Abstract
The Smoothed Particle Hydrodynamics method withthe unified semi-analytical wall boundary conditions is tested inDirect Numerical Simulation (DNS) mode against well establishedspectral code reference results. In order to achieve this severalprerequisites are introduced. This includes a novel method ofinitializing the kernel wall correction factor in 3-D as well as alimiter for the imposition of a variable driving force based on afixed volume flux.These tools are then applied to a turbulent channel flow with aminimum size. This test case reduces the computational demandwhile still sustaining turbulence and capturing all the flowphysics. The influence of the volume diffusion term on theturbulence is studied in detail, indicating a specific choice forthe associated constant. The second, finer resolution, SPH DNSresults are in fairly good agreement with the reference spectralsimulation DNS results as well as experimental data in terms offirst and second moments. Additionally, some preliminary resultsare presented showing Lagrangian statistics of the DNS.
| Original language | English |
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| Title of host publication | Prooceedings of the 8th International SPHERIC Workshop |
| Editors | Jan Erik Olsen |
| Pages | 130-138 |
| Number of pages | 9 |
| Publication status | Published - 4 Jun 2013 |
| Event | 8th International SPHERIC Workshop - Trondheim Duration: 4 Jun 2013 → 6 Jun 2013 |
Conference
| Conference | 8th International SPHERIC Workshop |
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| City | Trondheim |
| Period | 4/06/13 → 6/06/13 |
Keywords
- Direct numerical simulation
- Turbulent channel flow
- Smoothed particle hydrodynamics