The objective of this work is to discuss the turbulent air hydro-thermal phenomena over a rectangular microchannel with different types of baffle (rectangular, triangular, and trapezoidal) mounted on both the walls of the microchannel. The finite volume method with the second order upwind scheme has been utilized to discretize the governing equations and to study the turbulent airflow characteristics; the SST k-ꞷ turbulence model has been adopted. For nine different cases, the different characteristics of fluid flow phenomena and thermal behaviour with the variations in the Reynolds number ranging from [5,000-25,000] and for three different values of inter baffle spacing have been studied in this manuscript. Due to the presence of baffle, it is revealed that the vortex arises on the upper wall and the thermal phenomena enhances with the decrease in inter baffle spacing.
This paper uses the numerical simulation to investigate the turbulent flow around two high-rise buildings in proximity on the pedestrian's level at the different relative hights, gaps and wind velocities. The K-e model was used to simulate turbulence effects.
Numeryczną symulację turbulentnego przepływu powietrza przez modelowe wypełnienia wykonano za pomocą licencyjnego oprogramowania CFD "Fluent". Zbadano, jak geometria elementów wypełnienia i warunki hydrodynamiczne wpływają na wartość oporu hydrodynamicznego badanych układów. Wynik teoretycznych przewidywań porównano z danymi doświadczalnymi uzyskanymi w tych samych warunkach.
EN
The numerical simulation of air turbulent flow within the model packing has been performed with the use of the "Fluent" CFD software. The influence of the packing geometry and hydrodynamic conditions on packing hydrodynamic resistance was determined. The theoretical results were compared with the experimental data obtained under the same conditions.
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