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11:00
15 mins
DIRECT NUMERICAL SIMULATIONS OF TURBULENT FLOW THROUGH POROUS CHANNELS AND DUCTS
Arghya Samanta, Ricardo Vinuesa, Iman Lashgari, Philipp Schlatter, Luca Brandt
Session: Geophysical and astrophysical turbulence 1
Session starts: Thursday 27 August, 10:30
Presentation starts: 11:00
Room: Room C
Arghya Samanta (KTH Mechanics)
Ricardo Vinuesa (KTH Mechanics)
Iman Lashgari (KTH Mechanics)
Philipp Schlatter (KTH Mechanics)
Luca Brandt (KTH Mechanics)
Abstract:
Direct numerical simulations of the fully developed turbulent flow through a porous channel and duct are performed based on the spectral element code Nek5000. The volume-averaged Navier-Stokes (VANS) equations are implemented in order to describe the flow in the composite medium. The numerical simulations of the VANS equations are carried out at a constant value of the bulk Reynolds number when the porosity, or equivalently, the permeability of the medium varies successively. The mean and turbulent
energy budgets are computed and the effect of porosity on the secondary flow in a duct is examined.