Turbulent momentum and passive scalar transport in supersonic channel flow



Título del documento: Turbulent momentum and passive scalar transport in supersonic channel flow
Revista: Journal of the Brazilian Society of Mechanical Sciences and Engineering
Base de datos: PERIÓDICA
Número de sistema: 000312371
ISSN: 1678-5878
Autores: 1
1
Instituciones: 1Technische Universitat Munchen, Garching, Bayern. Alemania
Año:
Periodo: Abr-Jun
Volumen: 28
Número: 2
Paginación: 174-185
País: Brasil
Idioma: Inglés
Tipo de documento: Artículo
Enfoque: Experimental
Resumen en inglés Direct numerical simulations of compressible turbulent channel flow including passive scalar transport have been performed at five Mach numbers, M, ranging from 0.3 to 3.5 and Reynolds numbers, Re, ranging from 181 to 1030. The Prandtl and Schmidt numbers are 0.7 and 1.0, respectively, in all cases. The passive scalar is added to the flow through one channel wall and removed through the other, leading to an S-shaped mean scalar profile with non-zero gradient in the channel centre. The paper describes the set of compressible flow equations, which is integrated using high-order numerical schemes in space and time. Statistical equations are presented for fully developed flow, including budgets for the Reynolds stresses, the turbulent scalar fluxes and the scalar variance. Results are presented for second order moments and the terms in the mentioned balance equations. Outer scalings are found suitable to collapse incompressible and compressible data. The reduction in the near-wall pressure-strain and pressure-scalar gradient correlations due to compressibility is explained using a Green-function-based analysis of the fluctuating pressure field
Disciplinas: Ingeniería,
Física y astronomía,
Matemáticas
Palabras clave: Ingeniería mecánica,
Física,
Turbulencia,
Flujos,
Presión,
Compresión,
Simulación numérica,
Escalamiento
Keyword: Engineering,
Physics and astronomy,
Mathematics,
Mechanical engineering,
Physics,
Numerical simulation,
Compression,
Flow,
Scaling,
Pressure,
Turbulence
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