3 research outputs found
A Review on Contact and Collision Methods for Multi-body Hydrodynamic problems in Complex Flows
Modeling and direct numerical simulation of particle-laden flows have a
tremendous variety of applications in science and engineering across a vast
spectrum of scales from pollution dispersion in the atmosphere, to fluidization
in the combustion process, to aerosol deposition in spray medication, along
with many others. Due to their strongly nonlinear and multiscale nature, the
above complex phenomena still raise a very steep challenge to the most
computational methods. In this review, we provide comprehensive coverage of
multibody hydrodynamic (MBH) problems focusing on particulate suspensions in
complex fluidic systems that have been simulated using hybrid
Eulerian-Lagrangian particulate flow models. Among these hybrid models, the
Immersed Boundary-Lattice Boltzmann Method (IB-LBM) provides mathematically
simple and computationally-efficient algorithms for solid-fluid hydrodynamic
interactions in MBH simulations. This paper elaborates on the mathematical
framework, applicability, and limitations of various 'simple to complex'
representations of close-contact interparticle interactions and collision
methods, including short-range inter-particle and particle-wall steric
interactions, spring and lubrication forces, normal and oblique collisions, and
mesoscale molecular models for deformable particle collisions based on
hard-sphere and soft-sphere models in MBH models to simulate settling or flow
of nonuniform particles of different geometric shapes and sizes in diverse
fluidic systems.Comment: 37 pages, 12 Figure
Proceedings of the NASA Conference on Space Telerobotics, volume 4
Papers presented at the NASA Conference on Space Telerobotics are compiled. The theme of the conference was man-machine collaboration in space. The conference provided a forum for researchers and engineers to exchange ideas on the research and development required for the application of telerobotic technology to the space systems planned for the 1990's and beyond. Volume 4 contains papers related to the following subject areas: manipulator control; telemanipulation; flight experiments (systems and simulators); sensor-based planning; robot kinematics, dynamics, and control; robot task planning and assembly; and research activities at the NASA Langley Research Center