Large Eddy Simulation with SPH

Researcher: Arno Mayrhofer

Supervisor(s): Prof. D. Laurence, Dr. B. Rogers, D. Violeau
Sponsor: EDF R&D
Start Date: November 2010 End Date: October 2013
Keywords: Smoothed Particle Hydrodynamics, Large Eddy Simulation

Overall Research Aim

Smoothed Particle Hydrodynamics (SPH) has now been in development for more than 30 years. Although it only gained increased interest in the computational fluid dynamics area during the last 15 years considerable progress has been made since then. Amongst others a group named SPHERIC was formed to combine the efforts of researchers around the world. Members of this Group have also created an open-source SPH code called SPHysics.

The most attractive feature of SPH is its simplicity. This is especially true when it comes to dealing with violent free-surface flows which can be very difficult to simulate with traditional grid based methods. In recent years SPH has become a robust solver for the Navier Stokes Equations, yet the work done on turbulence is scarce.

The main goal of this particular thesis is to run various Large Eddy Simulations with SPH. Both of these tools require extensive computational resources, especially when doing 3D Simulations. With the computational facilities of EDF and the use of the 3D parallel SPH code SPARTACUS we plan on simulating the following test cases:
  • Decay of Isotropic Turbulence
  • Periodic Open Channel Flow
  • Hydraulic Jump
  • Fish Pass
Specific emphasis will be placed on the type of LES model as well as possible wall functions.


Before doing the above mentioned 3D simulation two test cases will be studied extensively. Namely the standing wave as well as the linear wave channel. They will be utilized to extend the boundary treatment by M. Ferrand and study the numerical energy conservation and amplitude behaviour of said problems.

An additional goal of this thesis is to enlarge the knowledge about theoretical properties of the SPH method by means of analysis. Specific fields include
  • Von Neumann analysis of the present SPH formulation.
  • Conservation properties of symplectic time schemes considering the continuity equation.

Research Progress

As this PhD started only recently no significant and non-preliminary results could be produced yet.



Last Modification: r4 - 2011-01-05 - 14:24:40 - DominiqueLaurence


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Topic revision: r4 - 2011-01-05 - 14:24:40 - DominiqueLaurence
 

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