Modelling the thermal sterilisation of foods inside packs with two divisions
Autor(a) principal: | |
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Data de Publicação: | 1996 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10400.14/6588 |
Resumo: | A mathematical model was developed to describe the heat transfer during the sterilisation of conduction heating foods inside three dimensional two division rectangular packs. The model uses a standard explicit finite differences method with non-capacitance surface nodes and simulates different pack sizes, food properties and surface heat transfer resistances at the package lid and walls. Taking into account the cooling phase, the sterility value was calculated as a function of position in order to identify the location of the least lethality point. The most important variables affecting the position of this point are the product heating rate and the surface heat transfer coefficients. For low heating rate values this critical point moves towards the surface. When different food products are sterilised in simultaneously the quality degradation of foods in this type of package is also a point of discussion. |
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Modelling the thermal sterilisation of foods inside packs with two divisionsA mathematical model was developed to describe the heat transfer during the sterilisation of conduction heating foods inside three dimensional two division rectangular packs. The model uses a standard explicit finite differences method with non-capacitance surface nodes and simulates different pack sizes, food properties and surface heat transfer resistances at the package lid and walls. Taking into account the cooling phase, the sterility value was calculated as a function of position in order to identify the location of the least lethality point. The most important variables affecting the position of this point are the product heating rate and the surface heat transfer coefficients. For low heating rate values this critical point moves towards the surface. When different food products are sterilised in simultaneously the quality degradation of foods in this type of package is also a point of discussion.ElsevierVeritati - Repositório Institucional da Universidade Católica PortuguesaÁvila, Isabel M. L. B.Manso, Maria da ConceiçãoSilva, Cristina L. M.2011-10-21T09:05:45Z19961996-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.14/6588engÁVILA, Isabel M. L. B. ; MANSO, Maria da Conceição ; SILVA, Cristina L. M. - Modelling the thermal sterilisation of foods inside packs with two divisions. Mathematics and Computers in Simulation. ISSN 0378-4754. 42:2-3 (1996). 279-285info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-07-12T17:11:00Zoai:repositorio.ucp.pt:10400.14/6588Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T18:06:07.164274Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Modelling the thermal sterilisation of foods inside packs with two divisions |
title |
Modelling the thermal sterilisation of foods inside packs with two divisions |
spellingShingle |
Modelling the thermal sterilisation of foods inside packs with two divisions Ávila, Isabel M. L. B. |
title_short |
Modelling the thermal sterilisation of foods inside packs with two divisions |
title_full |
Modelling the thermal sterilisation of foods inside packs with two divisions |
title_fullStr |
Modelling the thermal sterilisation of foods inside packs with two divisions |
title_full_unstemmed |
Modelling the thermal sterilisation of foods inside packs with two divisions |
title_sort |
Modelling the thermal sterilisation of foods inside packs with two divisions |
author |
Ávila, Isabel M. L. B. |
author_facet |
Ávila, Isabel M. L. B. Manso, Maria da Conceição Silva, Cristina L. M. |
author_role |
author |
author2 |
Manso, Maria da Conceição Silva, Cristina L. M. |
author2_role |
author author |
dc.contributor.none.fl_str_mv |
Veritati - Repositório Institucional da Universidade Católica Portuguesa |
dc.contributor.author.fl_str_mv |
Ávila, Isabel M. L. B. Manso, Maria da Conceição Silva, Cristina L. M. |
description |
A mathematical model was developed to describe the heat transfer during the sterilisation of conduction heating foods inside three dimensional two division rectangular packs. The model uses a standard explicit finite differences method with non-capacitance surface nodes and simulates different pack sizes, food properties and surface heat transfer resistances at the package lid and walls. Taking into account the cooling phase, the sterility value was calculated as a function of position in order to identify the location of the least lethality point. The most important variables affecting the position of this point are the product heating rate and the surface heat transfer coefficients. For low heating rate values this critical point moves towards the surface. When different food products are sterilised in simultaneously the quality degradation of foods in this type of package is also a point of discussion. |
publishDate |
1996 |
dc.date.none.fl_str_mv |
1996 1996-01-01T00:00:00Z 2011-10-21T09:05:45Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10400.14/6588 |
url |
http://hdl.handle.net/10400.14/6588 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
ÁVILA, Isabel M. L. B. ; MANSO, Maria da Conceição ; SILVA, Cristina L. M. - Modelling the thermal sterilisation of foods inside packs with two divisions. Mathematics and Computers in Simulation. ISSN 0378-4754. 42:2-3 (1996). 279-285 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Elsevier |
publisher.none.fl_str_mv |
Elsevier |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
instname_str |
Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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1799131727234334720 |