iterative solution method, alternative solution method,...

35p bachkhinhdaluu 03-12-2021 14 1   Download

In this study, an optical-flow algorithm was applied to analyzing unsteady behavior of nearwake flow. The experiment was conducted at low-speed conditions and at Reynolds number around ReD = 1.97×104 to obtain image database for optical-flow processing. Measurement frequency was at 2000 fps.

12p cothumenhmong11 05-05-2021 27 2   Download

The test used Reynolds number 6.577 x 103 on a 1: 100 scale model. Testing was conducted at varying the angle of attack of 0° - 60°. The flow visualization was measured using dye injection method. The result of the research using GAMA water tunnel showed the aerodynamic force and vortex dynamics phenomenon that showed the difference in lift and drag coefficients. The results of this visualization showed the formation of vortex nuclei that occur in the wings of the aircraft model.

9p cleopatrahuynh 01-06-2020 8 0   Download

The flow was modeled with the turbulence model k-ω turbulence model. The results showed that Taylor-Couette flow would form a flow pattern of Couette laminar, wavy vortex, and vortex turbulent. The wavelength of the wavelength rises with increasing rotation. The profile of temperature distribution is in the form of a linear profile increases with the Reynolds number.

11p cleopatrahuynh 01-06-2020 13 0   Download

The immersed boundary method (IBM) is used for the simulations of the two-dimensional cases. The calculations are carried out on a Eulerian-Lagrangian grid using the finite difference method. The simulations are performed using two Reynolds numbers 100 and 200. The streamline and vorticity contours of the flow around the cylinders and force time histories are presented.

6p visasuke2711 25-04-2019 14 0   Download

Both cases show good agreement with the experiment or DNS result comparing to the pure LES mesh without wall modeling. The wall modeling LES approach could be used as a novel boundary layer simulation approach to avoid high computational cost.

4p praishy2 27-02-2019 18 1   Download

This paper presents numerical simulations of the convection and diffusion of heat or a contaminant released from a source in a ventilated two-dimensional room with one inlet and one or two outlets. Besides the influential factors on the air flow characteristic such as the Reynolds number (Re) and Grashof number (Gr) as well as the geometrical arrangement of the inlet.

12p thienthanquydu 23-10-2018 18 1   Download

In this paper, the problem of linear stability of viscous liquid films down an inclined plane is solved by finite difference method. It is applicable for moderate values of Reynolds and wave numbers. The obtained results by this method is compared with ones of some papers and with experimental data.

6p thienthanquydu 21-10-2018 27 0   Download

A variational principle for channel and pipe flows of incompressible viscous fluid is proposed. For low Reynolds numbers this variational principle reduces to the principle of minimum dissipation. For high Reynolds numbers it enables one to calculate the velocity profiles and the corresponding friction factors with reasonably good accuracy.

12p thienthanquydu 21-10-2018 19 0   Download

In this article, we present a numerical Smoothed Particle Hydrodynamic (SPH) method. In the SPH method for the Navier – Stokes equations the most widespread method to solve for pressure and mass conservation is the weakly compressible assumption (WCSPH). This article presents two important benchmark problems to validate the algorithm of SPH method. The two benchmark problems chosen are the Lid – driven cavity problem and Poiseuille flow problem at very low Reynolds numbers. The SPH results are also in good agreement with the analytical solution.

10p thienthanquydu 17-10-2018 35 0   Download

introduction to continuum mechanics has contents: introduction, the notion of stress; budgets, fluxes, and the equations of motion; kinematics in continuum mechanics; elastic bodies; waves in an elastic medium, statics of elastic media, newtonian fluids, creeping flow, high reynolds number flow.

142p bautroibinhyen19 02-03-2017 41 2   Download

Nội dung Bài giảng Thí nghiệm quá trình và thiết bị công nghệ hóa học nhằm xác định chuẩn số Reynolds (Reynolds Number); chưng cất (Distillation); xác định mực chất lỏng (Tank Draining); khuếch tán (Stefan Diffusion); thí nghiệm thiết bị truyền nhiệt (Heat Exchanger); tổng quan về các phân xưởng, quá trình và thiết bị trong nhà máy lọc dầu (Overview of Refinery);...

105p 187198402 08-07-2014 499 84   Download

In considering the overall workstation design, we must start with an analysis of the tasks which need to be performed there. No amount of ergonomic furniture can solve a situation where there is simply insufficient space. For example, as computer technology has been introduced into some offices, the computers or their terminals often have simply been placed onto existing desks, thus using up a large proportion of the space which is still needed for clerical tasks.

130p dacotaikhoan 25-04-2013 37 5   Download

In the thousands of English language articles, essays, and books by researchers and practitioners writing about grief following a death, there is little about African American grief (Barrett, 1995). This is not to say that a small number of studies cannot be immensely important. We have benefited from reading the works that are in the literature and that we cite at a number of places in this book, for example, Barrett (1995), Brice (1999), Hines (1986, 1991), Kalish and Reynolds (1981), and Meagher and Bell (1993).

222p cronus75 13-01-2013 66 4   Download

The purpose of this book is to introduce researchers and graduate students to a broad range of applications of computational simulations, with a particular emphasis on those involving computational fluid dynamics (CFD) simulations. The book is divided into three parts: Part I covers some basic research topics and development in numerical algorithms for CFD simulations, including Reynolds stress transport modeling, central difference schemes for convection-diffusion equations, and flow simulations involving simple geometries such as a flat plate or a vertical channel....

0p cucdai_1 15-10-2012 64 9   Download

This book reports the latest development and trends in the low Re number aerodynamics, transition from laminar to turbulence, unsteady low Reynolds number flows, experimental studies, numerical transition modelling, control of low Re number flows, and MAV wing aerodynamics. This book focuses particularly on: (1) a review and brief information study on low Reynolds number flows and transition as an introduction to low Re number aerodynamics (Chapter 1), (2) transition modelling (Chapters 2-4), flow control (Chapters 5-7).

172p greengrass304 18-09-2012 70 10   Download