Development and assessment of a target-ω interfacial turbulence-damping model for stratified gas--liquid flow
Abstract
Interfacial turbulence damping is required in Reynolds-averaged simulations of stratified gas--liquid flows when strong interfacial velocity gradients are present. In this work, we develop a target-ω interfacial damping formulation for the low-Reynolds-number Wilcox-type k--ω model in a one-field RANS/VOF framework. A gas-side target value of the specific dissipation rate ω is constructed from an effective interfacial wall coordinate determined from the local resolved flow. The constructed target-ω provides a smooth transition between the viscous and logarithmic limits through power-law blending and requires no calibration of model constants against target data. \textcolor{black}{The formulation is first assessed against three gas-layer DNS cases at Reτ≃180 with different interface velocities. The model reproduces the principal features of the mean velocity, turbulent kinetic energy and Reynolds shear-stress distributions, while showing substantially weaker sensitivity to the near-interface grid resolution than the Egorov-type formulation, although some grid dependence remains on the coarsest mesh. The assessment is then extended to the co-current Fabre stratified-flow experiment at a higher Reynolds number and to the counter-current Stäbler experiment}. In both cases, the present formulation provides generally good predictions of the gas-side mean flow and turbulence statistics without case-specific adjustment. For the Stäbler case, in which the liquid level develops as part of the coupled two-phase solution, the predicted mean liquid depth agrees closely with the measured value. These results indicate that the target-ω formulation provides a consistent interfacial turbulence-damping treatment for resolved large gas--liquid interfaces over the range of conditions considered.
Versions
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BibTeX
@misc{wu2026development,
title = {{Development and assessment of a target-$ω$ interfacial turbulence-damping model for stratified gas--liquid flow}},
author = {Di Wu and Junda Liu and Qiaopeng Wang and Liu Liu and Dongling Wu and Ping Zhou and Pengyu Shi},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.37376},
eprint = {2610.37376},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.37376},
note = {CC BY-NC-SA 4.0},
}
RIS
TY - UNPB
TI - Development and assessment of a target-ω interfacial turbulence-damping model for stratified gas--liquid flow
AU - Di Wu
AU - Junda Liu
AU - Qiaopeng Wang
AU - Liu Liu
AU - Dongling Wu
AU - Ping Zhou
AU - Pengyu Shi
PY - 2026
DA - 2026/10/27
PB - arXiv
DO - 10.48550/arxiv.2610.37376
UR - https://arxiv.org/abs/2610.37376
AB - Interfacial turbulence damping is required in Reynolds-averaged simulations of stratified gas--liquid flows when strong interfacial velocity gradients are present. In this work, we develop a target-ω interfacial damping formulation for the low-Reynolds-number Wilcox-type k--ω model in a one-field RANS/VOF framework. A gas-side target value of the specific dissipation rate ω is constructed from an effective interfacial wall coordinate determined from the local resolved flow. The constructed target-ω provides a smooth transition between the viscous and logarithmic limits through power-law blending and requires no calibration of model constants against target data. \textcolor{black}{The formulation is first assessed against three gas-layer DNS cases at Re_τ≃180 with different interface velocities. The model reproduces the principal features of the mean velocity, turbulent kinetic energy and Reynolds shear-stress distributions, while showing substantially weaker sensitivity to the near-interface grid resolution than the Egorov-type formulation, although some grid dependence remains on the coarsest mesh. The assessment is then extended to the co-current Fabre stratified-flow experiment at a higher Reynolds number and to the counter-current Stäbler experiment}. In both cases, the present formulation provides generally good predictions of the gas-side mean flow and turbulence statistics without case-specific adjustment. For the Stäbler case, in which the liquid level develops as part of the coupled two-phase solution, the predicted mean liquid depth agrees closely with the measured value. These results indicate that the target-ω formulation provides a consistent interfacial turbulence-damping treatment for resolved large gas--liquid interfaces over the range of conditions considered.
ER -