Lattice Boltzmann Methods for Fluid Structure Interaction
Blair, Stuart R.
Kwon, Young W.
MetadataShow full item record
The use of lattice Boltzmann methods (LBM) for fluid flow and its coupling with finite element method (FEM) structural models for fluid-structure interaction (FSI) is investigated. A body of high performance LBM software that exploits graphic processing unit (GPU) and multiprocessor programming models is developed and validated against a set of two- and three-dimensional benchmark problems. Computational performance is shown to exceed recently reported results for single-workstation implementations over a range of problem sizes. A mixed-precision LBM collision algorithm is presented that retains the accuracy of double-precision calculations with less computational cost than a full double-precision implementation. FSI modelling methodology and example applications are presented along with a novel heterogeneous parallel implementation that exploits task-level parallelism and workload sharing between the central processing unit (CPU) and GPU that allows significant speedup over other methods. Multi-component LBM fluid models are explicated and simple immiscible multi-component fluid flows in two-dimensions are presented. These multi-component fluid LBM models are also paired with structural dynamics solvers for two-dimensional FSI simulations. To enhance modeling capability for domains with complex surfaces, a novel coupling method is introduced that allows use of both classical LBM (CLBM) and a finite element LBM (FELBM) to be combined into a hybrid LBM that exploits the flexibility of FELBM while retaining the efficiency of CLBM.
Approved for public release; distribution is unlimited
Showing items related by title, author, creator and subject.
Gorman, Howard Paul (Monterey, California. Naval Postgraduate School, 1978-09);The theoretical background of the Navy's inventory models is presented and the problems inherent in the models are discussed. The four principal Navy inventory models are described and evaluated, i.e., the Uniform Inventory ...
Meier, Joseph D. (Cambridge, Massachussetts, Massachussetts Institute of Technology, 2013-06);A three-phased study of the material properties and post-impact behavior of prismatic pouch lithium-ion battery cells was conducted to refine computational finite element models and explore the mechanisms of thermal runaway ...
Taylor, Ian (Monterey, California: Naval Postgraduate School, 2017-09);This research presents the first accurate three and six Degree of Freedom (DOF) models of the small diameter REMUS 100 with cross-tunnel thrusters (CTT). These are the first known hydrodynamic models to explicitly consider ...