Global Information Lookup Global Information

Inertance information


Inertance is a measure of the pressure difference in a fluid required to cause a unit change in the rate of change of volumetric flow-rate with time. The base SI units of inertance are kg m−4 or Pa s2 m−3 and the usual symbol is I.

The inertance of a tube is given by:

where

is the density (with dimensionality of mass per volume) of the fluid
is the length of the tube
is the cross-sectional area of the tube

The pressure difference is related to the change in flow-rate by the equation:

where

is the pressure of the fluid
is the volumetric flow-rate (with dimensionality of volume per time)

This equation assumes constant density, that the acceleration is uniform, and that the flow is fully developed "plug flow". This precludes sharp bends, water hammer, and so on.

To some, it may appear counterintuitive that an increase in cross-sectional area of a tube reduces the inertance of the tube. However, for the same mass flow-rate, a lower cross-sectional area implies a higher fluid velocity and therefore a higher pressure difference to accelerate the fluid.

In respiratory physiology, inertance (of air) is measured in cmH2O s2 L−1.

1 cmH2O s2 L−1 ≈ 98100 Pa s2 m−3.

Using small-signal analysis, an inertance can be represented as a fluid reactance (cf. electrical reactance) through the relation:

where

is the frequency in Hz.

and 25 Related for: Inertance information

Request time (Page generated in 0.5482 seconds.)

Inertance

Last Update:

flow-rate with time. The base SI units of inertance are kg m−4 or Pa s2 m−3 and the usual symbol is I. The inertance of a tube is given by: I = ρ ℓ A {\displaystyle...

Word Count : 324

Inert

Last Update:

Look up inert or inertness in Wiktionary, the free dictionary. Inert may refer to: Chemically inert, not chemically reactive Inert gas Noble gas, historically...

Word Count : 125

Inert gas

Last Update:

An inert gas is a gas that does not readily undergo chemical reactions with other chemical substances and therefore does not readily form chemical compounds...

Word Count : 1428

Inerter

Last Update:

Inerter may refer to: Inerting system, a device to increase the safety of a closed tank that contains highly flammable material Inerter, an element of...

Word Count : 78

Inerting system

Last Update:

An inerting system decreases the probability of combustion of flammable materials stored in a confined space. The most common such system is a fuel tank...

Word Count : 2074

Inertial navigation system

Last Update:

An inertial navigation system (INS; also inertial guidance system, inertial instrument) is a navigation device that uses motion sensors (accelerometers)...

Word Count : 5831

Inertial frame of reference

Last Update:

In classical physics and special relativity, an inertial frame of reference (also called inertial space, or Galilean reference frame) is a frame of reference...

Word Count : 7870

Inert waste

Last Update:

Inert waste is waste which is neither chemically nor biologically reactive and will not decompose or only very slowly. Examples of this are sand, concrete...

Word Count : 77

Chemically inert

Last Update:

chemically inert is used to describe a substance that is not chemically reactive. From a thermodynamic perspective, a substance is inert, or nonlabile...

Word Count : 583

Inertial wave

Last Update:

Inertial waves, also known as inertial oscillations, are a type of mechanical wave possible in rotating fluids. Unlike surface gravity waves commonly seen...

Word Count : 1113

Inert salt

Last Update:

In chemistry, an inert salt is a salt used to adjust the ionic strength of a solution. This is usually done in equilibrium or kinetic studies in order...

Word Count : 246

Inert knowledge

Last Update:

Inert knowledge is information which one can express but not use. The process of understanding by learners does not happen to that extent where the knowledge...

Word Count : 232

Inertial platform

Last Update:

An inertial platform, also known as a gyroscopic platform or stabilized platform, is a system using gyroscopes to maintain a platform in a fixed orientation...

Word Count : 74

Inertial reference unit

Last Update:

An inertial reference unit (IRU) is a type of inertial sensor which uses gyroscopes (electromechanical, ring laser gyro or MEMS) and accelerometers (electromechanical...

Word Count : 172

Inertial measurement unit

Last Update:

An inertial measurement unit (IMU) is an electronic device that measures and reports a body's specific force, angular rate, and sometimes the orientation...

Word Count : 2076

Inertial switch

Last Update:

An inertial switch is a switch, firmly mounted upon a vehicle or other mobile device, that triggers in the event of shock or vibration. It is a part of...

Word Count : 261

Inert gas asphyxiation

Last Update:

Inert gas asphyxiation is a form of asphyxiation which results from breathing a physiologically inert gas in the absence of oxygen, or a low amount of...

Word Count : 4128

ISRO Inertial Systems Unit

Last Update:

inertial systems, spacecraft inertial systems, inertial sensors evaluation and simulation, inertial system production, inertial systems electronic production...

Word Count : 115

Mass

Last Update:

results from that force. An object with small inertial mass will accelerate more than an object with large inertial mass when acted upon by the same force....

Word Count : 10141

Dummy round

Last Update:

A dummy round or drill round is a round that is completely inert, i.e., contains no primer, propellant, or explosive charge (filling). It is used to check...

Word Count : 156

Inertial manifold

Last Update:

In mathematics, inertial manifolds are concerned with the long term behavior of the solutions of dissipative dynamical systems. Inertial manifolds are finite-dimensional...

Word Count : 1941

Inertia damper

Last Update:

and to reapply those forces as a smaller force over a longer period. Inertial compensators are also used in simulators or rides, making them more realistic...

Word Count : 417

Local reference frame

Last Update:

The term is most often used in the context of the application of local inertial frames to small regions of a gravitational field. Although gravitational...

Word Count : 325

Inertial balance

Last Update:

An inertial balance is a device that allows the measurement of inertial mass (as opposed to gravitational mass for a regular balance) that can be operated...

Word Count : 243

Inert gas generator

Last Update:

Inert gas generator (IGG) refers to machinery on board marine product tankers. Inert gas generators consist distinctively of a gas producer and a scrubbing...

Word Count : 199

PDF Search Engine © AllGlobal.net