Flow Above a Heated Plate in an Ascending Current
Tóm tắt
An analysis of the results of numerical experiments in which the two-dimensional flow near a plate placed across an ascending fluid current was simulated is presented. The plate temperature was higher than that of the fluid. Fluid flows with a Prandtl number 0.25 ≤ Pr ≤ 7 were considered on the moderate Reynolds and Richardson number ranges 25 < Re ≤ 100 and 0 ≤ Ri < 20. Under these conditions, two flow patterns were observable, which differed from each other by the intensity of the transverse oscillations of a system consisting of attached twin vortices and the near wake. For different Prandtl numbers, in the (Re, Ri1/2) plane the pattern stability boundaries were established, together with the distinctive features of pattern-to-pattern transition. It was found that the vortex arrangement in the wake above the heated plate can differ from that in the von Kàrmàn street in the absence of buoyancy
Tài liệu tham khảo
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