A review of domain decomposition methods for simulation of fluid flows: concepts, algorithms, and applications
Abstract Domain decomposition (DD) is a powerful approach to numerically solve partial
differential equations, and it has become popular and indispensable in simulations of fluid …
differential equations, and it has become popular and indispensable in simulations of fluid …
Particle-scale computational approaches to model dry and saturated granular flows of non-Brownian, non-cohesive, and non-spherical rigid bodies
A Wachs - Acta Mechanica, 2019 - Springer
We discuss methods to compute the flow of non-Brownian, non-cohesive, and non-spherical
rigid bodies immersed in a single homogeneous fluid. We address both the case of …
rigid bodies immersed in a single homogeneous fluid. We address both the case of …
Grains3D, a flexible DEM approach for particles of arbitrary convex shape—Part I: Numerical model and validations
We suggest a novel variant of Discrete Element Method (DEM) to simulate the flow dynamics
of granular material made of non-spherical particles. Our approach is limited to particles of …
of granular material made of non-spherical particles. Our approach is limited to particles of …
Microstructure-informed probability-driven point-particle model for hydrodynamic forces and torques in particle-laden flows
A Seyed-Ahmadi, A Wachs - Journal of Fluid Mechanics, 2020 - cambridge.org
We present a novel deterministic model that is capable of predicting particle-to-particle force
and torque fluctuations in a fixed bed of randomly distributed monodisperse spheres. First …
and torque fluctuations in a fixed bed of randomly distributed monodisperse spheres. First …
Collapse dynamics and runout of dense granular materials in a fluid
We investigate the effect of an ambient fluid on the dynamics of collapse and spread of a
granular column simulated by means of the contact dynamics method interfaced with …
granular column simulated by means of the contact dynamics method interfaced with …
High fidelity adaptive Cartesian octree grid computations of the flow past a Platonic polyhedron up to a Reynolds number of 200
We use a high fidelity non-boundary fitted Distributed Lagrange Multiplier/Fictitious Domain
method implemented on an adaptive Cartesian octree grid to investigate the unbounded …
method implemented on an adaptive Cartesian octree grid to investigate the unbounded …
Computational modeling of multiphase viscoelastic and elastoviscoplastic flows
In this paper, a three‐dimensional numerical solver is developed for suspensions of rigid
and soft particles and droplets in viscoelastic and elastoviscoplastic (EVP) fluids. The …
and soft particles and droplets in viscoelastic and elastoviscoplastic (EVP) fluids. The …
Dynamics, wakes, and regime transitions of a fixed angular particle in an unbounded inertial flow. I. Regular tetrahedron angular position
We investigate the unbounded inertial flow of a Newtonian fluid past a fixed regular
tetrahedron, the Platonic polyhedron with the lowest sphericity, in the range of Reynolds …
tetrahedron, the Platonic polyhedron with the lowest sphericity, in the range of Reynolds …
Accuracy of finite volume/staggered grid distributed Lagrange multiplier/fictitious domain simulations of particulate flows
Abstract Our Distributed Lagrange Multiplier/Fictitious Domain method [1],[2],[3] has been
recently implemented with a Finite Volume/Staggered Grid discretization scheme [4] and …
recently implemented with a Finite Volume/Staggered Grid discretization scheme [4] and …
A simple and efficient parallel immersed boundary-lattice Boltzmann method for fully resolved simulations of incompressible settling suspensions
This study presents an efficient and parallel fully resolved direct numerical simulation (FR-
DNS) of settling suspensions on multiple CPU cores based on the boundary-thickening …
DNS) of settling suspensions on multiple CPU cores based on the boundary-thickening …