Evaluation of turbulence models for simulating flow and heat transfer in cross-corrugated triangular channels

Xiaoping Liu, Jianlei Niu

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

Abstract

A novel exchanger structure, i.e., cross-corrugated triangular ducts has been proposed recently to provide high heat transfer capabilities in air-to-air heat exchangers. The efficiency improvement is attributed to the pattern of flow that undergoes abrupt turnaround, contraction and expansion. The heat transfer characteristics and friction performance in this complex geometry are of great importance for system design. In this study, periodic fully developed fluid flow and heat transfer inside such structure under uniform wall temperature condition are numerically investigated. For the purpose of model performance evaluation, seven turbulence models, i.e., Ske, RLZ, RNG, sstkw, Trans-sst, k-kl-w and RSM, are employed to study the hydrodynamic characteristics of this channel. The segment mean Nusselt numbers (Nu) and friction factors (f) are presented and compared with the available correlations and experimental data. The results show that the best predictions are provided by RSM model and thus it is highly recommended for application. The differences between simulated and experimental Nu values are within 7%.
Original languageEnglish
Title of host publicationIndoor Air 2014 - 13th International Conference on Indoor Air Quality and Climate
PublisherInternational Society of Indoor Air Quality and Climate
Pages257-263
Number of pages7
Publication statusPublished - 1 Jan 2014
Event13th International Conference on Indoor Air Quality and Climate, Indoor Air 2014 - Hong Kong, Hong Kong
Duration: 7 Jul 201412 Jul 2014

Conference

Conference13th International Conference on Indoor Air Quality and Climate, Indoor Air 2014
Country/TerritoryHong Kong
CityHong Kong
Period7/07/1412/07/14

Keywords

  • Cross-corrugated triangular duct
  • Heat transfer
  • Numerical simulation
  • Transitional flow

ASJC Scopus subject areas

  • Pollution
  • Building and Construction
  • Health, Toxicology and Mutagenesis
  • Computer Science Applications

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