DNS/LES Studies of Turbulent Flows Based on the Cumulant Lattice Boltzmann Approach

Manfred Krafczyk (), Kostyantyn Kucher, Ying Wang and Martin Geier
Additional contact information
Manfred Krafczyk: TU Braunschweig, Institute for Computational Modeling in Civil Engineering
Kostyantyn Kucher: TU Braunschweig, Institute for Computational Modeling in Civil Engineering
Ying Wang: TU Braunschweig, Institute for Computational Modeling in Civil Engineering
Martin Geier: TU Braunschweig, Institute for Computational Modeling in Civil Engineering

A chapter in High Performance Computing in Science and Engineering ‘14, 2015, pp 519-531 from Springer

Abstract: Abstract In many industrial and environmental problems we encounter turbulent flows over porous surfaces which also penetrate the porous medium to different extents. Although there is a wealth of literature on macroscopic models of such phenomena which do not take the pore scale explicitly into account, these approaches typically require some additional transport coefficients to match experimentally obtained statistics for mass, momentum and energy transport across such interfaces. In this project we conduct Direct Navier-Stokes (DNS) and Large Eddy Simulation (LES) computations of turbulent flows which explicitly take into account specific pore scale geometries obtained from computer tomography imaging and do not use any explicit turbulence modeling. In this first part of the project we conducted validation studies for two canonical turbulent flows, i.e. flow around a plate and flow in a porous channel. Subsequently, we compare simulation results of turbulent flows over a porous sand and to experimental results and demonstrate the validity of our approach. Finally we discuss our approach to address evaporation processes on a pore scale which is based on a separation of time-scales. The newly developed cumulant Lattice Boltzmann scheme implemented as part of our research Code VirtualFluids shows a favorable behavior with respect to parallelization efficiency as well as to numerical stability and accuracy.

Keywords: Large Eddy Simulation; Turbulent Boundary Layer; Observable Quantity; Lattice Boltzmann Equation; Target Equation (search for similar items in EconPapers)
Date: 2015
References: Add references at CitEc
Citations:

There are no downloads for this item, see the EconPapers FAQ for hints about obtaining it.

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:spr:sprchp:978-3-319-10810-0_34

Ordering information: This item can be ordered from
http://www.springer.com/9783319108100

DOI: 10.1007/978-3-319-10810-0_34

Access Statistics for this chapter

More chapters in Springer Books from Springer
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().