The study of natural convection and heat transfer in the enclosure with heat transfer coupled in natural convection

In this paper, numerical investigation using SIMPLE algorithm with QUICK scheme for enclosure natural convection and heat transfer with building envelop has been conducted. The results suggest that the flow and heat transfer are influenced by the thickness and the thermal conductivity of building envelop. When the thickness of envelop is smaller and the thermal conductivity of envelop is bigger, the temperature enclosure is influenced intensively by the outdoor environments. With increase of the thickness of envelop, flow and heat transfer turn slighter. When the thickness of envelop is over some critical value, it can be found that flow and heat transfer will turn slow. The flow and heat transfer turn slight with certain envelop. When the thickness of envelop exceeds certain critical number, the increasing of the thickness is invalid for heat transfer. The temperature distribution changes obviously. When the thermal conductivity of envelop is over some critical value, it can be found that the increasing trend of flow and heat transfer may be skip.