[Dottorcomp] Fwd: Seminario del Prof. Carlomassimo Casciola - Prego inviare ai colleghi della Facoltà di Ingegneria

[Alessandro Reali]

Carissime e Carissimi,

vi giro l'annuncio di seminario sotto, perché forse può interessare qualcuno di voi.
Grazie per l’attenzione.

Buona giornata e cari saluti,

Ale

> Begin forwarded message:
> 
> From: Marco Marengo <marco.marengo a unipv.it>
> Subject: Seminario del Prof. Carlomassimo Casciola - Prego inviare ai colleghi della Facoltà di Ingegneria
> Date: 16 September 2024 at 15:18:13 CEST
> To: Stefania Rustioni <stefania.rustioni a unipv.it>
> Cc: Alessandro Reali <alessandro.reali a unipv.it>
> 
> SEMINARIO IN FISICA STATISTICA, TRASPORTO DI CALORE, SISTEMI MULTIFASE E FLUIDODINAMICA COMPUTAZIONALE
> 
> Venerdì 20 Settembre ore 11
> AULA RICCIARDI - DIPARTIMENTO DICAR
> 
> Nucleation processes in fluids: cavitation, boiling, condensation, and coupling with the macroscale
> 
> Prof. Carlomassimo Casciola, ERC ADVANCED
> Università La Sapienza
> 
> Nucleation of a second phase in a mother fluid is a ubiquitous phenomenon whose prediction proved a formidable task, particularly in the case of water. Phase transformations are part of our everyday experience, when boiling water to prepare tea or coffee, or for windows to fog up on cold and humid days. They are very complex processes that originate at the molecular scale, where the incessant thermal agitation produces density fluctuations [1]. The computations are based on a Ginzburg-Landau model which, as only inputs, requires a reliable equation of state for the bulk free energy and the interfacial tension of the water-vapor system. Rare event techniques borrowed from statistical mechanics allow the determination of the free-energy barrier and the nucleation rate. By consistently including thermal fluctuations [2] in the spirit of Fluctuating Hydrodynamics, the approach is extended to dynamic conditions in the presence of solid walls of different wettability [3] to allow coupling with fluid motion [4]. The talk will discuss a wide range of phenomenologies, such as homogeneous and heterogeneous cavitation, nucleate boiling [5], dropwise condensation, coupling with fluid flow, see figure,, and a few exemplary applications highlighting collective effects that may arise from the interaction of the nucleated phase with the mother fluid.
> 

> 
> References:
> [1] F. Magaletti, M. Gallo, C.M. Casciola, Water cavitation from ambient to high temperatures, Scie. Rep. 2021, 11 1.
> [2] M. Gallo, F. Magaletti, C.M. Casciola, Thermally activated vapor bubble nucleation: the Landau-Lifshitz/Van der
> Waals approach, Phys. Rev. Fluids. 2018, 3, 053604.
> [3] M. Gallo, F. Magaletti, C.M. Casciola, Heterogeneous bubble nucleation dynamics, J. Fluid Mech. 2021,
> 906 10.
> [4] M. Gallo, F. Magaletti, D. Cocco, C.M. Casciola, Nucleation and growth dynamics of vapor bubbles, J. of
> Fluid Mech. 2020, 883.
> [5] M. Gallo, F. Magaletti, A. Georgoulas, M. Marengo, J. De Coninck, C.M. Casciola, A nanoscale view of the
> origin of boiling and its dynamics. Nat. Comm. 2023, 14.1: 6428.
> _________________________________________________
> 
> Marco Marengo, PhD, MSc
> _________________________________________________
> 
> Professor of Thermal Sciences
> Department of Civil Engineering and Architecture
> University of Pavia
> 
> Address:		
> via Ferrata 3, 27100, Pavia, ITALY
> E-mail: marco.marengo a unipv.it
> Phone: +39 0382 985303
> Mobile: + 39 3467427787
> 
> https://web-en.unipv.it/20983-2/
> 
> https://www.youtube.com/watch?v=0n-rRMMbFNk
>            
> How to reach my office: DICAR, first entrance at the right of the "via Ferrata 3" gate, first floor, after the stairs, turn right: I am on the left before the Dept. admin area.
> 

> 


_________________________________________________

Alessandro Reali, PhD, MSc
_________________________________________________

Professor of Solid and Structural Mechanics
Dean of the Department of Civil Engineering and Architecture
Rector’s Delegate for International Research
University of Pavia

Address:		via Ferrata 3, 27100, Pavia, ITALY
E-mail:		alessandro.reali a unipv.it
Phone:		(+39) 0382 985704
Web:		http://www.unipv.it/alereali