porosity

porosity
   in the paper industry, "porosity" is generally measured by the time (in seconds) required for 100 cubic centimeters of air to pass through one square inch of the paper at a standard pressure difference. Thus the porosity unit is square inch seconds per deciliter (s·in2/dl). This is sometimes called a Gurley unit after the name of a test procedure. In SI units, 1 s·in2/dl = 6.4516 seconds per meter column of air (s/m).

Dictionary of units of measurement. 2015.

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  • 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 — Po*ros i*ty, n. [Cf. F. porosit[ e].] The quality or state of being porous; opposed to density. [1913 Webster] …   The Collaborative International Dictionary of English

  • Porosity — Porosity. См. Пористость. (Источник: «Металлы и сплавы. Справочник.» Под редакцией Ю.П. Солнцева; НПО Профессионал , НПО Мир и семья ; Санкт Петербург, 2003 г.) …   Словарь металлургических терминов

  • porosity — (n.) late 14c., from M.L. porositas, from porus (see PORE (Cf. pore) (n.)) …   Etymology dictionary

  • porosity — [pō räs′ə tē, pəräs′ə tē] n. pl. porosities [ME porositee < ML porositas: see POROUS + ITY] 1. the quality or state of being porous 2. the ratio, usually expressed as a percentage, of the volume of a material s pores, as in rock, to its total… …   English World dictionary

  • porosity —    1. The ratio of the aggregate volume of interstices in a rock or soil to its total volume; generally stated as a percentage [10].    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

  • porosity — [[t]pɔːrɒ̱sɪti[/t]] N UNCOUNT Porosity is the quality of being porous. [FORMAL] ...the porosity of the coal …   English dictionary

  • porosity — akytumas statusas T sritis Standartizacija ir metrologija apibrėžtis Akytoje terpėje esančių ertmių bendrojo tūrio ir viso terpės tūrio dalmuo. priedas( ai) Grafinis formatas atitikmenys: angl. porosity vok. Porosität, f rus. пористость, f pranc …   Penkiakalbis aiškinamasis metrologijos terminų žodynas

  • porosity — akytumas statusas T sritis Standartizacija ir metrologija apibrėžtis Medžiagos savybė turėti daugybę atvirų ertmių. atitikmenys: angl. porosity vok. Porosität, f rus. пористость, f pranc. porosité, f …   Penkiakalbis aiškinamasis metrologijos terminų žodynas

  • porosity — akytumas statusas T sritis chemija apibrėžtis Medžiagos savybė turėti daug mažų ertmių. atitikmenys: angl. poriness; porosity; porousness; sponginess; voidage rus. пористость; ячеистость ryšiai: sinonimas – porėtumas sinonimas – poringumas …   Chemijos terminų aiškinamasis žodynas

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