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Obtaining Closure for Heat Exchanger Modeling Based on Volume Averaging Theory (VAT)

[+] Author Affiliations
Feng Zhou

Southeast University, Nanjing, China

Nicholas Hansen, Ivan Catton

University of California, Los Angeles, Los Angeles, CA

Paper No. IHTC14-22971, pp. 693-701; 9 pages
doi:10.1115/IHTC14-22971
From:
  • 2010 14th International Heat Transfer Conference
  • 2010 14th International Heat Transfer Conference, Volume 4
  • Washington, DC, USA, August 8–13, 2010
  • Conference Sponsors: Heat Transfer Division
  • ISBN: 978-0-7918-4939-2 | eISBN: 978-0-7918-3879-2
  • Copyright © 2010 by ASME

abstract

Volume Averaging Theory (VAT) has been used to rigorously cast the point-wise conservation of energy, momentum and mass equations into a form that represents the thermal and hydraulic properties of heat exchanger channel morphology. At the lower level, the media is described by a representative elementary volume (REV). Closure terms in the VAT equations are related to a local friction factor and a heat transfer coefficient of the REV. The terms in the closure expressions are complex and are evaluated using scaling suggested by VAT from either experimental data or the output of a CFD code. The VAT equations for a finned tube heat exchanger are given and that the key parameters can be obtained by suitable scaling is demonstrated.

Copyright © 2010 by ASME

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