Packing size and shape effects on forced convection in large rectangular packed ducts with asymmetric heating

Packing size and shape effects on forced convection in large rectangular packed ducts with asymmetric heating

An experimental and numerical investigation of fully developed forced convection in large rectangular packed ducts is presented. The horizontally oriented ducts have the length-to-separation distance ratio of L/H=16 with two aspect ratios of W/H=8 and 4. A constant heat flux is supplied to the top w...

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Veröffentlicht in:International journal of heat and mass transfer 1999-09, Vol.42 (17), p.3267-3277
Hauptverfasser: Demirel, Y, Abu-Al-Saud, B.A, Al-Ali, H.H, Makkawi, Y
Format: Artikel
Sprache:eng
Schlagworte:
Applied sciences
Convective and constrained heat transfer
Ducts
Energy
Energy. Thermal use of fuels
Exact sciences and technology
Flow of fluids
Fundamental areas of phenomenology (including applications)
Heat flux
Heat transfer
Heating
Mathematical models
Natural convection
Nusselt number
Physics
Pressure drop
Temperature
Theoretical studies. Data and constants. Metering
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Zusammenfassung:An experimental and numerical investigation of fully developed forced convection in large rectangular packed ducts is presented. The horizontally oriented ducts have the length-to-separation distance ratio of L/H=16 with two aspect ratios of W/H=8 and 4. A constant heat flux is supplied to the top wall, while the bottom and side walls are insulated. Packing of hard polyvinyl chloride Raschig rings with outside diameters of 48 and 34 mm, and expanded polystyrene spheres with diameters of 48, 38 and 29 mm are used in the air flow passage. The experiments are carried out for 200
ISSN:0017-9310
1879-2189
DOI:10.1016/S0017-9310(98)00370-6