HI-02-19-3 -- CFD Analysis on Rising Stream Around a Human Body and Its Effect on Inhalation Air Quality PDF

New indices for evaluating the inhaled air region are proposed in this paper. It expresses the part of the room air that is going to be inhaled by a human. Indoor air pollutants such as VOCs generated from building materials are transported by room air convection and finally exhausted through the outlet opening. In the process of room air convection, the human inhales some portion of the pollutant. The human body is covered by rising stream around it. It is generated by a heat discharge due to metabolism. The mechanism of inhalation is greatly influenced by the rising stream; in order to analyze the inhaled air region in a room, we should take into consideration this rising stream around a human body. This paper analyzed the inhaled air region with consideration of the human body in three different postures by means of CFD analysis. When the human body is standing, it inhales the air of the lower part of room because the rising stream that is generated by metabolic heat draws the air from the lower part of the room to the breathing area of the human body. When sitting, the inhaled air region distributes the lower region from the mouth as in the standing posture. When sleeping, the inhaled air region is distributed over the horizontal direction of the mouth near the floor.

Units: SI