Verification and validation of computational fluid dynamics simulations of compound channel flow

M. S. Filonovich; R. Azevedo; Luis Rojas; J. B. Leal

Verification and validation of computational fluid dynamics simulations of compound channel flow

M. S. Filonovich, R. Azevedo, Luis Rojas, J. B. Leal

Department of Mechanical and Aerospace Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

In this study the verification and validation of a 2^nd order turbulence closure model is performed for an experimental compound channel flow, where the velocity field was measured by a Laser Doppler Velocimeter. Detailed Explicit Algebraic Reynolds Stress Model (EARSM) simulation is reported. The Grid Convergence Index (GCI) approach proposed by Roache (1998) was adopted to evaluate the uncertainty associated to grid resolution. The velocity components, the turbulent kinetic energy (TKE) and the dissipation rate were used as variables of interest. The GCI results present low values for the streamwise velocity, TKE and dissipation rate, but higher values in what concerns vertical and spanwise velocities. This indicates that the mean primary flow has converged but the secondary flow field still depends on grid resolution. Based on GCI values distribution, the mesh was locally refined. Comparison of numerical and experimental results shows good agreement.

Original language	English
Title of host publication	34th IAHR Congress 2011 - Balance and Uncertainty
Subtitle of host publication	Water in a Changing World, Incorporating the 33rd Hydrology and Water Resources Symposium and the 10th Conference on Hydraulics in Water Engineering
Publisher	International Association for Hydro-Environment Engineering and Research (IAHR)
Pages	4430-4437
Number of pages	8
ISBN (Electronic)	9780858258686
Publication status	Published - Jan 1 2011
Event	34th IAHR Congress 2011 - Balance and Uncertainty: Water in a Changing World, Incorporating the 33rd Hydrology and Water Resources Symposium and the 10th Conference on Hydraulics in Water Engineering - Brisbane, Australia Duration: Jun 26 2011 → Jul 1 2011

Publication series

Name	34th IAHR Congress 2011 - Balance and Uncertainty: Water in a Changing World, Incorporating the 33rd Hydrology and Water Resources Symposium and the 10th Conference on Hydraulics in Water Engineering

Conference

Conference	34th IAHR Congress 2011 - Balance and Uncertainty: Water in a Changing World, Incorporating the 33rd Hydrology and Water Resources Symposium and the 10th Conference on Hydraulics in Water Engineering
Country	Australia
City	Brisbane
Period	6/26/11 → 7/1/11

Keywords

CFD
Compound channel
EARSM
GCI
Validation
Verification

ASJC Scopus subject areas

Engineering (miscellaneous)
Water Science and Technology
Environmental Science (miscellaneous)

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Filonovich, M. S., Azevedo, R., Rojas, L., & Leal, J. B. (2011). Verification and validation of computational fluid dynamics simulations of compound channel flow. In 34th IAHR Congress 2011 - Balance and Uncertainty: Water in a Changing World, Incorporating the 33rd Hydrology and Water Resources Symposium and the 10th Conference on Hydraulics in Water Engineering (pp. 4430-4437). (34th IAHR Congress 2011 - Balance and Uncertainty: Water in a Changing World, Incorporating the 33rd Hydrology and Water Resources Symposium and the 10th Conference on Hydraulics in Water Engineering). International Association for Hydro-Environment Engineering and Research (IAHR).

Verification and validation of computational fluid dynamics simulations of compound channel flow. / Filonovich, M. S.; Azevedo, R.; Rojas, Luis; Leal, J. B.

34th IAHR Congress 2011 - Balance and Uncertainty: Water in a Changing World, Incorporating the 33rd Hydrology and Water Resources Symposium and the 10th Conference on Hydraulics in Water Engineering. International Association for Hydro-Environment Engineering and Research (IAHR), 2011. p. 4430-4437 (34th IAHR Congress 2011 - Balance and Uncertainty: Water in a Changing World, Incorporating the 33rd Hydrology and Water Resources Symposium and the 10th Conference on Hydraulics in Water Engineering).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Filonovich, MS, Azevedo, R, Rojas, L & Leal, JB 2011, Verification and validation of computational fluid dynamics simulations of compound channel flow. in 34th IAHR Congress 2011 - Balance and Uncertainty: Water in a Changing World, Incorporating the 33rd Hydrology and Water Resources Symposium and the 10th Conference on Hydraulics in Water Engineering. 34th IAHR Congress 2011 - Balance and Uncertainty: Water in a Changing World, Incorporating the 33rd Hydrology and Water Resources Symposium and the 10th Conference on Hydraulics in Water Engineering, International Association for Hydro-Environment Engineering and Research (IAHR), pp. 4430-4437, 34th IAHR Congress 2011 - Balance and Uncertainty: Water in a Changing World, Incorporating the 33rd Hydrology and Water Resources Symposium and the 10th Conference on Hydraulics in Water Engineering, Brisbane, Australia, 6/26/11.

Filonovich MS, Azevedo R, Rojas L, Leal JB. Verification and validation of computational fluid dynamics simulations of compound channel flow. In 34th IAHR Congress 2011 - Balance and Uncertainty: Water in a Changing World, Incorporating the 33rd Hydrology and Water Resources Symposium and the 10th Conference on Hydraulics in Water Engineering. International Association for Hydro-Environment Engineering and Research (IAHR). 2011. p. 4430-4437. (34th IAHR Congress 2011 - Balance and Uncertainty: Water in a Changing World, Incorporating the 33rd Hydrology and Water Resources Symposium and the 10th Conference on Hydraulics in Water Engineering).

Filonovich, M. S. ; Azevedo, R. ; Rojas, Luis ; Leal, J. B. / Verification and validation of computational fluid dynamics simulations of compound channel flow. 34th IAHR Congress 2011 - Balance and Uncertainty: Water in a Changing World, Incorporating the 33rd Hydrology and Water Resources Symposium and the 10th Conference on Hydraulics in Water Engineering. International Association for Hydro-Environment Engineering and Research (IAHR), 2011. pp. 4430-4437 (34th IAHR Congress 2011 - Balance and Uncertainty: Water in a Changing World, Incorporating the 33rd Hydrology and Water Resources Symposium and the 10th Conference on Hydraulics in Water Engineering).

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abstract = "In this study the verification and validation of a 2nd order turbulence closure model is performed for an experimental compound channel flow, where the velocity field was measured by a Laser Doppler Velocimeter. Detailed Explicit Algebraic Reynolds Stress Model (EARSM) simulation is reported. The Grid Convergence Index (GCI) approach proposed by Roache (1998) was adopted to evaluate the uncertainty associated to grid resolution. The velocity components, the turbulent kinetic energy (TKE) and the dissipation rate were used as variables of interest. The GCI results present low values for the streamwise velocity, TKE and dissipation rate, but higher values in what concerns vertical and spanwise velocities. This indicates that the mean primary flow has converged but the secondary flow field still depends on grid resolution. Based on GCI values distribution, the mesh was locally refined. Comparison of numerical and experimental results shows good agreement.",

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