Novel Mixed Approximate Deconvolution Large-Eddy Simulation Models for Two-Phase Flows
Abstract
Approximate Deconvolution (AD) frameworks for Large-Eddy Simulation (LES) offer a promising approach for modeling multiscale interactions in turbulent multiphase flows. However, some conventional formulations exhibit structural inconsistencies, identified in our previous work [Amani E., Molaei M.B., Ghorbani M. 2024 Novel mixed approximate deconvolution subgrid-scale models for large-eddy simulation. Physics of Fluids 36] which can impact the accuracy and robustness of AD-LES. To address this issue, the present study extends a family of structurally consistent AD closures to turbulent two-phase flows. Specifically, we introduce the Alternative Local Dynamic Model with Kinetic energy equation (A-LDMK), an improved non-equilibrium one-equation mixed eddy-viscosity AD framework. These closures are evaluated through a posteriori analyses of a single-phase turbulent channel flow and a turbulent two-phase gas-liquid mixing layer. The results indicate that the consistent frameworks enhance numerical stability and can sustain energy backscatter under less restrictive stability constraints compared to standard dynamic procedures. Specifically, the proposed A-LDMK provides the most accurate prediction of the multiscale primary atomization cascade in terms of droplet size distribution, compared to the other assessed closures.
Versions
Related
- Simulation-free approximate Bayesian computation for stochastic reaction networks
- Half the Interference, Most of the Answer: Approximate Quantum Simulation via Path-Sum Pruning
- Approximate Counting for Mixed p-Spin Glasses in Weak External Fields via Cluster Expansion
- Monte Carlo simulation of mixed spin-orbit ordering
- A mixed leading variable physics-informed neural network for nonsmooth dynamics simulation in contact systems
BibTeX
@misc{molaei2026novel,
title = {{Novel Mixed Approximate Deconvolution Large-Eddy Simulation Models for Two-Phase Flows}},
author = {Mohammad Bagher Molaei and Ehsan Amani and Morteza Ghorbani},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.41975},
eprint = {2610.41975},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.41975},
note = {CC BY-NC-ND 4.0},
}
RIS
TY - UNPB
TI - Novel Mixed Approximate Deconvolution Large-Eddy Simulation Models for Two-Phase Flows
AU - Mohammad Bagher Molaei
AU - Ehsan Amani
AU - Morteza Ghorbani
PY - 2026
DA - 2026/10/30
PB - arXiv
DO - 10.48550/arxiv.2610.41975
UR - https://arxiv.org/abs/2610.41975
AB - Approximate Deconvolution (AD) frameworks for Large-Eddy Simulation (LES) offer a promising approach for modeling multiscale interactions in turbulent multiphase flows. However, some conventional formulations exhibit structural inconsistencies, identified in our previous work [Amani E., Molaei M.B., Ghorbani M. 2024 Novel mixed approximate deconvolution subgrid-scale models for large-eddy simulation. Physics of Fluids 36] which can impact the accuracy and robustness of AD-LES. To address this issue, the present study extends a family of structurally consistent AD closures to turbulent two-phase flows. Specifically, we introduce the Alternative Local Dynamic Model with Kinetic energy equation (A-LDMK), an improved non-equilibrium one-equation mixed eddy-viscosity AD framework. These closures are evaluated through a posteriori analyses of a single-phase turbulent channel flow and a turbulent two-phase gas-liquid mixing layer. The results indicate that the consistent frameworks enhance numerical stability and can sustain energy backscatter under less restrictive stability constraints compared to standard dynamic procedures. Specifically, the proposed A-LDMK provides the most accurate prediction of the multiscale primary atomization cascade in terms of droplet size distribution, compared to the other assessed closures.
ER -