caa a22 4500 465756700 CHVBK 20180323111849.0 cr unu---uuuuu 170327e19901001xx s 000 0 eng 10.1007/BF00386241 doi (NATIONALLICENCE)springer-10.1007/BF00386241 Numerical computation of high Rayleigh number natural convection and prediction of hot radiator induced room air motion [Elektronische Daten] [A. Lankhorst, C. Hoogendoorn] The two-dimensional stationary turbulent buoyant flow and heat transfer in a cavity at high Rayleigh numbers was computed numerically. The k−ε turbulence model was used. The time-averaged equations for momentum, energy and continuity, which are coupled to the turbulence equations, were solved using a finite difference formulation. In order to validate the computer code, a comparison exercise was carried out. The test results are in good agreement with the internationally accepted benchmark solution. Grid-refinement shows the necessity of a very fine grid at high Rayleigh numbers with especially small grid-distances in the near-wall region. The computed boundary layer velocity profiles are in excellent agreement with available experimental data. The local heat transfer in the turbulent part of the boundary layers is predicted 20% too high. Computations were carried out for the natural convective flow in a room induced by a hot radiator and a cold window. Various radiator configurations and types of thermal boundary conditions were applied including thermal radiation interaction between surfaces. Kluwer Academic Publishers, 1990 Lankhorst A. Faculty of Applied Physics, Heat Transfer Section, Delft University of Technology, P.O. Box 5046, 2600 GA, Delft, The Netherlands aut Hoogendoorn C. Faculty of Applied Physics, Heat Transfer Section, Delft University of Technology, P.O. Box 5046, 2600 GA, Delft, The Netherlands aut Applied Scientific Research Kluwer Academic Publishers 47/4(1990-10-01), 301-322 0003-6994 47:4<301 1990 47 10494 https://doi.org/10.1007/BF00386241 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00386241 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Lankhorst A. Faculty of Applied Physics, Heat Transfer Section, Delft University of Technology, P.O. Box 5046, 2600 GA, Delft, The Netherlands aut NATIONALLICENCE 700 1- Hoogendoorn C. Faculty of Applied Physics, Heat Transfer Section, Delft University of Technology, P.O. Box 5046, 2600 GA, Delft, The Netherlands aut NATIONALLICENCE 773 0- Applied Scientific Research Kluwer Academic Publishers 47/4(1990-10-01), 301-322 0003-6994 47:4<301 1990 47 10494 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer