
	Where results make sense

Topic: Flow measurement

Related Topics

Compressible flow

Fluid Mechanics

Fluid Dynamics

Laminar flow

Reynolds number

Fluid power

Turbulence

Incompressible flow

Hydrostatic pressure

Doppler shift

Rheology

Flux

Fluid

Computational Fluid Dynamics

Stream function

	A Flow Measurement Orientation
		It is for this reason that a flow restriction causes an increase in the flowing velocity and also causes a drop in the static pressure of the flowing fluid.
		One of the most common flow measurement mistakes is the reversal of this sequence: instead of selecting a sensor which will perform properly, an attempt is made to justify the use of a device because it is less expensive.
		When measuring the flow of compressible materials, volumetric flow is not very meaningful unless density (and sometimes also viscosity) is constant.
	www.tcomega.com /literature/transactions/volume4/T9904-06-FLOW.html (3246 words)

	Flow measurement - Wikipedia, the free encyclopedia
		Flow measurement is the quantification of bulk fluid or gas movement.
		Another method of measurement, known as a venturi meter, is to constrict the flow in some fashion, and measure the differential pressure that results across the constriction.
		Measurement of the doppler shift resulting in reflecting an ultrasonic beam off the flowing fluid is another recent, accurate innovation made possible by electronics.
	en.wikipedia.org /wiki/Flow_measurement (1044 words)

	Micro hydropower basics: measuring flow (Site not responding. Last check: 2007-10-19)
		A flow measurement weir is a weir with a notch in it through which all the water in the stream flows.
		Upstream, the distance between the point of measurement and the crest of the weir should be at least twice the maximum head to be measured.
		The flow rate is therefore inversely proportional to the degree of conductivity of the cloud.
	www.microhydropower.net /flow.html (1030 words)

	OMEGA ENGINEERING - Flow Control
		With most liquid flow measurement instruments, the flow rate is determined inferentially by measuring the liquid's velocity or the change in kinetic energy.
		At very low velocities or high viscosities, R is low, and the liquid flows in smooth layers with the highest velocity at the center of the pipe and low velocities at the pipe wall where the viscous forces restrain it.
		Measurements are made by sending sound pulses from a sensor to the surface of the liquid, and timing the echo return.
	www.omega.com /techref/flowcontrol.html (5120 words)

	2.2 Flow Measurement
		Flow measurement is critical to determine the amount of material purchased and sold, and in these applications, very accurate flow measurement is required.
		Flowing systems require energy, typically provided by pumps and compressors, to produce a pressure difference as the driving force, and flow sensors should introduce a small flow resistance, increasing the process energy consumption as little as possible.
		Turbine: As fluid flows through the turbine, it causes the turbine to rotate with an angular velocity that is proportional to the fluid flow rate.
	www.pc-education.mcmaster.ca /instrumentation/flow.htm (1380 words)

	[No title]
		Flows are, however, bidirectional, reflecting the forward and reverse packets of a protocol interchange or 'session.' Maintaining two sets of counters in the meter's flow record makes the resulting flow data much simpler to handle, since analysis programs do not have to gather together the 'forward' and 'reverse' components of sessions.
		Users of the Traffic Flow Measurement system should analyse their requirements carefully and assess for themselves whether it is more important to attempt to collect flow data at normal granularity (increasing the collection frequency as needed to keep up with traffic volumes), or to accept flow data with a coarser granularity.
		Flow records may be reclaimed if they have been idle for at least this amount of time, and have been collected in accordance with the current collection criteria.
	www.ietf.org /rfc/rfc2063.txt (10878 words)

	Frankford Hospitals - Peak Flow Measurement
		Peak flow measurement may be obtained using a spirometer, an instrument with a mouth piece that measures the amount of air breathed in and/or out and the rate at which the air is inhaled and expelled from the lungs.
		Peak flow measurement using a peak flow meter is particularly useful for individuals with asthma.
		Peak flow measurement may be performed one or more times daily at the same time of day, whenever you are experiencing early warning signs of an asthma attack, or as otherwise directed by your physician.
	www.frankfordhospitals.org /healthinfo/t_and_p/pulmon/TP094.html (1733 words)

	Flow Measurement Laboratory
		Flow transducers are used in a range of applications that include the fuel injection system on your car, water flows (domestic and industrial), chemical processing plants, power plants, cooling systems, and medical applications.
		Flow rate is indicated by a signal that ranges from 0 to 5V for 0 – 20 SLPM at 15V excitation.
		The Bernoulli equation forms the basis for flow metering through orifii; the principle is to apply the equation at two planes across the flow; upstream of the orifice where the flow is quite slow and at the orifice itself where the flow is significantly faster.
	www.mines.edu /academic/courses/eng/EGGN383/mel2/flow (6108 words)

	Gasflows: Market Research about flow measurement in the Gas Industry
		Flow measurement is primarily concerned with measuring the flow of liquids and gases.
		Meters used to measure gas or water entering a building or plant for the purpose of billing the plant for their use of gas or water are considered to be utility meters.
		DP flowmeters are used to measure the flow of liquid, gas, and steam.
	www.gasflows.com (1669 words)

