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@ARTICLE{Kovacic:625569,
author = {Kovacic, Kristof and kušnar, jernej and Bajt, Sasa and
Sarler, Bozidar},
title = {{N}umerical calculation and experimental validation of
gas-accelerated flat sheet jet},
journal = {Physics of fluids},
volume = {38},
number = {1},
issn = {1527-2435},
address = {[Erscheinungsort nicht ermittelbar]},
publisher = {American Institute of Physics},
reportid = {PUBDB-2025-01131},
pages = {012008},
year = {2026},
abstract = {This study presents the experimentally validated numerical
simulation of a gas-accelerated flat sheetjet, providing
valuable insights into its behaviour. The numerical
calculation, based on the finite volumemethod (FVM) and
volume of fluid (VOF) model, simulates a sheet jet with a
gas Reynolds number of351, liquid Reynolds number of 332,
Weber number of 51 and Capillary number of 0.15. A
gridconvergence study confirmed that realistic behavior
requires at least three computational non-adaptivecells (1.5
μm) across the radius of the sheet’s thinnest region (~5
μm), supplemented by at least twoadaptive mesh refinement
(AMR) levels of the interface, giving a minimum cell size of
375 nm. Acomparison of various numerical cases for the
analyzed multiphase, compressible, and unsteady flowrevealed
that accuracy depends on grid resolution but is not
sensitive to numerical schemes or settings.The developed
numerical model demonstrates high accuracy, with the link
area of the primary sheet(11,000 μm2) overestimated by
$6\%,$ the width (49.2 μm) by $6\%,$ and the length (215
μm) underpredictedby $2\%,$ all within the measurement
uncertainty of $7\%.$ The flow within the sheet jet was
found to belaminar, without any recirculation zones.The
analysis of the sheet jet dynamics identified four
distinctflow regions governed by sheath gas pressure,
surface tension and inertial forces, explaining theevolution
of gas-accelerated flat sheet jets through successive
orthogonal links forming a liquid chain.},
cin = {FS-ML},
ddc = {530},
cid = {I:(DE-H253)FS-ML-20120731},
pnm = {633 - Life Sciences – Building Blocks of Life: Structure
and Function (POF4-633) / DFG project G:(GEPRIS)390715994 -
EXC 2056: CUI: Tiefe Einblicke in Materie (390715994)},
pid = {G:(DE-HGF)POF4-633 / G:(GEPRIS)390715994},
experiment = {EXP:(DE-H253)CFEL-Exp-20150101},
typ = {PUB:(DE-HGF)16},
doi = {10.1063/5.0311193},
url = {https://bib-pubdb1.desy.de/record/625569},
}