Artículos de revistas
Non-newtonian flow and pressure drop of pineapple juice in a plate heat exchanger
Date
2010Registration in:
Brazilian Journal of Chemical Engineering, v.27, n.4, p.563-571, 2010
0104-6632
10.1590/S0104-66322010000400008
Author
CABRAL, R. A. F.
GUT, J. A. W.
TELIS, V. R. N.
TELIS-ROMERO, J.
Institutions
Abstract
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 50º chevron plates. Density and flow properties of pineapple juice were determined and correlated with temperature (17.4 < T < 85.8ºC) and soluble solids content (11.0 < Xs < 52.4 ºBrix). 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.