Gianpietro Cossali
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View article: A new model of bi-component droplet heating and evaporation
A new model of bi-component droplet heating and evaporation Open
A new model of bi-component droplet heating and evaporation is described. The model considers the effects of temperature gradient and component diffusion in the liquid and gas phases, assuming that all processes are spherically symmetric. …
View article: Sessile and suspended droplets on a biphilic surface in the presence of natural convection: Experimental studies and modeling
Sessile and suspended droplets on a biphilic surface in the presence of natural convection: Experimental studies and modeling Open
New experimental and modeling results, referring to heating and evaporation of sessile and pendant water droplet on a biphilic surface, are presented. Two modeling approaches are used: one based on the previously developed variable density…
View article: Evaporation of arrays of single-component drops on hydrophobic and hydrophilic surfaces
Evaporation of arrays of single-component drops on hydrophobic and hydrophilic surfaces Open
The paper focuses on modelling the evaporation of arrays of single-component identical sessile droplets, a phenomenon encountered in various applications. An analytical approach is used and developed to treat ordered and scattered sessile …
View article: Wetting behavior in the inertial phase of droplet impacts onto sub-millimeter microstructured surfaces
Wetting behavior in the inertial phase of droplet impacts onto sub-millimeter microstructured surfaces Open
Diamond-shaped spreading patterns with edges aligned at 45∘ to the structure pattern are observed. A transition between top-dominated (circular) spreading and diamond spreading occurs depending on the structure size and impact velocity. Gr…
View article: A novel methodology for the diffusion coefficient determination in porous media by X-ray high-resolution radiographies
A novel methodology for the diffusion coefficient determination in porous media by X-ray high-resolution radiographies Open
The first step in diagnosing a patient with cancer is the biopsy and the study of the tissue sample taken, suitably processed, is essential for a correct diagnosis. Tissue processors are machines that automatically perform the entire proce…
View article: Modeling the effect of shape deformation induced by gravity on the evaporation of pendant and sessile drops
Modeling the effect of shape deformation induced by gravity on the evaporation of pendant and sessile drops Open
Pendant and sessile drops form a spherical cap only in the absence of gravity. The effect of gravity on drop shape is often neglected on the basis of the assumption that the drop size is smaller than the capillary length [Lc=(σ/gρ)1/2], al…
View article: Gravity induced shape effects on the time-dependent evaporation of pendant drops
Gravity induced shape effects on the time-dependent evaporation of pendant drops Open
The paper presents a method to model the time-dependent evaporation of pendant drops taking into account the effect of drop deformation induced by gravity. The model is based on the solution to the time-dependent drop mass and energy conse…
View article: Droplet heating and evaporation: A new approach to the modeling of the processes
Droplet heating and evaporation: A new approach to the modeling of the processes Open
A new model for mono-component droplet heating/evaporation is developed, tested, and applied to the analysis of in-house experimental data. The new model links the previously developed liquid phase model, using the analytical solution to t…
View article: Modeling the evaporation of sessile drops deformed by gravity on hydrophilic and hydrophobic substrates
Modeling the evaporation of sessile drops deformed by gravity on hydrophilic and hydrophobic substrates Open
Evaporation of sessile drops deformed by gravity is quantified by an analytical–numerical approach. The shape of the drops is defined by minimizing the interfacial and potential drop energies, following a variational integral approach, for…
View article: A model of droplet evaporation: New mathematical developments
A model of droplet evaporation: New mathematical developments Open
A previously developed model for mono-component droplet evaporation is revisited using new mathematical tools for its analysis. The analysis is based on steady-state mass, momentum, and energy balance equations for the vapor and air mixtur…
View article: "Droplet Interaction Technologies" (DROPIT): Selected Results of the International Research Training Group GRK 2160
"Droplet Interaction Technologies" (DROPIT): Selected Results of the International Research Training Group GRK 2160 Open
The International Research Training Group GRK 2160 (DROPIT), active since Oct. 2016, focuses on droplet interaction technologies, which have a large number of applications in a variety of technological processes.The main objective of DROPI…
View article: Mathematical modelling of heating and evaporation of a spheroidal droplet
Mathematical modelling of heating and evaporation of a spheroidal droplet Open
Most of the currently used models for droplet heating and evaporation are based on the assumption that droplets are perfect spheres. At the same time the shapes of many observed droplets in engineering applications are far from spherical. …
View article: Effect of temperature dependence of gas thermo-physical properties on analytical modelling of drop heating and evaporation
Effect of temperature dependence of gas thermo-physical properties on analytical modelling of drop heating and evaporation Open
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View article: Analytical modelling of heating and evaporation of drop clouds with temperature dependent gas properties
Analytical modelling of heating and evaporation of drop clouds with temperature dependent gas properties Open
An analytical approach to evaluate the effects of droplet neighbouring on heating and evaporation is proposed, solving the conservation equations through the point source method, accounting for the dependence on temperature and composition…
View article: Proceedings of the DIPSI Workshop 2019: Droplet Impact Phenomena & Spray Investigations, Bergamo, Italy, 17th May 2019
Proceedings of the DIPSI Workshop 2019: Droplet Impact Phenomena & Spray Investigations, Bergamo, Italy, 17th May 2019 Open
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View article: Modelling of spheroidal drop evaporation with non-uniform temperature conditions
Modelling of spheroidal drop evaporation with non-uniform temperature conditions Open
The heating and evaporation of single component spherical and spheroidal drops in gaseous quiescentenvironment are predicted, accounting for the effect of a non-uniform distribution of the temperature at the drop surface. The analytical so…
View article: Numerical Simulations of Internal Flow in an Aircraft Engine Pressure Swirl Atomizer
Numerical Simulations of Internal Flow in an Aircraft Engine Pressure Swirl Atomizer Open
The internal flow and the liquid structure at the nozzle exit are investigated in a typical pressure swirl atomizer for aeroengine applications under an isothermal nonreacting environment using a two-phase flow modeling according to the vo…
View article: Comparison between molar- and mass-based approaches to drop evaporation modelling
Comparison between molar- and mass-based approaches to drop evaporation modelling Open
Papers presented to the 12th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, Costa de Sol, Spain on 11-13 July 2016.