Imaginary volume through which a substance's flow is modeled and analyzed
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In continuum mechanics and thermodynamics, a control volume (CV) is a mathematical abstraction employed in the process of creating mathematical models of physical processes. In an inertial frame of reference, it is a fictitious region of a given volume fixed in space or moving with constant flow velocity through which the continuuum (a continuous medium such as gas, liquid or solid) flows. The closed surface enclosing the region is referred to as the control surface.[1]
At steady state, a control volume can be thought of as an arbitrary volume in which the mass of the continuum remains constant. As a continuum moves through the control volume, the mass entering the control volume is equal to the mass leaving the control volume. At steady state, and in the absence of work and heat transfer, the energy within the control volume remains constant. It is analogous to the classical mechanics concept of the free body diagram.
^G.J. Van Wylen and R.E. Sonntag (1985), Fundamentals of Classical Thermodynamics, Section 2.1 (3rd edition), John Wiley & Sons, Inc., New York ISBN 0-471-82933-1
In continuum mechanics and thermodynamics, a controlvolume (CV) is a mathematical abstraction employed in the process of creating mathematical models...
Volumecontrol can refer to: Volumecontrolled continuous mandatory ventilation Potentiometer, a feature on audio equipment for adjusting the sound level...
Volume is a measure of regions in three-dimensional space. It is often quantified numerically using SI derived units (such as the cubic metre and litre)...
effectively reduces the volume if the signal is strong and raises it when it is weaker. In a typical receiver the AGC feedback control signal is usually taken...
currently regulated by VolumeControl or Pressure Control. In pressure controlled breaths a tidal volume achieved is based on how much volume can be delivered...
called a constant-volume process, an isovolumetric process, or an isometric process, is a thermodynamic process during which the volume of the closed system...
dynamics, the volumetric flow rate (also known as volume flow rate, or volume velocity) is the volume of fluid which passes per unit time; usually it is...
They control functions such as power, volume, channels, playback, track change, energy, fan speed, and various other features. Remote controls for these...
conservation of mass requires that the time derivative of the mass inside a controlvolume be equal to the mass flux, J, across its boundaries. Mathematically...
temperature. The advantages of VAV systems over constant-volume systems include more precise temperature control, reduced compressor wear, lower energy consumption...
is usually called a controlvolume, and it may or may not correspond to physical walls. If we choose the shape of the controlvolume such that all flow...
plane, a control surface in submarines Control surface (fluid dynamics), a surface—enclosing a controlvolume—through which a fluid flow occurs This...
any fixed controlvolume (for example, a spherical volume)—enclosed by a control surface—the rate of change of the mass contained in that volume is equal...
Thermal expansion is the tendency of matter to change its shape, area, volume, and density in response to a change in temperature, usually not including...
be controlled by the ventilator, either pressure or volume. Typically, in AC/CMV, it is volume. In AC/CMV, the ventilator will deliver a set volume whenever...
a fluid parcel is the total time that the parcel has spent inside a controlvolume (e.g.: a chemical reactor, a lake, a human body). The residence time...
the relative position of the hands and control oscillators for frequency with one hand, and amplitude (volume) with the other. The electric signals from...
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