Investigation of opening positions on the natural ventilation in a low-rise building by CFD analysis

Abstract

A three dimensional computational fluid dynamics (CFD) simulation of coupled outdoor wind flow and indoor air flow is presented to investigate the effective parameters on cross ventilation and flow patterns inside an isolated house. Different opening positions are used to investigate the effect position of opening on the flow patterns inside the building. The study employed the low Reynolds number (LRNM) with Steady Reynolds Averaged Navier -Stokes (RANS) RNG k-e modelling approaches in the simulation. The CFD simulation is validated based on detailed wind tunnel experiments. The study showed that the efficiency of natural ventilation can be increased by following the behaviour of flow stream inside the house and controlling the recirculation areas which are formed in different rooms.