VOF Modelling of Splash and Gas Plumes
The Volume of Fluid (VOF) method is a versatile method for the mathematical modelling of multi-fluid problems. In recent years, developments in linear algebra solvers and interface tracking has enabled the VOF method to tackle complex multi-fluid problems with enhanced accuracy. VOF codes have traditionally been written for single processors as it is difficult to distribute the interface reconstruction workload between processor efficiently. This project will develop efficient methods to carry out distribution of the workload for interface reconstruction between processors for a 3-D VOF code. The code will the be used to study a number of different physical processes; (i) evolution of splash from an impinging liquid drop to provide insight into the physics of cavity collapse and splash initiation, (ii) turbulence in the injection of gases into a liquid bath, and (iii) the formation of drops and bubbles in microchannels.
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Principal Investigator Jong LiowMechanical Engineering James Cook University |
Project e30 |
RFCD Codes 291801
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Significant Achievements, Anticipated Outcomes and Future Work
The work for 2005 has been slowed by lack of human resources. A paper was submitted and accepted for publication. Rewriting of the code has been slow and is currently done on a workstation at JCU and is unfinished, hence the lack of parallel runtime on the APAC machine. The code is being upgraded to include complex geometries and variable mesh spacing.
Data Sources, Curation Techniques, Data Access Policy and Method
Nil- all results downloaded back to JCU for analysis.
Computational Techniques Used
The program solves the Navier Stokes equations for multiple phases using a Volume of Fluid (VOF) code. The VOF code incorporates an interface tracking and reconstruction algorithm so that the actual positions of the fluid interfaces are conserved. This allows fluid fragmentation, bubble formation and multiphase flows to be modelled without averaging quantities. A GMRES Krylov subspace preconditioning method with multigrid is used for the Poisson equation and is designed specially to be stable and robust for large density differences (1:10000).
Publications, Awards and External Funding
External Funding and Awards
None.
Publications
Liovic, P., Rudman, M., Liow, J. L., Lakehal, D. and Kothe, D. 2006 A 3D unsplit advection volume tracking with planarity-preserving interface reconstruction. Computers and Fluids doi:10.1016/j.compfluid.2005.09.003.