@prefix isq: <https://w3id.org/standards/isq/ontologies/core/> .
@prefix smart: <https://example.org/smart-sdu/> .
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix dcterms: <http://purl.org/dc/terms/> .
@prefix skos: <http://www.w3.org/2004/02/skos/core#> .

<isq:t11-4.23>
  a isq:Entry ;
  rdf:type isq:Quantity ;
  rdf:type smart:TermEntry ;
  dcterms:identifier "11-4.23" ;
  skosxl:prefLabel "Darcy friction factor"@en ;
  skosxl:altLabel "Moody friction factor"@en ;
  skosxl:altLabel "f_\"D\""@en ;
  skos:definition "representation of pressure loss in a pipe due to friction within a laminar or turbulent flow of a fluid in a pipe, expressed by\n\nstem:[f_\"D\" = (2 Delta p)/(rho v^2) d/l]; where\n\nstem:[Delta p]:: is drop of pressure (<<iso80000-4>>) due to friction,\nstem:[rho]:: is mass density (<<iso80000-4>>) of the fluid,\nstem:[v]:: is (average) speed (<<iso80000-3>>) of the fluid in the pipe,\nstem:[d]:: is diameter (<<iso80000-3>>) of the pipe, and\nstem:[l]:: is length (<<iso80000-3>>) of the pipe\n"@en ;
  smart:hasBindingnessType "bindingness-type:normative" ;
  dcterms:isPartOf <isq:part-11> ;
  iso:urn <urn:iso:std:iso:80000:-11:ed-2:en:item:11-4.23> .