A continuous data assimilation closure for modeling statistically steady turbulence in large-eddy simulation
arxiv(2023)
Abstract
A closure model is presented for large-eddy simulation (LES) based on the
three-dimensional variational data assimilation algorithm. The approach aims at
reconstructing high-fidelity kinetic energy spectra in coarse numerical
simulations by including feedback control to represent unresolved dynamics
interactions in the flow as stochastic processes. The forcing uses statistics
obtained from off-line high-fidelity data and requires only few parameters
compared to the number of degrees of freedom of LES. This modeling strategy is
applied to geostrophic turbulence on the sphere. It proves to accurately
recover the energy spectra, the interscale energy transfer and the zonal
velocity profiles in the coarse model, for three generic situations.
MoreTranslated text
AI Read Science
Must-Reading Tree
Example
![](https://originalfileserver.aminer.cn/sys/aminer/pubs/mrt_preview.jpeg)
Generate MRT to find the research sequence of this paper
Chat Paper
Summary is being generated by the instructions you defined