Residence Time Distribution Models Derived from Non-Ideal Laminar Velocity Profiles in Tubes

Autor(es)

Pegoraro, Paula R. ^[1] ; Marangoni, Mariana ^[1] ; Gut, Jorge A. W. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Escola Politecn, Dept Chem Engn, BR-05424970 Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: CHEMICAL ENGINEERING & TECHNOLOGY; v. 35, n. 9, p. 1593-1603, SEP 2012.
• Citações Web of Science: 7
• Assunto(s): Mecânica dos líquidos Hidrodinâmica Fluxo laminar dos líquidos

Resumo

The theoretical E-curve for the laminar flow of non-Newtonian fluids in circular tubes may not be accurate for real tubular systems with diffusion, mechanical vibration, wall roughness, pipe fittings, curves, coils, or corrugated walls. Deviations from the idealized laminar flow reactor (LFR) cannot be well represented using the axial dispersion or the tanks-in-series models of residence time distribution (RTD). In this work, four RTD models derived from non-ideal velocity profiles in segregated tube flow are proposed. They were used to represent the RTD of three tubular systems working with Newtonian and pseudoplastic fluids. Other RTD models were considered for comparison. The proposed models provided good adjustments, and it was possible to determine the active volumes. It is expected that these models can be useful for the analysis of LFR or for the evaluation of continuous thermal processing of viscous foods. (AU)

• Processo FAPESP: 09/07934-3 - Estudo e modelagem do tratamento térmico contínuo em trocador de calor bitubular
• Beneficiário: Jorge Andrey Wilhelms Gut
• Modalidade de apoio: Auxílio à Pesquisa - Regular