TY - GEN
T1 - Relevance of approximate deconvolution for one-way coupled motion of inertial particles in LES of turbulent channel flow
AU - Jaszczur, Marek
AU - Geurts, Bernard J.
AU - Kuerten, J.G.M.
PY - 2011/1/1
Y1 - 2011/1/1
N2 - The Euler-Lagrange approach, based on Direct Numerical Simulation (DNS) and Large-Eddy Simulation (LES) for the fluid, is applied to particle-laden turbulent flow in a channel. Explicit subgrid modeling of the turbulent stresses is adopted, while the particle motion includes small turbulent scales based on approximate deconvolution of the LES field. Results for turbulent flow in a channel at Reτ = 150 are discussed, focusing on one-way coupled point-particle statistics at three Stokes numbers. DNS provides a point of reference for assessing LES with different sub-filter eddy-viscosity models: Smagorinsky, Van Driest- Smagorinsky and the dynamic model are studied. Clustering and segregation of particles near the wall, due to turbophoresis, is strongly related to the quality of the LES velocity field and the approximate reconstruction of the smaller resolved scales. It is shown that deconvolution up to second order allows to better describe the particle statistics near a solid wall; deconvolution at higher order yields rather marginal additional improvements.
AB - The Euler-Lagrange approach, based on Direct Numerical Simulation (DNS) and Large-Eddy Simulation (LES) for the fluid, is applied to particle-laden turbulent flow in a channel. Explicit subgrid modeling of the turbulent stresses is adopted, while the particle motion includes small turbulent scales based on approximate deconvolution of the LES field. Results for turbulent flow in a channel at Reτ = 150 are discussed, focusing on one-way coupled point-particle statistics at three Stokes numbers. DNS provides a point of reference for assessing LES with different sub-filter eddy-viscosity models: Smagorinsky, Van Driest- Smagorinsky and the dynamic model are studied. Clustering and segregation of particles near the wall, due to turbophoresis, is strongly related to the quality of the LES velocity field and the approximate reconstruction of the smaller resolved scales. It is shown that deconvolution up to second order allows to better describe the particle statistics near a solid wall; deconvolution at higher order yields rather marginal additional improvements.
KW - Approximate deconvolution
KW - Direct Numerical Simulation
KW - Large-eddy simulation
KW - Multiphase flow
UR - https://www.scopus.com/pages/publications/84964826311
U2 - 10.1007/978-94-007-0231-8_17
DO - 10.1007/978-94-007-0231-8_17
M3 - Conference contribution
AN - SCOPUS:84964826311
SN - 9789400702301
T3 - ERCOFTAC Series
SP - 181
EP - 190
BT - Quality and Reliability of Large-Eddy Simulations II
PB - Springer
T2 - 2nd Workshop on Quality and Reliability of Large-Eddy Simulations, QLES 2009
Y2 - 9 September 2009 through 11 September 2009
ER -