15 Glossary of the second reading of the partial heat transfer terms
In this glossary we will see some words that help to learn the subject and the English language
boundary conditions
noun
a condition that is required to be satisfied at all or part of the boundary of a region in which a set of differential equations is to be solved.
Example: Expertise is necessary to apply the appropriate BOUNDARY CONDITIONS and forces to the model to extract the relevant data.
es: condiciones de borde
emissivity
noun
the relative power of a surface to emit heat by radiation : the ratio of the radiant energy emitted by a surface to that emitted by a blackbody at the same temperature
Example: The amount of thermal radiation depends on the emissivity of the object.
es: emisividad
energy balance
noun
the state at which the number of calories eaten equals the number of calories used.
Example: From the fit shown in figure 4 the work function for the cathode can also be obtained: although as noted in section 4 this value includes the contact potential between the cathode and the anode in the ENERGY BALANCE and therefore it cannot be compared to any standard values.
es: balance de energía
heat conduction equation
noun
The equation that describes thermal conduction is known as Fourier's law
Example: La ecuación de conducción de calor es una ecuación parcial que describe la distribución de calor
es: ecuación de conducción de calor
heat flux
noun
Heat flux or thermal flux, sometimes also referred to as heat flux density, heat-flow density or heat flow rate intensity is a flow of energy per unit of area per unit of time.
Example: The second experiment measured sensible HEAT FLUX (H ) by the eddy correlation method.
es: flujo de calor
insulation
noun
the action of insulating something.
Example: The high temperatures of 650°C - 700°C may still be enough to damage INSULATION and anneal the conductor though.
es: aislamiento
internal energy
noun
The internal energy of a thermodynamic system is the energy contained within it. It is the energy necessary to create or prepare the system in any given internal state.
Example: This means the system does work on its surroundings, and the change in INTERNAL ENERGY (U) is equal to the heat added (Q) plus the work done (W).
es: energía interna
negligible
adjetive
so small or unimportant as to be not worth considering; insignificant.
Example: It was assumed that this would have a NEGLIGIBLE affect.
es: despreciable
plate
verb
cover (a metal object) with a thin coating or film of a different metal.
Example: If these grave goods (Figure 1, PLATE 1) are stylistically distinct they could have been made exclusively for this individual.
es: plato
specified temperature
noun
the heat in calories required to raise the temperature of one gram of a substance one degree Celsius
Example: This quickly passed into the holding tube where it was held at the SPECIFIED TEMPERATURE for approximately 1 - 1.5 seconds.
es: temperatura especificada
steady
noun
firmly fixed, supported, or balanced; not shaking or moving.
Example: After 5 minutes the calibration of a -20 to +20 x 0.1 o C thermometer was checked by immersing it in the Dewar flask containing ice and the water, stirring, and waiting until the reading was STEADY.
es: firme
thermal conductivity
noun
the rate at which heat passes through a specified material, expressed as the amount of heat that flows per unit time through a unit area with a temperature gradient of one degree per unit distance.
Example: The THERMAL CONDUCTIVITY and thickness of the material determine the rate of heat penetration.
es: conductividad térmica
thermal diffusivity
noun
Thermal diffusivity is the thermal conductivity divided by density and specific heat capacity at constant pressure
Example: Initial spore load: The severity of the process depends on the initial spore load; good factory hygiene keeps this low. 8.Thermophysical properties : The THERMAL DIFFUSIVITY is the controlling factor.
es: difusividad térmica
thermal symmetry
noun
A heat transfer problem that is symmetric about a plane, line, or point is said to have thermal symmetry about that plane, line, or point. The thermal symmetry boundary condition is a mathematical expression of this thermal symmetry.
Example: Another very important case, that can be used for solving heat transfer problems involving fuel rods, is the thermal symmetry
es: simetría térmica
thickness
noun
the distance between opposite sides of something.
Example: After selecting the optimal needle height and layer THICKNESS, a test array was fabricated with needle spacing varying from 500-800µm.
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