Viscosidade de polpa de cupuaçu sob aquecimento.

Abstract

The rheological behaviour of cupuaçu pulp at 12o brix in the temperatures of 30, 45 and 50oC were studied. The pulps were separate from the seeds and homogenized. To proceed, they were frozen and stored to -22ºC, being maintained like this until the collection data. The obtaining of the reometric data was accomplished using a Brookfield viscometer, model RVT. The Power Law, Herschel-Bulkley and Mizrahi-Berk models were used to fit the experimental data. The cupuaçu pulps presented pseudoplastic behaviour and the viscosity was reduced for the effect of the heating. The Herschel-Bulkley model represented better the rheological behaviour of the samples.