Uncertainty-based Mathematical Methods for Simulating Confined, Unsteady Flow Dynamics with Particle Entrainment
Abstract
The objective of the proposed work is to address the critical need for a novel hierarchical multiscale method in complex multiphase flows including unsteady particle-laden turbulence in confined environments. Foundational research leading to new mathematical methods will be performed at the relevant scales to advance the understanding of the physics and continuum flow models to develop a next generation high fidelity robust modeling framework for complex heterophase turbulent flow analysis. The framework will establish boundary slip techniques to address crucial challenges in moving contact line (MCL) problems and non-Newtonian particle deposition methods in near-wall non-Kolmogorov turbulence. The established techniques will be rigorously validated with molecular dynamics (MD) simulations and experimental data available from studies by others of high-temperature sessile drops unit case and particulate deposition. The analysis will be extended to mesoscale continuum models including novel descriptions for non-Kolmogorov near-wall turbulent flows, Johnson-Cook parameters addressing particle-particle adhesion-deformation, non-local Brownian dynamics for nanoscale particles, and generalized deposition for particle-wall interaction modeling. Novel coupling strategies will be proposed and implemented to obtain a multiscale modeling framework by integrating mesoscale and macroscale dynamics and bridging the essential physics. The multiscale framework will be validated, and a detailed uncertainty-based analysis will be performed across the scales to uncover major parameter sensitivities and their propagation through the critical metrics. The multiscale multiphysics model developed herein will lead to new discoveries as well as accurate and physically consistent resolution of fundamental phenomena including Huh-Scriben Paradox, tribo-electric charging, Kopp-Etchellis effect in high-speed stochastic turbulent multiphase flows. The scope of this work is considerable and has the long term potential of benefiting academic researchers, industrial sectors and government agencies in a wide range of applications involving particle-laden turbulent flows.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Apr 08, 2019
- Source ID
- W911NF1910225
Entities
People
- Alison B. Flatau
Organizations
- Army Contracting Command
- United States Army
- University of Maryland