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UID:0-1176@aerospace.technion.ac.il

DTSTART;TZID=Asia/Jerusalem:20250804T133000

DTEND;TZID=Asia/Jerusalem:20250804T143000

DTSTAMP:20250730T095354Z

URL:https://aerospace.technion.ac.il/events/multiscale-analysis-of-interfa
 ce-driven-momentum-transport-at-free-flow-and-porous-medium-boundaries/

SUMMARY:Multiscale Analysis of Interface-driven Momentum Transport at Free-
 flow and Porous Medium Boundaries
DESCRIPTION:Lecturer:Mario Del Mastro \n Faculty:The Stephen B. Klein Facul
 ty of Aerospace Engineering\n Institute:Technion – Israel Institute of T
 echnology\n Location:Classroom 165\, ground floor\, Library\, Aerospace En
 g.\n Zoom: https://technion.zoom.us/j/93549691766\n Abstract: \n\n\nThe in
 teraction between a porous medium and an adjacent free-flow is critical in
  many natural and engineered systems\, yet accurately describing interfaci
 al momentum transport remains a challenge. This study examines such couple
 d systems at the microscale\, using an integrated experimental and theoret
 ical approach. Soft-lithography-fabricated micromodels and micro-Particle 
 Image Velocimetry (µPIV) are used to characterize momentum transport acro
 ss the fluid-porous interface under isothermal\, single-phase\, laminar co
 nditions.\nThe influence of porosity on interfacial slip velocity and boun
 dary layer development is examined using ordered porous structures. An exp
 licit analytical solution for interfacial velocity distributions is derive
 d using the Brinkman model\, overcoming limitations of classical Stokes-ba
 sed models that suffer from convergence and truncation issues in high widt
 h-to-height ratio rectangular channels. The developed model incorporates a
  Navier-type boundary condition and introduces an empirical\, viscosity-in
 dependent correlation for the slip length\, validated in Hele-Shaw-type fl
 ows with excellent agreement. Notably\, both slip velocity and slip length
  increase monotonically with porosity\, highlighting their intrinsic corre
 lation governed by interfacial momentum transfer mechanisms.\nThe study fu
 rther extends to disordered porous domains\, providing\, for the first tim
 e\, two-dimensional velocity field measurements in coupled free-flow and p
 orous systems with random solid-phase distributions. An asymptotic expansi
 on method yields a multiscale analytical solution at the Representative El
 ementary Volume (REV) scale\, resolving both local and averaged dynamics t
 hrough excess parameter functions that are validated experimentally.\nLast
 ly\, preliminary results on immiscible two-phase flows lay the groundwork 
 for future multiphase microfluidics in porous systems\, establishing a rob
 ust experimental pathway for high-resolution imaging and quantitative anal
 ysis of interfacial dynamics.&nbsp\;\n\nMario Del Mastro is a PhD candidat
 e in Aerospace Engineering at the Technion – Israel Institute of Technol
 ogy\, specializing in experimental and theoretical fluid dynamics at porou
 s–fluid interfaces. His research integrates microfabrication\, µPIV flo
 w visualization\, and multiscale modeling of Darcy–Brinkman systems. He 
 has presented at different international conferences such as InterPore2025
  and EXHFT10 and was awarded the Jacobs Prize for Excellent Publication in
  2025.\n\n\n\n Details: \n 
CATEGORIES:Seminars,סמינרים
LOCATION:Classroom 165\, ground floor\, Library\, Aerospace Eng.

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