Simulation of a single spherical droplet drying considering shrinking and temperature profiles: first drying stage

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dc.creatorDiego Henrique de Souza Chaves
dc.creatorViviane Santos Birchal
dc.creatorEsly Ferreida da Costa Junior
dc.date.accessioned2024-12-17T09:30:58Z
dc.date.accessioned2025-09-08T23:37:24Z
dc.date.available2024-12-17T09:30:58Z
dc.date.issued2023-04-14
dc.format.mimetypepdf
dc.identifier.doihttps://doi.org/10.1590/0001-3765202320220202
dc.identifier.issn1678-2690
dc.identifier.urihttps://hdl.handle.net/1843/78715
dc.languageeng
dc.publisherUniversidade Federal de Minas Gerais
dc.relation.ispartofAnais da Academia Brasileira de Ciências
dc.rightsAcesso Aberto
dc.subjectControle de umidade
dc.subjectUmidade
dc.subjectSecagem
dc.subject.otherCritical moisture
dc.subject.otherDifferential-algebraic equations
dc.subject.otherFirst drying stage
dc.subject.otherSingle droplet drying
dc.subject.otherSpray drying
dc.titleSimulation of a single spherical droplet drying considering shrinking and temperature profiles: first drying stage
dc.typeArtigo de periódico
local.citation.epage18
local.citation.issue1
local.citation.spage1
local.citation.volume95
local.description.resumoA model including simultaneous droplet heating and water evaporation is proposed to simulate temperature, shrinking and mass profiles of a spherical droplet subjected to convective drying, being valid for the first drying stage. Experimental data on drying skim milk and colloidal silica obtained in the literature were used for validation, but there is no restriction in the model that prevents it from being suitable for other materials. There were not significant differences observed concerning to the droplet components (dissolved or insoluble materials). The initial heating time of the particle upon reaching the constant temperature is relatively short (Δt ≈ 7s) for both simulated materials and water evaporation during the first drying stage occurs mostly at the wet bulb temperature of the air. Discrepancy between simulated and experimental values did not exceed 9% for skim milk and 7% for colloidal silica in this first stage, indicating good applicability of the model. Considering the applicability of the model in a more generic way, Whitaker correlation evaluated at the film temperature showed better results. Finally, the small discrepancy found is discussed and some improvements are proposed.
local.identifier.orcidhttps://orcid.org/0000-0002-4611-9256
local.identifier.orcidhttps://orcid.org/0000-0003-3356-0488
local.identifier.orcidhttps://orcid.org/0000-0002-9245-4223
local.publisher.countryBrasil
local.publisher.departmentENG - DEPARTAMENTO DE ENGENHARIA QUÍMICA
local.publisher.initialsUFMG
local.url.externahttps://www.scielo.br/j/aabc/a/3349gCRvWDVf8ZkHsySFwrn/?lang=en

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