Impact of composition and aeration on the migration of TAGs in sandwich type confectionery products.

A sandwich type confectionery product is made with a soft filling and a chocolate coating. The fats used for these two parts are generally different to provide specific organoleptic sensations. Thus, their compositions, in terms of the triacylglycerols (TAGs) profile, are different.

Influence of the potential well on the breakage rate of colloidal aggregates in simple shear and uniaxial extensional flows.

In this work we build on our previous paper (Harshe, Y. M.; Lattuada, M.

Breakage rate of colloidal aggregates in shear flow through stokesian dynamics.

We study the first breakage event of colloidal aggregates exposed to shear flow by detailed numerical analysis of the process. We have formulated a model, which uses stokesian dynamics to estimate the hydrodynamic interactions among the particles in a cluster, van der Waals interactions and Born repulsion to describe the normal interparticle interactions, and the tangential interactions through discrete element method to account for contact forces. Fractal clusters composed of monodisperse spherical particles were generated using different Monte Carlo methods, covering a wide range of cluster masses (N(sphere) = 30-215) and fractal dimensions (d(f) = 1.

Viscosity contribution of an arbitrary shape rigid aggregate to a dilute suspension.

The study of rheological response of solid suspensions is essential in understanding the relationships governing their kinematics and dynamics. However the study is complicated mainly by the complex interplay between suspension rheology and hydrodynamic behavior of the suspended solids, which for most of the practically occurring situations have complex and arbitrary shapes, and exact equations accounting for their hydrodynamic contribution are not available. For this reason, using a recently developed methodology capable of computing the average rigid body resistance matrix of arbitrary shaped clusters made of uniform sized spheres, Brownian dynamic simulations under shear conditions are performed for clusters with different geometries with the objective of estimating their intrinsic viscosity.

Experimental and modeling study of breakage and restructuring of open and dense colloidal aggregates.

In this work we present experimental and simulation analysis of the breakage and restructuring of colloidal aggregates in dilute conditions under shear. In order to cover a broad range of hydrodynamic and interparticle forces, aggregates composed of primary particles with two sizes, d(p) = 90 and 810 nm, were generated. Moreover, to understand the dependence of breakage and restructuring on the cluster structure, aggregates grown under stagnant and turbulent conditions, having substantially different initial internal structures with fractal dimension d(f) equal to 1.

Hydrodynamic properties of rigid fractal aggregates of arbitrary morphology.

The hydrodynamic properties of rigid fractal aggregates are key ingredients in understanding the governing mechanism of their motion and the properties of their suspensions. In the present work we outline explicit equations for the estimation of the complete set of hydrodynamic properties of arbitrary shaped aggregates made of uniform sized spherical primary particles. The rigid body motion equations are coupled to Stokesian dynamics model to derive hydrodynamic rigid body properties.