Free VKI Online Seminar - On the gas-liquid coupling instability in jet wiping using traditional and novel numerical models
We invite you to participate in the online seminar "On the gas-liquid coupling instability in jet wiping using traditional and novel numerical models" that will be delivered by David Barreiro, Collaborative PhD from University of A Coruña and the von Karman Institute for Fluid Dynamics on 27 June from 11AM to 12 AM (Brussels CEST).
Abstract:The jet wiping process is a contactless metering technique implemented in continuous hot-dip galvanizing lines to control the coating mass deposited on a steel strip via high-speed gas jets. The interaction between the gas jets and the liquid film is unsteady, resulting in long-wavelength defects (undulations) in the final product, of great concern in industry for quality standards.This seminar will explore the hydrodynamic mechanisms responsible for these undulations using numerical simulations in OpenFOAM and modal analysis; in particular, the numerical model combines the Volume of Fluid (VOF) and Large Eddy Simulation (LES) techniques, and the dominant flow patterns are extracted via multiscale Proper Orthogonal Decomposition (mPOD). The methodology is validated against laboratory experiments and then applied to investigate the dynamics of jet wiping under various conditions. The goal is to uncover the instability mechanisms in different wiping scenarios and to identify scaling laws that allow extrapolation of the results to industrial configurations, which remain unfeasible with current state-of-the-art techniques. In this sense, the seminar will also introduce a novel hybrid formulation that implements a two-way coupling between an Integral Boundary Layer (IBL) model for the liquid film and a single-phase solver in OpenFOAM for the gas jet, with the objective of simulating the full industrial conditions. Preliminary results are very promising.
Biography: David Barreiro received a Bachelor’s Degree in Industrial Technology Engineering in 2017 and a Master’s Degree in Industrial Engineering in 2019, both from the University of A Coruña. He then enrolled in the PhD program at the same university, collaborating with the von Karman Institute, where he completed a research stay in 2022. The seminar will cover the topic of his PhD thesis, focusing on the numerical investigation of the hydrodynamic mechanisms responsible for defects in the jet wiping process in continuous hot-dip galvanizing lines.
Please check our eligibility criteria before registering.
Event Information
Event Date | 27-06-2024 11:00 am |
Event End Date | 27-06-2024 12:00 pm |
Cut off date | 26-06-2024 5:00 pm |
Location | von Karman Institute for Fluid Dynamics |