Abstract
The pattern formation of a Poiseuille flow in a rectangular duct, which is heated from below, is studied experimentally for the Reynolds number Re = 200 within the Rayleigh number range 4 ×108 ≤ Ra ≤ 7 ×108 . The channel has an aspect ratio of Γ yz = width : height = 25 : 2. As working fluid, water (Pr ≈ 6) is used. In order to study the influence of buoyancy on the forced flow, velocity fields are measured plane parallel to the heated bottom plate by means of Particle Image Velocimetry (PIV). Furthermore, the measured data is analyzed concerning the flow structure formation as a function of the temperature difference between the inflow and the bottom of the duct. In this connection, two different mechanisms can be distinguished, which cause the transition from a laminar to a turbulent flow: a successively progressing transition on the one hand and, above a certain Archimedes number Ar, an abrupt transition.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
Asplund, M., Nordlund, A., Trampedach, R., Allende Prieto, C., Stein, R.F.: Line formation in solar granulation. Astronomy and Astrophysics 359, 729–742 (2000)
Benderradji, A., Haddad, A., Taher, R., Médale, M., Abid, C., Papini, F.: Characterization of Fluid Flow Patterns and Heat Transfer in Horizontal Channel Mixed Convection. Heat Mass Transfer 44, 1465–1476 (2008)
Chang, M.Y., Yu, C.H., Lin, T.F.: Changes of Longitudinal Vortex Roll Structure in a Mixed Convective Air Flow Through a Horizontal Plane Channel: an Experimental Study. International Journal of Heat and Mass Transfer 40, 347–363 (1997)
Chang, M.Y., Lin, T.F.: Experimental Study of Aspect Ratio Effects on Longitudinal Vortex Flow in Mixed Convection of Air in a Horizontal Rectangular Duct. International Journal of Heat and Mass Transfer 41, 719–733 (1997)
Chiu, K.C., Rosenberger, F.: Mixed Convection Between Horizontal Plates - I. Entrance Effects. Heat Mass Transfer 30, 1645–1654 (1987)
Chiu, K.C., Ouazzani, J., Rosenberger, F.: Mixed Convection Between Horizontal Plates - II. Fully Developed Flow. Heat Mass Transfer 30, 1655–1662 (1987)
Dogan, A., Sivrioglu, M., Baskaya, S.: Experimental Investigation of Mixed Convection Heat Transfer in a Rectangular Channel with Discrete Heat Sources at the Top and at the Bottom. International Communications in Heat and Mass Transfer 32, 1244–1252 (2005)
Gregory, D., Rowntree, P.R.: A Mass Flux Convection Scheme with Representation of Cloud Ensemble Characteristics and Stability-Dependent Closure. Monthly Weather Review 118, 1483–1506 (1990)
Morgan, W.J.: Convection Plumes in the Lower Mantle. Nature 230, 42–43 (1971)
White, F.M.: Viscous Fluid Flow. McGraw-Hill, New York (1974)
Webster, P.J.: The Role of Hydrological Processes in Ocean-Atmosphere Interactions. Reviews of Geophysics 32, 427–476 (1994)
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2013 Springer-Verlag Berlin Heidelberg
About this chapter
Cite this chapter
Mey, T., Westhoff, A., Wagner, C. (2013). Experimental Investigation of Flow Structure Formation in a Heated Duct Flow. In: Dillmann, A., Heller, G., Kreplin, HP., Nitsche, W., Peltzer, I. (eds) New Results in Numerical and Experimental Fluid Mechanics VIII. Notes on Numerical Fluid Mechanics and Multidisciplinary Design, vol 121. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-35680-3_81
Download citation
DOI: https://doi.org/10.1007/978-3-642-35680-3_81
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-35679-7
Online ISBN: 978-3-642-35680-3
eBook Packages: EngineeringEngineering (R0)