Permeability (/ˌpɜːrmiəˈbɪlɪti/) is the quality of a substance that enables it to pass through a barrier. The spelling of "permeability" can be explained through the International Phonetic Alphabet (IPA). The symbol "ˈ" denotes the primary stress on the second syllable, "mi". The "e" in the second syllable is pronounced as "ə", which represents the schwa sound. The "a" in the third syllable is pronounced as "ɪ", which represents the short "i" sound. The "i" in the final syllable is pronounced as "i", which represents the long "e" sound.
Permeability, in the context of science and engineering, refers to the property of a material or substance that allows the flow or passage of other substances, such as liquid, gas, or solutes, through it. It is a measure of how easily a substance can be penetrated by another substance.
In physics, permeability is commonly used to describe the ability of a substance to allow the flow of magnetic lines of force through it. This property is known as magnetic permeability and is typically utilized in assessing the behavior of magnetic materials. High magnetic permeability materials, such as iron and nickel, are commonly used in the construction of magnetic cores in transformers and other electrical devices.
In geology and soil mechanics, permeability refers to the ability of rocks or soils to allow the flow of fluids through the interconnected void spaces. It is an important parameter in assessing the movement of groundwater and the infiltration of liquids into soil. Permeability is often influenced by factors such as porosity, pore size distribution, and the presence of fractures or fissures in the material.
Permeability is typically measured in units of velocity or volume flow per unit area, such as meters per second or cubic meters per second per square meter. The concept of permeability is utilized in various scientific disciplines, including materials science, geology, hydrogeology, and engineering, to characterize the transport properties of substances and materials.
The quality or state of being permeable.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.
* The statistics data for these misspellings percentages are collected from over 15,411,110 spell check sessions on www.spellchecker.net from Jan 2010 - Jun 2012.
The word permeability is derived from the Latin word permeabilis, which means passable or pervious. It is formed by combining the prefix per- meaning through or across, and the Latin root meabilis meaning capable of being passed through.