@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:t11-5.20>
  a isq:Entry ;
  rdf:type isq:Quantity ;
  rdf:type smart:TermEntry ;
  dcterms:identifier "11-5.20" ;
  skosxl:prefLabel "Stark number"@en ;
  skosxl:altLabel "DEPRECATED: Stefan number"@en ;
  skosxl:altLabel "DEPRECATED: Biot radiation number"@en ;
  skosxl:altLabel "Sk"@en ;
  skos:definition "relation between radiant heat and conductive heat multiplied by the relative temperature difference for a body, expressed by\n\nstem:[Sk = epsilon sigma T^3l//lambda]; where\n\nstem:[epsilon]:: is emissivity (<<iso80000-7>>) of the surface,\nstem:[sigma]:: is the Stefan-Boltzmann constant (<<iso80000-7>>),\nstem:[T]:: is thermodynamic temperature (<<iso80000-5>>),\nstem:[l]:: is characteristic length (<<iso80000-3>>), and\nstem:[lambda]:: is thermal conductivity (<<iso80000-5>>)\n"@en ;
  smart:hasBindingnessType "bindingness-type:normative" ;
  dcterms:isPartOf <isq:part-11> ;
  skos:note "The relative temperature difference is defined by stem:[(Delta T)/T]; where stem:[Delta T = T_\"s\" - T_\"l\"] is the difference of the temperature at the surface, stem:[T_\"s\"], and the temperature at a layer at a distance stem:[l] from the surface, stem:[T_\"l\"].\n\nSometimes this characteristic number is wrongly defined without the factor stem:[epsilon].\n"@en ;
  iso:urn <urn:iso:std:iso:80000:-11:ed-2:en:item:11-5.20> .