@inproceedings{0c8c344fb7844cacb019291e6f32f5cb,
title = "A dual-grid hybrid RANS/LES model for under-resolved near-wall regions and its application to heated and separating flows",
abstract = "A hybrid RANS/LES model is presented, in which RANS and LES contributions to the subgrid-scale (SGS) Reynolds stresses are computed on two distinct grids and are seamlessly blended. The instantaneous, fluctuating SGS Reynolds stress field is supported by a statistical RANS eddy viscosity model in regions where the LES grid is considered as coarse. The present hybrid model acts as a near-wall correction to the LES, while it retains the fluctuating nature of the flow field. The dual computation enables the LES to be run on grids with very low wall-normal resolution, while the RANS model is solved on wall-refined high-aspect ratio grids. Predictions of a heated plane channel flow for a range of Reynolds numbers are generally improved in comparison to conventional LES, with the wall-nearest grid point lying far in the logarithmic layer. Current work also includes a validation on a ribbed channel flow with high blockage ratio, where results are very promising.",
author = "P. Nguyen and J. Uribe and I. Afgan and D. Laurence",
note = "Funding Information: We would like to thank A. Ali for helpful discussions. The present work is made possible with funding by the EPSRC and EDF Energy R&D UK Centre. Furthermore, this work made use of the facilities of N8 HPC, provided and funded by the N8 consortium and EPSRC (Grant No.EP/K000225/1). The Centre is co-ordinated by the Universities of Leeds and Manchester. Publisher Copyright: {\textcopyright}2018 Begell House, Inc.; 9th International Symposium on Turbulence Heat and Mass Transfer, THMT 2018 ; Conference date: 10-07-2018 Through 13-07-2018",
year = "2018",
doi = "10.1615/THMT-18.630",
language = "British English",
series = "Proceedings of the International Symposium on Turbulence, Heat and Mass Transfer",
publisher = "Begell House Inc.",
pages = "605--616",
booktitle = "THMT 2018 - Proceedings of the 9th International Symposium on Turbulence Heat and Mass Transfer",
address = "United States",
}