Numerical study on turbulent mixed convection in a vertical plane channel using hybrid RANS/LES and LES models

Puxian Ding; Shuangfeng Wang; Kai Chen

doi:10.1016/j.cjche.2019.04.007

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Numerical study on turbulent mixed convection in a vertical plane channel using hybrid RANS/LES and LES models

Fluid Dynamics and Transport Phenomena | Updated：2026-01-06

- Numerical study on turbulent mixed convection in a vertical plane channel using hybrid RANS/LES and LES models
- Numerical study on turbulent mixed convection in a vertical plane channel using hybrid RANS/LES and LES models
- 中国化学工程学报（英文版） 2020年28卷第1期页码：1-8
- Affiliations：
  
  Key Laboratory of Enhanced Heat Transfer and Energy Conservation of the Ministry of Education, School of Chemistry and Chemical Engineering, South China University of Technology,Guangzhou,China,510640
- Author bio：
- Funds：
- DOI：10.1016/j.cjche.2019.04.007
  中图分类号：
- 纸质出版：2020
- Accepted：
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Puxian Ding, Shuangfeng Wang, Kai Chen. Numerical study on turbulent mixed convection in a vertical plane channel using hybrid RANS/LES and LES models[J]. 中国化学工程学报（英文版）, 2020,28(1):1-8.

Puxian Ding, Shuangfeng Wang, Kai Chen. Numerical study on turbulent mixed convection in a vertical plane channel using hybrid RANS/LES and LES models[J]. Chinese Journal of Chemical Engineering, 2020, 28(1): 1-8.
Puxian Ding, Shuangfeng Wang, Kai Chen. Numerical study on turbulent mixed convection in a vertical plane channel using hybrid RANS/LES and LES models[J]. 中国化学工程学报（英文版）, 2020,28(1):1-8. DOI： 10.1016/j.cjche.2019.04.007.

Puxian Ding, Shuangfeng Wang, Kai Chen. Numerical study on turbulent mixed convection in a vertical plane channel using hybrid RANS/LES and LES models[J]. Chinese Journal of Chemical Engineering, 2020, 28(1): 1-8. DOI： 10.1016/j.cjche.2019.04.007.

摘要

Abstract

Two Delayed-Detached Eddy Simulation (DDES) models

and a Large-Eddy Simulation (LES) model are used to investigate the turbulent flows and mixed convection between a hot plate and a cold plate

via

the software FLUENT. The two DDES models include Production-limited DDES (PL-DDES) and Improved DDES (IDDES) models. The Wall-Adapting Local Eddy-Viscosity (WALE) model is the used LES model. The numerical computations are performed at Reynolds number

=4494 and different Richardson numbers

=0.025

0.048

0.1. The comparing data is from the Direct Numerical Simulation (DNS) at

=4494 and

=0.048. The comparison reveals that the two DDES models have better performance in predicting time-averaged parameters than the WALE model in the aiding flow. The best predicted time-averaged results are obtained by the PL-DDES model in the opposing flow. Furthermore

the results of different

obtained by the PL-DDES model agree well with the DNS data.

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