@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:t11-4.26>
  a isq:Entry ;
  rdf:type isq:Quantity ;
  rdf:type smart:TermEntry ;
  dcterms:identifier "11-4.26" ;
  skosxl:prefLabel "Hagen number"@en ;
  skosxl:altLabel "Hg"@en ;
  skosxl:altLabel "Ha"@en ;
  skos:definition "generalization of the Grashof number for forced or free convection in laminar flow, expressed by\n\nstem:[Hg = -1/rho (\"d\"p)/(\"d\"x) l^3/v^2]; where\n\nstem:[rho]:: is mass density (<<iso80000-4>>) of fluid,\nstem:[(\"d\"p)/(\"d\"x)]:: is gradient of pressure (<<iso80000-4>>),\nstem:[l]:: is characteristic length (<<iso80000-3>>), and\nstem:[sf(ii(v))]:: is kinematic viscosity (<<iso80000-4>>)\n"@en ;
  smart:hasBindingnessType "bindingness-type:normative" ;
  dcterms:isPartOf <isq:part-11> ;
  skos:note "For free thermal convection with stem:[(\"d\"p)/(\"d\"x) = rho g alpha_\"V\" Delta T], the Hagen number then coincides with the Grashof number (<<t11-4.4>>). See also the Poiseuille number (<<t11-4.28>>)."@en ;
  iso:urn <urn:iso:std:iso:80000:-11:ed-2:en:item:11-4.26> .