Download PDF by J. Y. Tu, C. A. J. Fletcher (auth.), Dr. Dieter Leutloff,: Computational Fluid Dynamics: Selected Topics

By J. Y. Tu, C. A. J. Fletcher (auth.), Dr. Dieter Leutloff, Dr. Ramesh C. Srivastava (eds.)

Computational equipment and modelling is of turning out to be significance in basic technology in addition to in functions in and in environmental study. during this topical quantity, compiled in honor of Professor K.G. Roesner of the Darmstadt Institute of know-how, the readers locate very important contributions within the box of turbulent boundary layers, the Tsunami challenge, crew invariant resolution of hydrodynamic equations, non-linear waves, modelling of the matter of evaporation-condensation, the precise resolution of discrete versions of the Boltzmann equation and so forth. The booklet addresses researchers and engineers either within the mechanical sciences and in medical computing.

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015 = 0,556 and t = 4,015 to three. 52) appearing in this figure was in fact explained above as the impossibility for the eighth layers to find room within the height of the tank, It is interesting to observe that the two ultimate interfaces were already at the same height as early as t = 1. 4b) is constant in each layer with a large gradient through the interfaces and near the horizontal walls (the concentration is kept fixed at these walls), The temperature field (Figs. 1 T o < ~ (b) ~--,---rl-'I--'I--'I T O.

PI/3d - 'P = 311"/2 =---11 » ...... lI/1J"' .. · " " · · ) / / 1111 11 " 111'' ' "",,. l\\\\\\'''·--· .. , .. ,· . . . , .. " . ~-=-::::::::::::::::=:::::::: - - Fig. 24. PI/3d (ur,z) - 'P 30 =0 '" .. " " •• - ' - - - q ' Fig. 25. PI/3d (ur,z) - 'P = 11" Fig. 26. Cylinder flow after 4000 steps Fig. 27. Cylinder flow after 14000 steps Fig. 28. Cylinder flow after 20000 steps Fig. 29. Cylinder flow after 21000 steps __ _ a~_ \ \ - - - - ... Fig. 30. Cylinder flow after 22000 steps Fig. 31. Cylinder flow after 22000 steps 31 References 1.

S):~ ~ . :. 556 lines ~. '*~ ~~ fn~ ,\,, ~ ~ !! :::::? 188 0. 300 Fig. 2. Streamlines and iso-concentration lines: first phase of the formation of layers work against gravitation. This explains why the first convective cell appears at the bottom of the tank near the heated walL Such a behaviour has been experimentally observed for exemple in [21], [22]. The physical process above described was first observed in [36] and applied to the present problem in [20]. After the first cell has been created, it acts like a boundary on the fluid located above and a second layer forms by a similar mechanism, and so on.

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