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http://dx.doi.org/10.5139/JKSAS.2020.48.2.135

A Level-set Parameterization for Any 3D Complex Interface Related to a Fire Spread in Building Structures  

Kim, Hyun-Jun (Korea Aerospace Research Institute)
Cho, Soo-Yeong (Department of Mechanical and Aerospace Engineering, Seoul National University)
Lee, Young-hun (Department of Mechanical and Aerospace Engineering, Seoul National University)
Yoh, Jai-ick (Department of Mechanical and Aerospace Engineering, Seoul National University)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.48, no.2, 2020 , pp. 135-146 More about this Journal
Abstract
To define an interface in a conventional level-set method, an analytical function must be revealed for an interfacial geometry. However, it is not always possible to define a functional form of level sets when interfaces become complex in a Cartesian coordinate system. To overcome this difficulty, we have developed a new level-set formalism that discriminates the interior from the exterior of a CAD modeled interface by parameterizing the stereolithography (STL) file format. The work outlined here confirms the accuracy and scalability of the hydrodynamic reactive solver that utilizes the new level set concept through a series of tests. In particular, the complex interaction between shock and geometrical confinements towards deflagration-to-detonation transition is numerically investigated. Also, a process of flame spreading and damages caused by point source detonation in a real-sized plant facility have been simulated to confirm the validity of the new method built for reactive hydrodynamic simulation in any complex three-dimensional geometries.
Keywords
Level-set; Stereolithography Format; Rate Stick Test; Flame Acceleration; Detonation; Flame Spread;
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