exported
necessary
hydrocyclone
IRI:
http://www.inf.ufrgs.br/ontologies/copi#Hydrocyclone
Generated on 2026-04-15
Natural Language Definition
EN
A hydrocyclone is a separator that separates fluid mixtures using centrifugal forces generated by tangential flow through a conical chamber.
PT-BR
Um hidrociclone é um separador que separa misturas de fluidos usando forças centrífugas geradas por fluxo tangencial através de uma câmara cônica.
Formal Axioms
Semi-formal (Aristotelian)
Every hydrocyclone is a separator that has a conical section as component part at all times and participates in centrifugal separation processes.
First-Order Logic Theory
Loading…
▸ Stored override
∀x(Hydrocyclone(x) ↔ Separator(x) ∧ ∃c(ConicalSection(c) ∧ hasComponentPartAtAllTimes(x,c)) ∧ ∃p(CentrifugalSeparationProcess(p) ∧ participatesIn(x,p)))
OWL 2 / Turtle
@prefix copi: <https://www.inf.ufrgs.br/ontologies/copi/> .
@prefix : <https://www.inf.ufrgs.br/ontologies/copi/> .
@prefix owl: <http://www.w3.org/2002/07/owl#> .
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .
@prefix bfo: <http://purl.obolibrary.org/obo/> .
@prefix iof-core: <https://spec.industrialontologies.org/ontology/construct/> .
@prefix iof-av: <https://spec.industrialontologies.org/ontology/annotation/> .
@prefix skos: <http://www.w3.org/2004/02/skos/core#> .
@prefix qudt: <http://qudt.org/schema/qudt/> .
@prefix dcterms: <http://purl.org/dc/terms/> .
@prefix foaf: <http://xmlns.com/foaf/0.1/> .
@prefix apv: <http://inf.ufrgs.br/ontologies/apv#> .
### COPI — Core Ontology for Petroleum Installations
### Class module: Hydrocyclone
<https://www.inf.ufrgs.br/ontologies/copi>
rdf:type owl:Ontology ;
dcterms:title "Core Ontology for Petroleum Installations (COPI)"@en ;
dcterms:title "Ontologia Core para Instalações de Petróleo (COPI)"@pt-br ;
dcterms:description "BFO/IOF-Core conformant ontology of equipment classes for petroleum production plants, developed using the five-step RDL enrichment method."@en ;
skos:scopeNote "Material artifacts (bfo:material_entity) that (i) are part of a petroleum production plant, and (ii) bear at least one function whose realization involves the transport (e.g. production and injection), processing (separation and other processes), control, monitoring, measurement, containment or offloading of material or energy."@en ;
skos:scopeNote "Artefatos materiais (bfo:material_entity) que (i) fazem parte de uma planta de produção de petróleo, e (ii) possuem ao menos uma função cuja realização envolve o transporte (p. ex. produção e injeção), processamento (separação e outros processos), controle, monitoramento, medição, contenção ou escoamento de material ou energia."@pt-br ;
skos:scopeNote "COPI provides high-level equipment categories defined by function to demonstrate the defined-class mechanism. Equipment subtypes are annotated with references to CFIHOS and PCA RDL terms. COPI is not a reference data library; organizations should use CFIHOS, PCA RDL, or ISO 14224 for comprehensive equipment classification."@en ;
skos:scopeNote "COPI fornece categorias de alto nível de equipamentos definidas por função para demonstrar o mecanismo de classe definida. Os subtipos de equipamentos são anotados com referências aos termos do CFIHOS e do PCA RDL. COPI não é uma biblioteca de dados de referência; organizações devem utilizar o CFIHOS, o PCA RDL ou a ISO 14224 para classificação abrangente de equipamentos."@pt-br ;
owl:versionInfo "1.1.0" ;
owl:imports <https://spec.industrialontologies.org/ontology/core/Core/> ;
owl:imports <http://purl.obolibrary.org/obo/bfo/2020/bfo.owl> ;
dcterms:creator "Nicolau Oyhenard dos Santos"@en ;
dcterms:contributor "Cauã Antunes" ;
dcterms:contributor "Haroldo Rojas" ;
dcterms:contributor "Rafael Petry" ;
dcterms:contributor "Régis Romeu" ;
dcterms:contributor "Mara Abel" ;
dcterms:isPartOf <https://inf.ufrgs.br/projetos/OntoKG> ;
dcterms:publisher "Universidade Federal do Rio Grande do Sul (UFRGS)"@en ;
dcterms:license <https://creativecommons.org/licenses/by/4.0/> ;
dcterms:created "2026-04-08"^^xsd:date ;
dcterms:modified "2026-10-08"^^xsd:date ;
apv:GlobalMinLanguageCoverage "en pt-br" ;
apv:ClassURIFormationRule "https://www[.]inf[.]ufrgs[.]br/ontologies/copi/(COPI_[0-9]{7}|[A-Z][A-Za-z0-9]*)" ;
apv:ClassMinAnnotationCoverage "rdfs:label https://spec.industrialontologies.org/ontology/annotation/naturalLanguageDefinition" .
iof-av:naturalLanguageDefinition rdf:type owl:AnnotationProperty ;
apv:MinAnnotationLength 20 .
