permeability
Noun: 1. The quality or state of being permeable; the property of a material or substance that allows liquids, gases, or other substances to pass through it. This is the core physical property described by the word. 2. Specifically, the rate or degree to which a fluid can flow through a porous material. This meaning is often used in scientific and engineering contexts.
The word "permeability" is a technical term primarily used in scientific, engineering, and geological fields. It describes how easily a substance (like water, air, or magnetic flux) can move through another material. * It is often quantified and measured (e.g., high permeability, low permeability). * It is commonly used with prepositions like of (the permeability of the rock) and to (permeability to water).
General/Scientific Context:
- The permeability of the soil determines how quickly rainwater will drain.
- This membrane has a high permeability to oxygen molecules.
- Engineers tested the permeability of the concrete to prevent water damage.
Geological Context:
- Sandstone typically has greater permeability than shale, allowing oil and gas to flow more easily.
- The aquifer's permeability is crucial for calculating sustainable water extraction rates.
Physics/Electromagnetism Context:
- Magnetic permeability is a measure of a material's ability to support the formation of a magnetic field within itself.
- Absolute Permeability: A measure of the permeability of a porous material when it is 100% saturated with a single fluid.
- Relative Permeability: In multiphase flow (e.g., oil, water, and gas in a reservoir), this describes the effective permeability of one phase relative to others.
- Intrinsic Permeability: A property of the porous medium itself, independent of the fluid properties.
- Permeable (adjective): Allowing liquids or gases to pass through.
- Example: A permeable membrane is used for filtration.
- Permeate (verb): To spread or flow throughout; to pass through every part of.
- Example: The smell of coffee permeated the entire house.
- Impermeability (noun): The quality of not allowing fluids to pass through; the opposite of permeability.
- Semi-permeable (adjective): Allowing only certain substances to pass through (often used in biology for cell membranes).
- Porosity (note: porosity refers to the of empty space, while permeability refers to the of those spaces allowing flow).
- Penetrability.
- Perviousness.
- Impermeability.
- Imperviousness.
- Resistance (to flow).
- Hydraulic conductivity: A related property in groundwater hydrology that combines permeability with fluid properties.
- Darcy's law: The fundamental equation describing the flow of a fluid through a porous medium, which depends directly on permeability.
- Selective permeability: A key characteristic of biological cell membranes.
- the property of something that can be pervaded by a liquid (as by osmosis or diffusion)