- porosity, effective
- 1. The ratio, usually expressed as a percentage of the total volume of voids available for fluid transmission to the total volume of the porous medium .2. The ratio of the volume of the voids of a soil or rock mass that can be drained by gravity to the total volume of the mass .3. The amount of interconnected pore space and fracture openings available for the transmission of fluids, expressed as the ratio of the volume of interconnected pores and openings to the volume of rock.
A Lexicon of Cave and Karst Terminology with Special Reference to Environmental Karst Hydrology. Courtesy of the author & The Karst Waters Institute. 2002.
Look at other dictionaries:
porosity, tertiary — Porosity caused by solutional enlargement of secondary porosity. See also pore; pore space; porosity; porosity, effective; porosity, primary; porosity, secondary … Lexicon of Cave and Karst Terminology
porosity, primary — Porosity of some lithological material that developed while the rock was forming. See also interstice; pore; pore space; porosity; porosity, effective; porosity, secondary … Lexicon of Cave and Karst Terminology
porosity, secondary — Porosity of some lithologic material that has developed after the rock was initially formed, such as joints and fractures, and may be capable of enlargement by dissolution processes. See also pore; pore space; porosity, effective; porosity … Lexicon of Cave and Karst Terminology
Effective porosity — The term effective porosity lacks a single or straightforward definition. Even some of the terms used in its mathematical description (“Vcl” and “Vsh”) have multiple definitions. However, it is most commonly considered to represent the porosity… … Wikipedia
porosity — 1. The ratio of the aggregate volume of interstices in a rock or soil to its total volume; generally stated as a percentage . 2. The ratio, usually expressed as a percentage, of the total volume of voids of a given porous medium to the… … Lexicon of Cave and Karst Terminology
effective porosity — See porosity, effective … Lexicon of Cave and Karst Terminology
Porosity — or void fraction is a measure of the void (i.e., empty ) spaces in a material, and is a fraction of the volume of voids over the total volume, between 0–1, or as a percentage between 0–100%. The term is used in multiple fields including… … Wikipedia
Porosity sealing — Porosity sealing, also known as vacuum impregnating, metal impregnating, polymer impregnating, and porous metal sealing, is the process of filling a porous substrate to make it airtight. Process Porosity sealing is a four step process: Air within … Wikipedia
Formation evaluation neutron porosity — In the field of formation evaluation, porosity is one of the key measurements to quantify an oil and gas reserves. Neutron porosity measurement employs neutron source to measure hydrogen index in a reservoir, which is directly related to porosity … Wikipedia
stress, effective — Stress (pressure) that is borne by and transmitted through the grain to grain contacts of a deposit, and thus affects its porosity or void ratio and other physical properties. In onedimensional compression, effective stress is the average… … Lexicon of Cave and Karst Terminology