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Simulating Nonequilibrium Radiation via Orthogonal Polynomial Refinement
Final rept. 7 Jan 2012-30 Nov 2014
WRIGHT STATE UNIV DAYTON OH DEPT OF MECHANICAL AND MATERIALS ENGINEERING
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The complex nonequilibrium radiative simulation for high-speed flow is built on the interlocking phenomena between quantum physics, aerodynamics with nonequilibrium chemical reaction, and radiation transfer. All dominant chemical-physical phenomena are occurred at the molecularatomic scales and all radiative energy transfers are also taken place at the quantum transitions of internal degrees of freedom by molecules or atoms, thus the phenomenon must be modeled. In addition, the chemical species concentrations and its associated thermodynamic states of an in homogeneous flowing medium are solved on a coordinate system according to the flowfield structure. On the other hand, the radiation energy transmission follows the line-of-the-sight path of electromagnetic waves. Therefore, two intrinsically different coordinates are required to simulate simultaneously the multi-disciplinary phenomenon. Meanwhile the spectral properties such as the emission and absorption are exclusively tied to the local thermodynamic state and compositions of the flow medium. The required optical parameters for the nonequilibrium phenomena simulation need to be determined from data bases which are derived from quantum physics and transmit across the two different coordinates by a nearest neighbor search algorithm.
APPROVED FOR PUBLIC RELEASE