refers to the arithmetic mean, the sum of the numbers divided by how many numbers are averaged.
Example: Most of us understand the word "average" because everyday usage generally refers to numbers or groups that have a normal distribution
es: valor promedio
Boundary conditions
noun
In mathematics, in the field of differential equations, a boundary value problem is called the set of a differential equation and the boundary or boundary conditions.
Example: Many of the first problems of boundary conditions have been studied using the Dirichlet problems,
es: Condiciones de frontera
Emissivity
noun
is the proportion of thermal radiation emitted by a surface or object due to its temperature
Example: The total emissivity is obtained by integration over the entire electromagnetic spectrum and all space
es: Emisividad
Energy balance
noun
The energy balance is a relationship of the energy that enters and leaves a system, that is, it is the study of the energy changes of a system
Example: The application of the energy balance is essential in industrial processes and physical transformations in different areas of the industry, such as oil, manufacturing, food, among others.
es: Balance de energía
Heat conduction equation
noun
Transport phenomena are those processes in which there is a net transfer or transport of matter, energy or linear momentum in large or macroscopic quantities. These physical phenomena have common features that can be described by the differential equation for one-dimensional propagation.
Example: The heat conduction equation can be derived by performing
an energy balance on a differential volume element.
es: Ecuación de transferencia de calor
Heat flux
The heat flux or thermal flux is a flow of energy per unit area per unit time
Example: Fourier's law is an important application of heat flux
es: Flujo de calor
heat generation
noun
Heat generation is called the transformation of some form of energy into thermal energy, either electrical by resistance of wire, exothermic chemical reactions in a solid and nuclear reactions in nuclear fuel rods.
Example: Heat generation is usually expressed per unit volume of the medium whose unit is W / m3
es: generación de calor
Insulation
noun
Thermal insulation is the set of materials and installation techniques that are applied in the construction elements that separate a heated space from the outside or from other spaces to reduce the transmission of heat between them
Example: The most common case is the insulation of buildings to minimize heat losses in winter and gains in summer
es: Aislamiento
Internal energy
noun
The internal energy is the result of the contribution of the kinetic energy of the molecules or atoms that constitute it, of their energies of rotation, translation and vibration, in addition to the intermolecular potential energy due to gravitational forces.
Example: The internal energy does not include the translational or rotational kinetic energy of the system as a whole. Nor does it include the potential energy that the body may have due to its location in an external gravitational or electrostatic field.
es: Energía interna
surface
noun
The outermost part of a body that limits or separates it from its surroundings.
Example: The sun is a ball of incandescent gas, what we see is its surface
es: superficie
temperature
noun
Degree or thermal level of a body or the atmosphere.
Example: The temperature of the coffee in a cup can be the same as the temperature of the coffee in a 5-liter jug
es: temperatura
Thermal conductivity
noun
Thermal conductivity is a physical property of materials that measures heat conduction capacity.
Example: Thermal conductivity is an intensive magnitude because it does not depend on mass and by dividing the portion of matter into small pieces its properties are not additive
es: Conductividad térmica
Thermal diffusivity
noun
Thermal diffusivity, in heat transfer problems, is the value obtained by dividing the thermal conductivity of a certain material divided by the product of its density value and its specific heat capacity.
Example: Thermal diffusivity is directly proportional to the thermal conductivity of a material, and inversely proportional to its density and specific heat.
es: Difusividad térmica
Thermal symmetry
noun
It occurs as a result of symmetry in imposed thermal conditions. Where it does not present heat flux in the central plane if not to the closest point of the surface.
Example: In the case of cylindrical or spherical bodies, it indicates that it has thermal symmetry with respect to the center line, so the derivative of the temperature with respect to r will be zero at the center line
es: Simetría térmica
unit of volume
noun
A unit of volume is a unit of measurement for measuring volume or capacity, the extent of an object or space in three dimensions.
Example: The unit of measurement for volume in the International System of Units is the cubic meter
