Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : March 04, 2023
The ventilation behavior of a natural convection ventilation system with an external flow that ventilates the room by the ventilation effect of natural wind and the circulation action of the natural convection of the heat source was investigated by unsteady CFD analysis. The buoyantPimpleFoam of blueCFD-Core 2020 was used in combination with the scalar mass transport equation. The analysis target was a room of 4m (length) x 3m (width) x 2.5m (height), and two ventilation holes with a diameter of 150mm were provided at both the inflow and outflow. As a result of investigating the diffusive advection of the scalar amount under the condition of the outside air wind speed of 2m/s, it was confirmed that the scalar amount was diffusively ventilated more than 90% within 50 minutes. It was reconfirmed that this system, which uses wind as a driving source and body temperature as a stirring energy source, is very useful from the viewpoint of energy saving.
