Demonstration capabilities

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PRODUCTS

 

 

A robust item of equipment designed to reproduce the classic 

experiments of Professor Osborne Reynolds.

DEMONSTRATION CAPABILITIES

 

> To compute Reynolds number (R

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)

> To observe and quantify transitional flow

> To observe the paraboloid velocity profile 

ISSUE 

15

The latest version of this data sheet is available at: 

www.armfield.co.uk/f5

Laminar flow

Transitional laminar-turbulent flow

 

     

OSBORNE REYNOLDS’ APPARATUS – 

F5

F SERIES: BASIC FLUID MECHANICS

 

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ORDERING SPECIFICATION

 •   Floor standing apparatus to produce classic Osborne 

Reynolds’ experiments

•   Fluid enters a vertically mounted test section through 

a carefully profiled bellmouth from a constant 

head tank

•  An easily cleaned dye injection system is incorporated

•   Fluid flow is controlled by a needle point globe valve

•    Supply includes stilling bed, hoses and dye

DESCRIPTION

The Armfield Osborne Reynolds’ Apparatus can be 

bench or floor mounted and is designed for the 

vertical flow of a liquid through a precision bore 

glass tube. The use of a vertical direction for the flow 

compensates for the effect of any small deviations of 

the density of dye relative to that of the working fluid.

The operating fluid may be supplied from any 

small bore supply point by means of the flexible 

hose provided. Fluid enters a cylindrical constant 

head tank through a ring diffuser and then 

through a stilling bed to eliminate any gross 

variations of fluid velocity in the head tank.

This tank therefore provides uniform, low-

velocity head conditions upstream of the entry 

to the vertically mounted pipe test section. 

Fluid enters this section through a profiled 

bellmouth, designed to uniformly accelerate the 

fluid without any spurious inertial effects.

The cylindrical pipe test section is mounted 

inside a fabricated shroud that provides an 

uninterrupted background for observations of 

the dye trace behaviour. Dye solution is admitted 

to the test section through a fine diameter 

stainless steel tube and the rate of flow of dye is 

controlled by a needle valve on the outlet of the 

dye reservoir. The dye injection system can be 

readily removed for cleaning and maintenance.

The flow rate of the working fluid through the test 

section is regulated by a globe valve located in the 

base of the apparatus. The rate may be measured 

either volumetrically or by weighing (equipment 

for this purpose is not supplied). The apparatus 

is compatible with any means chosen to alter the 

kinematic viscosity of the fluid, either by using 

different fluids or by altering the temperature of a 

given fluid (the external circuit for this is not supplied).

The whole apparatus is mounted on a substantial 

fabricated steel support and a means is provided 

for levelling the apparatus to ensure the test 

section is vertical. The stilling bed, all necessary 

connecting hoses, an initial supply of dye and an 

instruction manual are supplied with the apparatus.

REQUIREMENTS

Water supply:   Up to 0.5 l/sec maximum

OVERALL DIMENSIONS

 

Height: 1.48m 

Diameter: 0.61m

SHIPPING SPECIFICATION

Volume:  

1.2m

3

 

Gross weight:  130kg

Head Office: 

Armfield Limited 

Bridge House, West Street, 

Ringwood, Hampshire 

BH24 1DY England

Telephone: [phone]

Fax: [phone]

E-mail: [e-mail]

U.S. Office: 

Armfield Inc. 

9 Trenton - Lakewood Road 

Clarksburg NJ 08510

Tel/Fax:  [phone] 

E-mail: [e-mail]

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* 

* Excluding DLMx range

©

2015 Armfield Ltd. All Rights Reserved

 

We reserve the right to amend these specifications without prior notice. E&OE    03/14/3k

Correct at time of going to press.

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