Scaling of heated plane jets with moderate radiative heat transfer in coupled DNS
| Autor: | Axel Coussement, Rogerio R.G. Santos, Jan Mateu Armengol, Olivier Gicquel, Ronan Vicquelin |
|---|---|
| Přispěvatelé: | University of Campinas [Campinas] (UNICAMP), Laboratoire d'Énergétique Moléculaire et Macroscopique, Combustion (EM2C), Université Paris Saclay (COmUE)-Centre National de la Recherche Scientifique (CNRS)-CentraleSupélec, Ecole Polytechnique de Bruxelles, Université libre de Bruxelles (ULB), CAPES (Brazilian Federal Agency for Support and Evaluation of Graduate Education within the Ministry of Education of Brazil), Centrale Recherche S.A., CNRSCentre National de la Recherche Scientifique (CNRS), Region Ilede-FranceRegion Ile-de-France |
| Rok vydání: | 2019 |
| Předmět: |
Physique de l'état condense [struct. électronique
etc.] Materials science Direct numerical simulation Combustion 02 engineering and technology Physique de l'état condense [struct. propr. thermiques etc.] Sciences de l'ingénieur 7. Clean energy 01 natural sciences Scaling 010305 fluids & plasmas [SPI]Engineering Sciences [physics] Thermal radiation 0103 physical sciences Radiative transfer Chimie générale Physique de l'état condense [supraconducteur] Fluid Flow and Transfer Processes Jet (fluid) Direct Numerical Simulation Turbulence Mechanical Engineering Radiant energy Mechanics Mécanique appliquée spéciale 021001 nanoscience & nanotechnology Condensed Matter Physics Monte-Carlo method Monte-Carlo method 20 Mécanique sectorielle Turbulent jet Heat transfer 0210 nano-technology |
| Zdroj: | International Journal of Heat and Mass Transfer, 139 International Journal of Heat and Mass Transfer International Journal of Heat and Mass Transfer, Elsevier, 2019, 139, pp.456-474. ⟨10.1016/j.ijheatmasstransfer.2019.05.025⟩ |
| ISSN: | 0017-9310 |
| Popis: | The effects of thermal radiation in a heated jet of water vapor are studied with a direct numerical simulation coupled to a Monte-Carlo solver. The adequacy of the numerical setup is first demonstrated in the uncoupled isothermal and heated turbulent plane jets with comparisons to experimental and numerical data. Radiative energy transfer is then accounted for with spectral dependency of the radiative properties described by the Correlated-k (ck) method. Between the direct impact through modification of the temperature field by the additional radiative transfer and the indirect one where the varied flow density changes the turbulent mixing, the present study is able to clearly identify the second one in the jet developed region by considering conditions where effects of thermal radiation are moderate. When using standard jet scaling laws, the different studied cases without radiation and with small-to-moderate radiative heat transfer yield different profiles even when thermal radiation becomes locally negligible. By deriving another scaling law for the decay of the temperature profile, self-similarity is obtained for the different turbulent jets. The results of the study allow for distinguishing whether thermal radiation modifies the nature of heat transfer mechanisms in the jet developed region or not while removing the indirect effects of modified density. SCOPUS: ar.j info:eu-repo/semantics/published |
| Databáze: | OpenAIRE |
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