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Sedimentation of la...
Sedimentation of large particles in turbulent environments
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- Fornari, Walter, 1989- (författare)
- KTH,Linné Flow Center, FLOW,SeRC - Swedish e-Science Research Centre,Mekanik
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Francesco, P. (författare)
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- Brandt, Luca (författare)
- KTH,Linné Flow Center, FLOW,SeRC - Swedish e-Science Research Centre,Mekanik
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(creator_code:org_t)
- TU Delft, 2015
- 2015
- Engelska.
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Ingår i: Proceedings - 15th European Turbulence Conference, ETC 2015. - : TU Delft.
- Relaterad länk:
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https://urn.kb.se/re...
Abstract
Ämnesord
Stäng
- The aim of the present study is to investigate the sedimentation of large non-colloidal spherical particles in both quiescent and turbulent environments. To this aim, Direct Numerical Simulations are performed using an Immersed Boundary Method to account for the dispersed phase. The solid volume fractions considered are in the range φ = 0.005−0.010, while the solid to fluid density ratio ρp/ρf is set equal to 1.02. The particle diameter is chosen to be approximately 12 Komlogorov lengthscales in nominal conditions. The results show that the mean settling velocities Vt decrease in the turbulent cases. The overall drag is increased both by the non-linear finite Reynolds number behavior and by unsteady effects, which are negligible in quiescent cases.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering (hsv//eng)
Nyckelord
- Numerical methods
- Reynolds number
- Turbulence
- Turbulent flow
- Finite Reynolds number
- Immersed boundary methods
- Particle diameters
- Settling velocity
- Solid volume fraction
- Spherical particle
- Turbulent environments
- Unsteady effects
- Sols
Publikations- och innehållstyp
- ref (ämneskategori)
- kon (ämneskategori)