Presentation Information
[A-18-01]Investigation of a CO Concentration Visualization Method for Hazardous Area Experiences in a VR Environment Using FDS Fire Simulation
◎△Katsuki Sakurai1, Akihito Kohiga1, Takahiro Koita2 (1. Doshisha Univ., 2. Graduate School of Doshisha Univ.)
Keywords:
Carbon Monoxide,Fire Simulation,Virtual Reality Visualization,Convex Hull Interpolation
Carbon monoxide (CO) generated during fires is colorless and odorless, making it difficult to detect, while even short-term exposure can have serious effects on human health. Previous studies have proposed a method for visualizing hazardous CO regions in a virtual reality (VR) environment by extracting high-concentration regions from Fire Dynamics Simulator (FDS) results and generating their outer shapes using convex hulls. However, because the simulation results are output at one-second intervals, the boundaries of hazardous regions change discontinuously over time. To address this issue, this study proposes a convex hull interpolation method for generating smooth temporal transitions between successive shapes. The proposed method uses reference directions distributed on a Fibonacci sphere to unify the number of convex hull vertices at each time step and establishes vertex correspondences based on their directions. Intermediate shapes are then generated through linear interpolation between corresponding vertices. As a result, the temporal changes in hazardous regions can be represented more smoothly, enabling continuous observation of their expansion and movement processes.