A simple effective viscosity formulation for turbulent flow and heat transfer in compact heat exchangers

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DOIResolve DOI: http://doi.org/10.1080/01457632.2011.584807
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Proceedings titleHeat Transfer Engineering
ConferenceSeventh International Conference on Enhanced, Compact and Ultra-Compact Heat Exchangers: From Microscale Phenomena to Industrial Applications, Heredia, Costa Rica, September 13-18, 2009
Pages411; # of pages: 8
AbstractA simple algebraic methodology for computing turbulent stresses and fluxes in arrays of heat exchanger elements is proposed. An effective Reynolds number is computed from the back-projection of the friction or heat transfer factor onto the low-Reynolds number profile. This is then used to obtain the turbulent viscosity for fluid friction, or turbulent Prandtl number for heat transfer. It is shown that under certain circumstances, the resulting mathematical expression is consistent with the Brinkman-Forchheimer modified form of Darcy’s law and also with Reynolds’ quadratic form for frictional/heat transfer resistance. The model is critically appraised in comparison to empirical data for compact and tube bank heat exchangers. The circumstances where it renders a good predictive measure are highlighted and discussed critically.
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AffiliationNRC Institute for Chemical Process and Environmental Technology; National Research Council Canada
Peer reviewedNo
NRC number51913
NPARC number18398977
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Record identifier999a2a3a-850e-47da-92a8-c69a58c6a527
Record created2011-08-10
Record modified2016-05-09
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