Reduced Order Models for conduction and radiation inside semi-transparent media via the Modal Identification Method
| Autor: | Didier Saury, Yang Liu, Manuel Girault, Yann Billaud, Denis Lemonnier, Adel M. Benselama |
|---|---|
| Přispěvatelé: | Institut Pprime (PPRIME), ENSMA-Centre National de la Recherche Scientifique (CNRS)-Université de Poitiers, Sino-European Institute of Aviation Engineering, Civil Aviation University of China (CAUC) |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
conduction
Rotational symmetry 02 engineering and technology 01 natural sciences 010305 fluids & plasmas [SPI]Engineering Sciences [physics] Thermal conductivity 0103 physical sciences Radiative transfer Reference model Fluid Flow and Transfer Processes Physics semi-transparent medium particle swarm optimization Mechanical Engineering Mathematical analysis Particle swarm optimization 021001 nanoscience & nanotechnology Condensed Matter Physics Thermal conduction low order model radiation Nonlinear system Attenuation coefficient [SPI.MECA.THER]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Thermics [physics.class-ph] P1 approximation 0210 nano-technology |
| Zdroj: | International Journal of Heat and Mass Transfer International Journal of Heat and Mass Transfer, Elsevier, 2021, 168, ⟨10.1016/j.ijheatmasstransfer.2020.120598⟩ |
| ISSN: | 0017-9310 |
| DOI: | 10.1016/j.ijheatmasstransfer.2020.120598⟩ |
| Popis: | International audience; In the frame of characterization of thermophysical properties of semi-transparent gray media for which radiative transfers can be modelled by P1 approximation, the present study deals with development, construction and validation of conducto-radiative linear reduced order models (ROMs) explicitly parametrized by thermal conductivity and effective absorption coefficient. As variations of temperature are assumed to be limited in magnitude (about a few tenths of K) in the considered applications, the radiative contribution is linearized in the ROM formulation. ROMs are built through the Modal Identification Method (MIM): once their general form has been derived, they are identified using Particle Swarm Optimization and Ordinary Least Squares, from simulations coming from a nonlinear reference model. In the presented application, the latter is a two-dimensional axisymmetric unsteady model designed to model a "flash-type" experiment. The chosen range of values for thermal conductivity and effective absorption coefficient includes the values usually found for polymethyl methacrylate (PMMA). In comparison with the reference model, the computing time is considerably reduced with limited loss of accuracy. |
| Databáze: | OpenAIRE |
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