The objective to make this glossary is to have the knowledge about the unknown words that appers in the reading.
Convection heat transfer coefficient
It´s a phrase
The convective heat transfer coefficient, h, can be defined as: The rate of heat transfer between a solid surface and a fluid per unit surface area per unit temperature difference.
Example: The convective heat transfer coefficient is dependent upon the physical properties of the fluid and the physical situation.
es: Coeficiente de transferencia de calor por convección.
Critical Reynold’s number
It´s a phrase.
The critical Reynolds number is associated with the laminar-turbulent transition, in which a laminar flow becomes turbulent.
Example: A critical Reynolds number is determined as a limit where the laminar flow changes to turbulent flow.
es: Número crítico de Reynolds
Friction Coefficient
It´s a phrase
Coefficient of friction is a measure of the amount of friction existing between two surfaces.
Example: When you find a coefficient of friction, you're calculating the resistance to motion at the interface of two surfaces of similar or dissimilar materials.
es: Coeficiente de fricción
Kinematic viscosity
It´s a phrase
Kinematic viscosity is a measure of a fluid's internal resistance to flow under gravitational forces.
Example: The units of kinematic viscosity are established on time and area.
es: Viscosidad cinemática
Laminar flow
It´s a phrase
Laminar flow or laminar flow is the movement of a fluid when it is orderly, stratified or smooth.
Example: In a laminar flow, the fluid moves in parallel sheets without intermixing and each fluid particle follows a smooth path, called streamline.
es: Flujo laminar.
Nusselt number
It´s a phrase.
The Nusselt number is a dimensionless number that measures the increase in heat transfer from a surface through which a fluid flows compared to the heat transfer if it occurred by conduction alone.
Example: The Nusselt number is the ratio of convective to conductive heat transfer across a boundary.
es: El número de Nusselt.
Prandtl number
It´s a phrase
The Prandtl number is a dimensionless number proportional to the quotient of the rate of diffusion of the momentum quantity and the thermal diffusivity.
Example: Prandtl number (Pr) is defined as the ratio of momentum diffusivity (kinematic viscosity) to thermal diffusivity.
es: Número de Prandtl
Reynold number
It´s a phrase
The Reynolds number is a dimensionless number used in fluid mechanics, reactor design and transport phenomena to characterize the motion of a fluid. Its value indicates whether the flow follows a laminar or turbulent pattern.
Example: The Reynolds number is the ratio of inertial forces to viscous forces within a fluid which is subjected to relative internal movement due to different fluid.
es: Número de Reynolds
Shear stress
Phrase
The shear stress or shear stress is that which, fixed to a plane, acts tangentially to it.
Example: Shear stress, often denoted by τ (Greek: tau), is the component of stress coplanar with a material cross section.
es: Esfuerzo cortante
Turbulent flow
It´s a phrase
In terms of fluid dynamics, turbulence or turbulent flow is a flow regime characterized by low momentum diffusion, high convection and rapid spatiotemporal changes in pressure and velocity.
Example: Turbulent flow, type of fluid (gas or liquid) flow in which the fluid undergoes irregular fluctuations, or mixing, in contrast to laminar flow.
