Large eddy simulation of Rayleigh-Taylor instability using the arbitrary Lagrangian-Eulerian method [report]

Rebecca Mattson Darlington
1999 unpublished
This research addresses the application of a large eddy simulation (LES) to Arbitrary Lagrangian Eulerian (ALE) simulations of Rayleigh-Taylor instability. -First, ALE simulations of simplified Rayleigh-Taylor instability are studied. The advantages of ALE over Eulerian simulations are shown. Next, the behavior of the LES is examined in a more complicated ALE simulation of Rayleigh-Taylor instability. The effects of eddy viscosity and stochastic backscatter are examined. The LES is also coupled
more » ... LES is also coupled with ALE to increase grid resolution in areas where it is needed. Finally, the methods studied above are applied to two sets of experimental simulations. In these simulations, ALE allows the mesh to follow expanding experimental targets, while LES can be used to mimic the effect of unresolved instability modes. ii Acknowledgments I wish to thank the many people who made this,dissertation possible. First of all, I would like to thank my two thesis advisors: Dr. Tom McAbee for the thesis project idea and guidance in how to accomplish it, and Dr. Garry Rodrigue for assistance with the computational details of the project and writing. Without the continual advice of both my advisors, I would never have accomplished this work.
doi:10.2172/15013106 fatcat:qoi5rom76bfjnghtwoyryydfya