### Identity-giving function
:COPI_0000195 rdf:type owl:Class ; # SeparationFunction
rdfs:subClassOf iof-core:DesignedFunction ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty bfo:BFO_0000054 ; # realizedIn
owl:allValuesFrom :COPI_0000635 # SeparationProcess
] ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty bfo:BFO_0000054 ; # realizedIn
owl:someValuesFrom :COPI_0000635 # SeparationProcess
] ;
rdfs:label "separation function"@en ;
rdfs:label "função de separação"@pt-br .
### Process type
:COPI_0000635 rdf:type owl:Class ; # SeparationProcess
rdfs:subClassOf :COPI_0000006 ; # MechanicalSeparation
rdfs:label "separation process"@en ;
rdfs:label "processo de separação"@pt-br .
:COPI_0000006 rdf:type owl:Class . # MechanicalSeparation
:COPI_0000635 # SeparationProcess
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty iof-core:hasInput ;
owl:someValuesFrom :COPI_0000044 # FluidMixture
] ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty iof-core:hasSpecifiedOutput ;
owl:someValuesFrom :COPI_0000037 # PortionOfFluid
] ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty iof-core:hasSpecifiedOutput ;
owl:someValuesFrom :COPI_0000037 # PortionOfFluid
] .
### Equipment universal: Hydrocyclone
:COPI_0000301 rdf:type owl:Class ; # Hydrocyclone
rdfs:subClassOf :COPI_0000084 ; # Separator
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty iof-core:hasFunction ; # Object branch (MaterialArtifact/Assembly/Object/FiatObjectPart)
owl:someValuesFrom :COPI_0000195 # SeparationFunction
] ;
rdfs:label "hydrocyclone"@en ;
rdfs:label "hidrociclone"@pt-br ;
iof-av:naturalLanguageDefinition "A hydrocyclone is a separator that separates fluid mixtures using centrifugal forces generated by tangential flow through a conical chamber."@en ;
skos:definition "A hydrocyclone is a separator that separates fluid mixtures using centrifugal forces generated by tangential flow through a conical chamber."@en ;
iof-av:naturalLanguageDefinition "Um hidrociclone é um separador que separa misturas de fluidos usando forças centrífugas geradas por fluxo tangencial através de uma câmara cônica."@pt-br ;
iof-av:semiFormalNaturalLanguageAxiom "Every hydrocyclone is a separator that has a conical section as component part at all times and participates in centrifugal separation processes."@en ;
iof-av:firstOrderLogicAxiom "∀x(Hydrocyclone(x) ↔ Separator(x) ∧ ∃c(ConicalSection(c) ∧ hasComponentPartAtAllTimes(x,c)) ∧ ∃p(CentrifugalSeparationProcess(p) ∧ participatesIn(x,p)))"@en ;
iof-av:isPrimitive "true"^^xsd:boolean ;
skos:definition "[ISO 15926-4] A <HYDROCYCLONE> is a <CYCLONE> and a <CYLINDRICAL VESSEL>, intended to separate a fluid by hydraulic forces"@en ;
skos:definition "[SLB Glossary] An item of solids-control equipment consisting of an inverted cone, the mud being fed tangentially into the upper (larger diameter) part."@en ;
skos:definition "[OnePetro] A cone shaped device for separating fluids and the solids dispersed in fluids."@en .
# Disjointness: Hydrocyclone and Centrifuge
[] rdf:type owl:AllDisjointClasses ;
owl:members ( :COPI_0000301 :COPI_0000225 ) . # Hydrocyclone, Centrifuge
Axiomatization Decision Log
1
Identity-Giving Function
Function class
SeparationFunction
⊑ DesignedFunction
Realized in
SeparationProcess
⊑ MechanicalSeparation
All definitions emphasize separation as the identity-giving function - separating fluids, solids dispersed in fluids, or two fluids of different density. This aligns with the already-enriched SeparationFunction used by centrifuge, separator, scrubber, and filter.
2
Genus Determination
Separator
Separator is already enriched in the ontology with SeparationFunction and Vessel genus. Hydrocyclone is a specific type of separator that uses centrifugal/hydraulic forces. The parent candidates CYCLONE and CYLINDRICAL VESSEL are too broad - cyclone encompasses atmospheric phenomena, and cylindrical vessel is purely geometric. Separator captures the functional essence while being the most specific appropriate superclass.
3
Necessary Parts
No necessary parts recorded (concept may be primitive at this level).
These four components are universally required for hydrocyclone operation: the cone creates the separation chamber, tangential inlet generates vortex, and dual outlets allow separation of phases by density.
4
Process Participation Signature ⟨I, O, T⟩
Inputs (I)
FluidMixture
— contains dispersed solids or immiscible fluids
Outputs (O)
PortionOfFluid
— overflow - lighter phase or clarified fluid
PortionOfFluid
— underflow - heavier phase or concentrated solids
Transformation (T)
density-based separation using centrifugal force
Hydrocyclones take a mixed fluid stream and separate it into two streams based on density differences using centrifugal force generated by tangential flow through conical geometry.
5
Axiom Mode Decision
Necessary conditions only
— modelled as a primitive universal
(⊑, SubClassOf). Identity is grounded in designed
function and cannot be reduced to a property checklist.
Disjointness Axioms
Centrifuge
C1: Centrifuge. Centrifuges use rotating mechanical parts while hydrocyclones are stationary devices - these represent incompatible separation mechanisms
Cross-Standard Observations
ISO 15926 provides the most complete definition mentioning both the cyclone and cylindrical vessel inheritance. SLB focuses on the solids control application and inverted cone geometry. OnePetro gives the most general definition covering both fluid-fluid and fluid-solid separation.
