convection

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current

 [kur´ent]
1. something that flows.
2. specifically, electricity transmitted through a circuit.
alternating current a current that periodically flows in opposite directions; its amplitude fluctuates as a sine wave.
convection current a current caused by movement by convection of warmer fluid into an area of cooler fluid.
direct current a current that flows in one direction only; when modeled as a wave, its amplitude is constant. When used medically it is called galvanic current. This current has distinct and important polarity and marked secondary chemical effects.
galvanic current a steady direct current.
current of injury an electric current that flows between injured myocardium and normal myocardium, because such cells have a reduced membrane potential; it may be either diastolic or systolic.
current of injury, diastolic the current that flows from injured to noninjured tissue during electrical diastole.
current of injury, systolic the current that flows from healthy tissue to injured tissue during electrical systole.
inwardly rectifying current current that rectifies so that it passes more easily towards the interior of a cell.
leakage current the electrical current that exists in the parts or metal case of electrical equipment.
outwardly rectifying current current that rectifies so that it passes more easily towards the exterior of a cell.
potassium rectifying c's transmembrane currents that rectify inwardly or outwardly to make adjustments in cellular functions; they are mainly responsible for the repolarization phase of the action potential. There are at least six mechanisms by which potassium ions move across cardiac cell membranes in the role of rectifier.

con·vec·tion

(kon-vek'shŭn),
Conveyance of heat in liquids or gases by movement of the heated particles, as when the layer of water at the bottom of a heated pot rises or the warm air of a room ascends to the ceiling.
[L. con-veho, pp. -vectus, to carry or bring together]

convection

/con·vec·tion/ (kon-vek´shun) the act of conveying or transmission, specifically transmission of heat in a liquid or gas by bulk movement of heated particles to a cooler area.convec´tive

convection

[kənvek′shən]
Etymology: L, convehere, to bring together
(in physics) the transfer of heat through a gas or liquid by the circulation of heated particles.

con·vec·tion

(kŏn-vek'shŭn)
Conveyance of heat in liquids or gases by movement of the heated particles, as when the layer of water at the bottom of a heated pot rises or the warm air of a room ascends to the ceiling.
[L. con-veho, pp. -vectus, to carry or bring together]

convection

the propagation of heat through liquids and gases by the movement of the heated particles, increasing their kinetic energy.

convection

the act of conveying or transmission; specifically, transmission of heat in a liquid or gas by circulation of heated particles.
References in periodicals archive ?
A quasi-one dimensional thermodynamic model was developed in this paper to study the effect of varying engine parameters on the convective heat flux as a function of the crank angle throughout the important processes (compression, combustion and expansion) in the combustion chamber of a 6-cylinder turbocharged diesel engine.
The convective heat transfer coefficients under different drying conditions were obtained by comparing experimental data and the calculation results of Equation 5 as shown in Table 1.
Warming blanket with convective air warming system covered chest, both arms and head to keep body temperature normal (Fig.
Recently, Sajjad[16] considered MHD forced convective boundary layer flow of micropolar fluids past a shrinking porous sheet prescribed with variable heat flux and heat source.
In 1968, scientists theorized that even longer-lived and larger convection cells, big enough to span the entire convective zone, maintain the fast rotation researchers had long observed around the sun's equator; without such cells, the poles should rotate faster than the equator.
While all internal sensible heat gains are composed of both radiant and convective components, it is only the rate at which convective heat energy is removed from the zone air at a given point in time that contributes to the cooling load.
Dealing with convective activity seems to be a controversial subject, especially when it also includes a discussion of data-link weather information.
Wind shear had separated the center of circulation from this convective activity so, TRMM found virtually no rainfall near Nadine's center.
In large-scale models that look at regions or the entire globe, researchers substitute a stand-in called a parameterization to account for deep convective clouds.
Chomko, Heppner and others designed their weatherization curriculum to specifically address convective heat loss, which accounts for typically up to 40 percent of heat loss in the home.
Such a weather base provides for light convective showers, at least.