	Steam flow meters measurement
		Photon Control is currently developing a line of optical flow meters for use in measurement of the flow rates of gases and clear liquids in process control and custody transfer applications.
		In steam measurement for example, a very significant amount of damage is caused by the “hammer” of high pressure condensate which routinely builds up in the flow.
		Measuring of saturated steam is a challenging task because of high operating temperature (200C and higher) and a risk of the “hammer” effect.
	www.flowmeterdirectory.com /flowmeter_artc/flowmeter_artc_03112501.html (1183 words)

	Peak Flow Measurement
		Peak flow measurement may be obtained using a spirometer, an instrument with a mouth piece that measures the amount of air breathed in and/or out and the rate at which the air is inhaled and expelled from the lungs.
		Peak flow measurement using a peak flow meter is particularly useful for individuals with asthma.
		Peak flow measurement may be performed one or more times daily at the same time of day, whenever you are experiencing early warning signs of an asthma attack, or as otherwise directed by your physician.
	www.stjosephsatlanta.org /greystone/t_and_p/pulmon/TP094.html (1693 words)

	Pitot Tube Flow Measurement
		The elementary fluid velocity measurement system in Figure 1 works by converting the kinetic energy of a small part of the flowing fluid into potential energy in the manometer fluid in the U-tube.
		Translation of flow velocity into the manometer fluid height difference involves gravity's effect on the flowing and manometer fluids and the relative densities of the fluid flowing in the pipe and the manometer fluid.
		Obviously, if the fluid in the pipe and the manometer fluid were both water, we would get no measurement because the water would just circulate freely through the U-tube, entering through the velocity pressure tube and exiting through the static pressure tube.
	www.wsu.edu /~gmhyde/433_web_pages/433fluidflow/pitot_tube.html (299 words)

	Flow Measurement
		Ultimately, a point is reached where the flow area is large enough to allow the entire volume of the fluid to flow past the float.
		One way to change the capacity, or flow range, of a rotameter is to change the float material, and thus its density, while keeping the flow tube and float size constant.
		Mass flow measuring devices generate a signal which is proportional to the mass flow of gas by detecting heat transported in an area of the gas stream.
	www.megs.ca /products/prod10.htm (2362 words)

	Flow Measurement Experiment
		It is not possible to examine all types of flow transducers in the time available to us in MEL II; however we can begin to understand how some transducers work, how to use them, and how to determine their accuracy.
		For most liquids, the mass flow rate and the volumetric flow rate are equivalent since the density of a liquid is typically an insensitive function of temperature and pressure.
		Flow meters are typically calibrated in terms of standard conditions (flow in standard liters per minute rather than in liters per minute).
	egweb.mines.edu /eggn350/spring02/flow.htm (5403 words)

	Flow Measurement - Internet Resources
		Flow measurement is one of the most important process measurements made.
		Process flow sensing is a need that will remain beyond the time when Scotty has to monitor the flow of matter and antimatter to the dilithium crystals.
		Flowmeters Pass the Muster (http://www.manufacturing.net/magazine/ce/archives/1998/ctl0402.98/04e407.htm) Measuring the flow of fluids is critical in many industrial plants.
	www.isa.org /~sarni/flow.htm (610 words)

	Ultrasonic Flow Measurement Technologies
		The flow meter operates by alternately transmitting and receiving a burst of sound energy between the two transducers and measuring the transit time that it takes for sound to travel between the two transducers.
		This shift is the so-called Doppler frequency shift, proportional to the flow velocity.
		The flow rate of a pipe flow is then obtained by computing the product of the velocity and the cross-section area of the pipe.
	www.shenitech.com /flowmeas.htm (418 words)

	Flow Measurement
		A Laureate 6-digit digital counter with an FR dual-channel signal conditioner board is ideal for flow measurement and flow totalizing using pulse signals from turbine flow meters.
		Scale and offset are programmable for direct display in flow measurement rate units such as gallons per minute (GPM) or liters per second, or in flow measurement volume units such as gallons or liters.
		A Laureate 6-digit digital counter with a VF dual-channel signal conditioner board is ideal for flow measurement and flow totalizing using analog signals from differential pressure flow meters and other flow meter transducers with an analog output, such as 0-10 V or 4-20 mA.
	www.laurels.com /flow-measurement.html (248 words)

	MFC - ASME Flow Measurement Standards (ASME)
		All other instruments or devices required for the measurement or transmission of the differential pressures are known as secondary elements, and in combination are referred to as the secondary devices.
		This standard applies only to the steady flow of single-phase gases and deals with devices for which direct calibration experiments have been made, sufficient in number and quantity to enable inherent systems of applications to be based on their results and coefficients to be given with certain predictable limits of uncertainty.
		Critical flow exists when the mass flow rate through the venturi nozzle is the maximum possible for the existing upstream conditions.
	www.normas.com /ASME/pages/MFC.html (1832 words)

