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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Two-phase flow patterns across triangular tube bundles for air-water upward flow

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Autor(es):
Kanizawa, Fabio Toshio [1] ; Ribatski, Gherhardt [1]
Número total de Autores: 2
Afiliação do(s) autor(es):
[1] Univ Sao Paulo, Sao Carlos Sch Engn, Heat Transfer Res Grp, Ave Trabalhador Sao Carlense 400, BR-13566590 Sao Paulo - Brazil
Número total de Afiliações: 1
Tipo de documento: Artigo Científico
Fonte: INTERNATIONAL JOURNAL OF MULTIPHASE FLOW; v. 80, p. 43-56, APR 2016.
Citações Web of Science: 11
Resumo

This paper presents flow pattern experimental results obtained during two-phase upward flow across a horizontal tube bundle. Experiments were performed for flows across a normal triangular tube bundle with 19 mm OD tubes and transversal pitch of 24 mm. Results were obtained for gas and liquid superficial velocities ranging from 013 to 10.00 m/s and 0.02 to 1.50 m/s, respectively. Flow patterns were identified subjectively based on visual observations through side windows, and objectively using the k-means clustering method based on signals of a differential pressure transducer and a capacitive sensor. Bubbles, large bubbles, dispersed bubbles, churn, intermittent and annular flow patterns were identified subjectively. The clustering method satisfactorily identified groups of data corresponding to the distinct flow patterns, which were compared with predictive methods available in the open literature. New predictive methods for transitions between flow patterns are proposed based on the flow patterns identified objectively. The proposed methods predicted accurately the data obtained in the present study as well as experimental results and flow pattern maps available in the open literature for distinct geometries. (C) 2015 Elsevier Ltd. All rights reserved. (AU)

Processo FAPESP: 10/20670-2 - Estudo teórico e experimental da fração de vazio e da vibração induzida pelo padrão de escoamento externamente a banco de tubos
Beneficiário:Fabio Toshio Kanizawa
Linha de fomento: Bolsas no Brasil - Doutorado
Processo FAPESP: 14/06902-9 - Estudo teórico e experimental da vibração induzida por escoamentos bifásicos externos a banco de tubos
Beneficiário:Fabio Toshio Kanizawa
Linha de fomento: Bolsas no Brasil - Pós-Doutorado
Processo FAPESP: 15/00854-5 - Caracterização de escoamento bifásico externo a banco de tubos
Beneficiário:Fabio Toshio Kanizawa
Linha de fomento: Bolsas no Exterior - Estágio de Pesquisa - Pós-Doutorado