Boetti, Marco

Boetti Marco
Host
Tel Aviv University
Country
Italy
Education

Master degree in Physics, Università di Torino, Italy.

Curriculum Vitae
Boetti CV118.66 KB
ESR7 - Lagrangian properties of aerosol parcels at the turbulent/non-turbulent interfaces with density jumps
Objectives

Experimental and numerical-based estimates of "apparent diffusivity" of particles and fluid parcels crossing the turbulent/non-turbulent interfaces with density jumps.

 

Ph.D  The Faculty of Engineering School of Mechanical Engineering, 
Title: A NUMERICAL STUDY OF STRATIFIED TURBULENT/NON-TURBULENT INTERFACES
Link: Marco Boetti 9933620693504146.pdf

 

Expected Results

Parameterisation and a model of the spreading rate and "apparent diffusivity" constants as a function of density jump, and particle-related parameters (Reynolds, Stokes).

Planned secondment(s)
  • POLITO (Torino)                                Month 12-14: studying the "apparent diffusivity" estimates from high-performance numerical simulations
  • ICL (London)                                      Month 24-26: learning the numerical simulation methods for stratified flows with high Peclet numbers
  • MPG/UFS (Goettingen/Zugspitze)     Month 30: studying applicativity of "diffusivity" parameters in wind measurement applications
Comments

After having learnt physics fundamentals during the Bachelor's degree program, I decided to attend the Master's degree program in Physics with a geophysics outline. Among the courses available in this academic program, my interest was oriented on atmosphere dynamic topics. Hence my prociency area is related mainly to atmospheric physics within the PBL: meteorological processes, turbulence and dispersion phenomena, geophysics numerical modeling.

 

Publications

Force on inertial particles crossing a two layer stratified turbulent/non-turbulent interface

Year
2022
Document type
Article
Authors
Marco Boetti, Lilly Verso
Source

Link to the paper:

 

https://www.sciencedirect.com/science/article/pii/S0301932222001410?utm_campaign=STMJ_AUTH_SERV_PUBLISHED&utm_medium=email&utm_acid=260305298&SIS_ID=&dgcid=STMJ_AUTH_SERV_PUBLISHED&CMX_ID=&utm_in=DM267652&utm_source=AC_

 

Investigation on the motion of inertial solid particles across stratified turbulent/non-turbulent interfaces (STNTI). Previous studies in quiescent stratified layers demonstrated that inertial particles slow down due to an additional force term related to the stratification.

They report for the first time a similar effect on inertial particles moving across a two-layer STNTI of finite thickness. The problem is addressed both experimentally and numerically: they utilize the three-dimensional particle tracking velocimetry (3D-PTV) in a index-matched STNTI experiment under an oscillating grid, and two direct numerical simulation (DNS) cases of STNTI. The numerical spheres are tracked using a modified Basset–Boussinesq–Oseen equation that includes the stratification force, modelled as the buoyancy of a caudal wake with varying density.

Numerical results for the STNTI cases help to distinguish the essential features observed in the experiments that are caused by stratification from those that relate to turbulence–particle interactions.

External link
https://reader.elsevier.com/reader/sd/pii/S0301932222001410?token=5674EE45C6412E8A30F47D92DEA265AFA68B839BAA844EF57DD9DE4ACB3C9D4464C9336CE40EFAA3061CB7FBD3685344&originRegion=eu-west-1&originCreation=20220621084232
Force on inertial particles crossing a two layer stratified turbulent/non-turbulent interface1.84 MB

Potential-enstrophy length scale for the turbulent/nonturbulent interface in stratified flow

Year
2022
Document type
Article
Authors
Marco Boetti, Maarten van Reeuwijk, and Alexander Liberzon
Phys. Rev. Fluids 6, 114803 – Published 15 November 2021

The paper published by Marco Boetti, Maarten van Reeuwijk, and Alexander Liberzon.

 

Aim> Turbulent/nonturbulent interfaces typically have a thickness of the order of the Kolmogorov scale. However, when we add a density or temperature stratification, we observe that the interface thickness scales differently. We analyze two different turbulent flows at moderate Reynolds numbers using direct numerical simulation and demonstrate that the results collapse on a single curve using a lengthscale based on the potential enstrophy.

 link:

 https://journals.aps.org/prfluids/abstract/10.1103/PhysRevFluids.6.114803

A paper was published about Potential-enstrophy length scale for the turbulent/nonturbulent interface in stratified flow by Marco Boetti, Maarten van Reeuwijk, and Alexander Liberzon on 15 November 2021

Year
2021
Document type
Article
Authors
Marco Boetti, Maarten van Reeuwijk, and Alexander Liberzon
External link
https://journals.aps.org/prfluids/abstract/10.1103/PhysRevFluids.6.114803