Heat exchange in an attic space

Flow Field and Reynolds Stress Distribution in Low Turbulence Natural Convection in a Triangular Cavity

“…Examining the same problem, Hasani and Chung [6] also discovered, for laminar flow situation, that the number of cells increases with the Rayleigh number. However, while following the procedure reported by Hasani and Chung [6] to simulate an attic of about the size considered in the present study, Haese and Teubner [14] ended up with a flow dominated by single cell. This "strange" result could be attributed to the symmetry assumption they made.…”

“…For an actual size attic, however, a Rayleigh number as high as 10 10 or 10 11 is expected. Only Haese and Teubner [14] investigated this range for cavity heated from the base but failed to apply turbulence modelling. Hence, turbulent quantities could not be reported.…”

Visualization of natural convection heat transport using heatline method in porous non-isothermally heated triangular cavity

“…(7), (8) and (14) the value of 0.1 is taken for under-relaxation parameter. The uppermost grid-point on each vertical grid line coincided with the top wall of the triangular enclosure as indicated by Haese and Teubner [32] and Asan and Namli [15], as seen in Fig. 1b.…”

Factors of quality reduction of exploitation of pitched roofs with a cold attic in conditions of dense urban development

“…Active methods of protection against formation of ice are much less often used: artificial heating or processing by anti-icing components of an eaves part of a roof. As a result on fight against icicles, icings and leakages are spent considerable financial means, but not all of them become applicable because of complexity of execution, small efficiency or a contradiction to policy of energy saving [7][8][9][10][11][12]. Another side of the problem is the formation of condensate on the inside surfaces of the roof.…”