2134/38170
Chinasa J. Ojiako
Chinasa J.
Ojiako
Radu Cimpeanu
Radu
Cimpeanu
Hemaka Bandulasena
Hemaka
Bandulasena
Roger Smith
Roger
Smith
Dmitri Tseluiko
Dmitri
Tseluiko
Deformation of a liquid film by an impinging gas jet: modelling and experiments
Loughborough University
2019
Thin-film equation
DNS
Film rupture
Dewetting
Gas–liquid interface
Mathematical Sciences not elsewhere classified
2019-07-02 10:25:50
Conference contribution
https://repository.lboro.ac.uk/articles/conference_contribution/Deformation_of_a_liquid_film_by_an_impinging_gas_jet_modelling_and_experiments/9376340
We consider liquid in a cylindrical beaker and study the deformation of its surface under the influence of an impinging gas
jet. Analyzing such a system not only is of fundamental theoretical interest, but also of industrial importance, e.g., in metallurgical applications. The solution of the full set of governing equations is computationally expensive. Therefore, to obtain initial insight into relevant regimes and timescales of the system, we first derive a reduced-order model (a thin-film equation) based on the long-wave assumption and on appropriate decoupling the gas problem from that for the liquid and taking into account a disjoining pressure. We also
perform direct numerical simulations (DNS) of the full governing equations using two different approaches, the Computational Fluid Dynamics (CFD) package in COMSOL and the volume-of-fluid Gerris package. The DNS are used to validate the results for the thinfilm equation and also to investigate the regimes that are beyond the range of validity of this equation. We additionally compare the computational results with experiments and find good agreement.