Prediction of heat transfer distribution induced by the variation in vertical location of circular cylinder on Rayleigh-Bénard convection using artificial neural network

Young Min Seo, Sudhanshu Pandey, Hyeon Uk Lee, Changyoung Choi, Yong Gap Park (Corresponding Author), Man Yeong Ha (Corresponding Author)

Research output: Contribution to journalArticleScientificpeer-review

11 Citations (Scopus)

Abstract

The present study investigates the flow and thermal fields of Rayleigh-Bénard convection (RBC) in a rectangular channel with an internal circular cylinder. The parameters considered are Rayleigh number (104≤Ra≤106), Prandtl number (Pr = 0.7), and irreversibility distribution ratio (φ = 1). The vertical distance (δ) in the range of -0.2 ≤ δ ≤ 0.2 is the major simulation parameter in present study. The results are analyzed based on the iso-surface of temperature, vortical structure with orthogonal enstrophy distribution, and entropy generations. Additionally, Nusselt number (Nu) and Bejan number (Be) are obtained to analyze the heat transfer characteristics and irreversibility, respectively. The Rayleigh number and the vertical distance significantly influence the flow and thermal characteristics within the channel. Besides, an artificial neural network (ANN) model is used to predict the distribution of local Nusselt number. The performance of present ANN model is evaluated by comparing the tendency and quantitative values with the direct numerical simulation (DNS) results. The results show that the ANN model used in this study can precisely predict the correlation between the input parameters and output parameter with lesser computational time and cost compared to the DNS.

Original languageEnglish
Article number106701
JournalInternational Journal of Mechanical Sciences
Volume209
DOIs
Publication statusPublished - 1 Nov 2021
MoE publication typeA1 Journal article-refereed

Keywords

  • Artificial neural network
  • Heat transfer performance
  • Irreversibility
  • Rayleigh-Bénard convection
  • Supervised learning algorithm
  • Vertical distance

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