caa a22 4500 465756689 CHVBK 20180323111849.0 cr unu---uuuuu 170327e19900701xx s 000 0 eng 10.1007/BF00418051 doi (NATIONALLICENCE)springer-10.1007/BF00418051 On the stability of the natural convection flow in a square cavity heated from the side [Elektronische Daten] [R. Henkes, C. Hoogendoorn] The stability of the steady laminar natural-convection flow of air (Prandtl number 0.71) and water (Prandtl number 7.0) in a square cavity is calculated by numerically solving the unsteady, two-dimensional Navier-Stokes equations. The cavity has a hot and cold vertical wall and either conducting or adiabatic horizontal walls. The flow looses its stability at a lower Rayleigh number in the case of conducting horizontal walls than in the case of adiabatic horizontal walls. The flow of water is more stable than the flow of air. Directly above the critical Rayleigh number the unsteady flow shows a single-frequency oscillation. Air in the case of adiabatic horizontal walls is an exception and shows two frequencies. The instabilities in the cavity seem to be related to well-known elementary instability mechanisms. In the case of conducting and adiabatic horizontal walls the instability seems to be related to a Rayleigh/Bénard and a Tollmien-Schlichting instability respectively. The second instability for air in the case of adiabatic horizontal walls seems to be related to an instability after a hydraulic jump. Kluwer Academic Publishers, 1990 Henkes R. Department of Applied Physics, Delft University of Technology, P.O. Box 5046, 2600 GA, Delft, The Netherlands aut Hoogendoorn C. Department of Applied Physics, Delft University of Technology, P.O. Box 5046, 2600 GA, Delft, The Netherlands aut Applied Scientific Research Kluwer Academic Publishers 47/3(1990-07-01), 195-220 0003-6994 47:3<195 1990 47 10494 https://doi.org/10.1007/BF00418051 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00418051 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Henkes R. Department of Applied Physics, Delft University of Technology, P.O. Box 5046, 2600 GA, Delft, The Netherlands aut NATIONALLICENCE 700 1- Hoogendoorn C. Department of Applied Physics, Delft University of Technology, P.O. Box 5046, 2600 GA, Delft, The Netherlands aut NATIONALLICENCE 773 0- Applied Scientific Research Kluwer Academic Publishers 47/3(1990-07-01), 195-220 0003-6994 47:3<195 1990 47 10494 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer