CHEMISTRY GLOSSARY

Lewis number    →   Lewisova značajka

Lewis number (Le) is a dimensionless quantity used in fluid mechanics, defined by

where a is thermal diffusivity and D is diffusion coefficient.

Mach number    →   Machova značajka

Mach number (Ma) is a dimensionless quantity used in fluid mechanics, defined by

where v is velocity and c is the speed of sound.

Navier-Stokes equations    →   Navier-Stokesove jednadžbe

Navier-Stokes equations are a set of complex equations for the motion of a viscous fluid subject to external forces.

Froude number    →   Froudova značajka

Froude number (Fr) is a dimensionless quantity used in fluid mechanics, defined by

where v is velocity, l is length, and g is acceleration due to gravity.

latex    →   lateks

Latex, also known as rubber or natural latex, is a milky fluid derived from the rubber tree. The latex is a colloid of caoutchouc (25-35%) dispersed in water (60-75%), which forms rubber by coagulation. The term is also applied to artificial emulsions of natural or artificial rubber, or of certain synthetic resins (such as polyvinyl acetate or polyvinyl chloride). It is used in a wide variety of consumer products, including rubber gloves, tubing, condoms, rubber bands, etc.

Nusselt number    →   Nusseltova značajka

Nusselt number (Nu) is a dimensionless quantity used in fluid mechan-ics, defined by

where h is coefficient of heat transfer, l is length, and k is thermal conductivity.

Peclet number    →   Pecletova značajka

Péclet number (Pe) is a dimensionless quantity used in fluid mechanics, defined by

where v is velocity, l is length, and a is thermal diffussivity.

Prandtl number    →   Prandtlova značajka

Prandtl number (Pr) is a dimensionless quantity used in fluid mechanics, defined by

where η is viscosity, ρ is density, and a is thermal diffusivity.

Rankine cycle    →   Rankineov ciklus

Rankine cycle is a thermodynamic cycle which can be used to calculate the ideal performance of a heat engine that uses a condensable vapour as the working fluid.

SFC    →   SFC

SFC is abbreviation for supercritical fluid chromatography.