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|Type:||Artigo de periódico|
|Title:||Rheological properties of noncohesive apple dispersion with helical and vane impellers: Effect of concentration and particle size|
|Abstract:||The proportionality constant, k(s), between shear rate, (gamma) over dot, and agitation velocity, N, for a helical ribbon-screw (HRS) agitator was 17.8. Using the HRS agitator, values of consistency index K and the flow behavior index n of 14 apple pulp suspensions at seven different solids concentrations and two average particle diameters 0.71 mm and 1.21 mm were determined; in addition, values of the Casson viscosity eta (c), and yield stress sigma (0C), were also calculated. The magnitudes of K increased and of n decreased with increase in pulp concentration. Experimental values of the vane yield stress, sigma (0v), measured with a six-blade vane increased with increase in pulp content. The values of a, obtained using the Casson model were close to the experimental values sigma (0v). The effect of particle size on the relative viscosity, eta (r), was correlated with Peclet number.|
|Editor:||Food Nutrition Press Inc|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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