Modeling of natural turbulent flow in a passively heated zone

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Abstract

In the present study, a modified turbulence model has been developed having the goals of representing the dominant buoyancy effect, and also the low turbulence due to buoyancy and the viscous effects in the vicinity of the wall for a zone heated passively with a Trombe wall, where the magnitudes of aspect ratio and Rayleigh number equal to one and 1010, respectively. Standard viscosity/diffusivity and Daly Harlow approximations for the definition of the scalar quantities are used and compared to each other. The model and the code solving the governing equations may be applied to similar structures, namely, enclosures with aspect ratio about one, having inlet and outlet openings on the heated side. Also, improving the computational convergence and decreasing the computer time are goals of this work.

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