NON-NEWTONIAN FLOW AND PRESSURE DROP OF PINEAPPLE JUICE IN A PLATE HEAT EXCHANGER

Autor(es)

Cabral, R. A. F. ^[1] ; Gut, J. A. W. ^[2] ; Telis, V. R. N. ^[1] ; Telis-Romero, J. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Paulista, Dept Food Engn & Technol, BR-15054000 Sao Jose Do Rio Preto, SP - Brazil

^[2] Univ Sao Paulo, Escola Politecn, Dept Chem Engn, BR-05424970 Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Brazilian Journal of Chemical Engineering; v. 27, n. 4, p. 563-571, OCT-DEC 2010.
• Citações Web of Science: 7

Resumo

The study of non-Newtonian flow in plate heat exchangers (PHEs) is of great importance for the food industry. The objective of this work was to study the pressure drop of pineapple juice in a PHE with 50 degrees chevron plates. Density and flow properties of pineapple juice were determined and correlated with temperature (17.4 <= T <= 85.8 degrees C) and soluble solids content (11.0 <= X(s) <= 52.4 degrees Brix). The Ostwald-de Waele (power law) model described well the rheological behavior. The friction factor for non-isothermal flow of pineapple juice in the PHE was obtained for diagonal and parallel/side flow. Experimental results were well correlated with the generalized Reynolds number (20 <= Re(g) <= 1230) and were compared with predictions from equations from the literature. The mean absolute error for pressure drop prediction was 4% for the diagonal plate and 10% for the parallel plate. (AU)

• Processo FAPESP: 06/56015-2 - Estudo do comportamento viscoelástico de dispersões aquosas de fibras de colágeno na presença de polissacarídeos
• Beneficiário: Vânia Regina Nicoletti Telis
• Linha de fomento: Auxílio à Pesquisa - Regular