Marco Vanni

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The first stress-strain measurements on embryonic cardiovascular tissue are described here, obtained from cyclic uniaxial loading of the primitive ventricle. An excised ventricular segment from Hamburger/Hamilton stage-16 or stage-18 chicks (2-1/2 and 3 days of a 21-day incubation period) was mounted longitudinally between two small wires in oxygenated(More)
The mechanical properties of embryonic cardiac tissue, an important link between form and function, are largely unknown. This study provides new information on the viscoelastic behavior of the stage-16 and stage-18 (21/2 and 3 d) chick ventricle. The cylindrical ventricles were removed from the embryo, arrested in diastole, and mounted between two small(More)
The distribution of stresses in rigid colloidal aggregates under a shear flow was investigated numerically for particle-cluster and cluster-cluster aggregates with fractal dimensions ranging from 1.7 to 2.3. stokesian dynamics was used to calculate the hydrodynamic force on each monomer, while the internal intermonomer interactions were calculated by(More)
The distribution of stresses in rigid fractal-like aggregates moving in a uniform flow field was investigated for particle-cluster and cluster-cluster aggregates with fractal dimensions ranging from 1.7 to 2.3. The method of reflections was used to calculate the drag force on each monomer, while the internal inter-monomer interactions were calculated by(More)
The mechanism of shear-induced coagulation of colloidal particles is reviewed, in order to define a method to evaluate the collision efficiency according to the present knowledge of the phenomenon. Therefore, a detailed description of the procedure for trajectory analysis and identification of collision is presented, as well as of the role and estimation of(More)
The method of moment (MOM) is a powerful tool for solving population balance. Nevertheless it cannot be used in every circumstance. Sometimes, in fact, it is not possible to write the governing equations in closed form. Higher moments, for instance, could appear in the evolution of the lower ones. This obstacle has often been resolved by prescribing some(More)
Detailed knowledge of the transport of air and particles in the human lungs is needed for two reasons: the selection of the right dosage of aerosol drugs used in respiratory therapy and the analysis of the maximum allowable concentration for particulate in air. This work is the first step of a more complex study, purpose of which is to provide some(More)
The effect of flow configuration on the distribution of internal stresses in rigid colloidal aggregates was investigated numerically for cluster-cluster aggregates with fractal dimensions ranging from 1.7 to 2.3. Stokesian dynamics was used to evaluate the hydrodynamic force on each monomer, while the internal intermonomer interactions were calculated by(More)
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