	Flow measurement
		This versatile flow switch is suitable for use on a variety of metal and plastic pipes.
		The flowmeter utilises the non-intrusive Doppler principle to measure the mean velocity and is particularly useful as a temporary flow indicator or as a working tool to establish flow conditions in field or plant installations.
		Where flow measurement in deeper channels or vessels is required the probe can be fixed to along pole (up to 10 metres).
	www.omniinstruments.co.uk /flow/flow.html (1792 words)

	Flow Measurement and Flow Control Solutions supplied by Flowline
		We supply flow measurement and flow control solutions for all industries.
		Flowline is an ISO9001:2000 approved company with over 15 years experience in supplying flow measurement solutions for all kinds of applications including steam, water, air and effluent flow.
		Flow Meters of all technologies are available including non-invasive and insertion systems ideal for retrofitting into live systems without shutdown.
	www.flowline.co.uk /flow_measurement.html (226 words)

	Flow Measurement By Venturimeter and Ori \| Engineering Products Manufacturer Laboratory Equipments Microscope Exporters
		A unit consists a supply piping connected to a transparent venturi and orifice.
		tappings to measure pressure difference across venturi and orifice which are connected to differential manometer.
		The actual flow rate can be measured with the help of measuring tank and both the meters can be calibrated.
	interlabs.exportersindia.com /flow-measurement-by-venturimeter-and-ori.htm (95 words)

	Ultrasonic Flow Measurement
		Through non-intrusive measurement from the outside, the most aggressive and high pressure fluids can be measured without a problem.
		With a flowing fluid, the ultrasonic waves require differing lengths of time (flow dependent) to reach the correspondong sensor.
		This transit-time difference, measured by Prosonic Flow, is directly proportional to the flow velocity.
	www.keison.co.uk /endress/endress1.htm (292 words)

	RIGZONE - Fluid Flow Measurement, 2nd Ed.
		There is a tendency to make flow measurement a highly theoretical and technical subject, but what most influences quality measurement is the practical application of meters, metering principles and metering equipment, and the use of quality equipment that can continue to function through the years with proper maintenance.
		Fluid Flow Measurement, Second Edition provides a review of basic laws and principles, an overview of physical characteristics and behavior of gases and liquids, and a look at the dynamics of flow.
		This guide is dedicated to condensing and sharing the authors' extensive experience in solving flow measurement problems with design engineers, operating personnel (from top supervisors to the newest testers), professors, students, consultants, engineers for the manufacturers of flow meter equipment, worldwide practitioners, theorists, and people just getting into the business.
	www.rigzone.com /store/product.asp?p_id=279 (219 words)

	Flow Measurement
		Siemens comprehensive line of transmitters range from simple flow indicators to highly sophisticated, bus compatible measurement converters. Siemens flow transmitters are engineered for high performance, easy installation, operation and maintenance even in some of the most demanding environments.
		The SITRANS FM is designed to measure the flow of almost any electrically conductive liquid, as well as sludges, pastes and slurries.
		SITRANS F C flowmeters are used to measure liquids and gases. In addition to mass flow, the Coriolis mass flowmeter, provides information on media density, fraction and temperature.
	www.sea.siemens.com /ia/product/inflow_xmtr.html (166 words)

	Flow Measurement and Control Products for Industrial and Manufacturing Applications
		In the industrial arena, measuring the flow of liquids and gases used in a wide range of manufacturing processes demands superior instrument performance.
		From measuring diesel fuel, heavy oil and hydraulic fluid, to chemical dispensing and blending/batching, industrial applications present difficult flow metering challenges.
		Flow Technology can also design and manufacture a wide range of custom flow measurement devices and ancillary electronics based on our customers' specific application requirements.
	www.ftimeters.com /pages/industry.html (371 words)

	Flow Meters Ultrasonic and Portable Clamp On Flowmeter
		RS Hydro is a multi-disciplined consultancy providing specialist expertise in process measurement technology and in particular clamp on, non contact, non intrusive and ultrasonic flow and level sensors to tackle technological issues facing clients over a large range of work in the water, environmental and industrial sectors, worldwide.
		The ultrasonic flow meter is a portable non intrusive flow metering device based on time-of-flight (transit time) or doppler technologies.
		Portable and permanent open channel flow meters are regularly supplied and installed for industrial and environmental applications.
	www.rshydro.co.uk (413 words)

	Welcome to Flow Control - Solutions for the Fluid Handling Industry
		They also offer a low-cost alternative to some other flow measurement systems and are noninvasive, thus eliminating wear on parts exposed to the flow stream.
		To translate this concept to a flow measurement application, consider a pair of transducers, A and B, located upstream and downstream of the flow respectively.
		With swirls, the flow velocity of the liquid is no longer parallel to the axis of the pipe.
	www.flowcontrolnetwork.com /issuearticle.asp?ArticleID=135 (1603 words)

Try your search on: Qwika (all wikis)