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RESEARCH PRODUCT
An experimental investigation on natural convection of air in a vertical channel
Giuseppe RodonoA. La PicaR. Volpessubject
Fluid Flow and Transfer ProcessesPhysicsVertical channelHeating powerNatural convectionMechanical EngineeringReynolds numberGeometryRayleigh numberCondensed Matter PhysicsNusselt numbersymbols.namesakeHeat fluxsymbolsCommunication channeldescription
Abstract The free convection of air in a vertical channel is studied experimentally in a laboratory model of height H = 2.6 m and rectangular cross-section b × s , with b = 1.2 m and the channel width s variable. One of the channel walls is heated with a uniform heat flux. Tests are made with different values of channel gap and heating power ( s = 7.5, 12.5, 17 cm; q c = 48–317 W m −2 ). On the basis of the results two empirical formulae are found, giving Nu and Re as functions of Ra and the geometrical parameter s/H ; Nu = 0.9282 Ra 0.2035 (s/H) 0.8972 ; Re = 0.5014 Ra 0.3148 (s/H) 0.418 . The mathematical form of these relationships reproduces other previously published formulae, valid for simpler geometries, though with different constants.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1993-02-01 | International Journal of Heat and Mass Transfer |