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Being 20% of the building's total energy consumption, air conditioning can be a key to reduce significantly the energy demand and environmental impact. The blame lies in the compressor. The ejector is a simple equipment with zero energy consumption, ideal to assist the mechanical compressor. However, the ejector flow domain is complex and difficult to compute, once that is highly turbulent. The ordinary turbulence models are based on Reynolds Averaged Navier-Stokes, however, they cannot accurately compute the turbulence behavior inside the ejector. The optimal way to reproduce the interior flow is DNS, nonetheless, the computational cost is the major problem. This paper proposes two possible solutions to make DNS possible nowadays.
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