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This paper studies the relationship between drag coefficient of particle clusters and the particle Reynolds number during settling process using Lattice Boltzmann Method. The interaction among each particle in the cluster was briefly discussed. This simulation calculated the drag coefficient of five-particle cluster with different Reynolds numbers. The drag coefficients for the particles at different...
The lattice Boltzmann method is a well-established numerical approach for complex fluid flow simulations. Recently general-purpose graphics processing units have become accessible as high-performance computing resources at large-scale. We report on implementing a lattice Boltzmann solver for multi-GPU systems that achieves 0.69 PFLOPS performance on 16384 GPUs. In addition to optimizing the data layout...
We present a new parallel-in-time method designed to reduce the overall time-to-solution of a patient-specific cardiovascular flow simulation. Using a modified Para real algorithm, our approach extends strong scalability beyond spatial parallelism with fully controllable accuracy and no decrease in stability. We discuss the coupling of spatial and temporal domain decompositions used in our implementation,...
In this work, the droplet behaviour in a micro-channel of a proton exchange membrane fuel cell was simulated. The lattice Boltzmann method (LBM) was used to keep track of the deformation of the liquid-gas interface. A three-dimensional case was considered and a D3Q19 scheme was utilized to simulate a two phase droplet in a in a hydrophobic channel. The Shan-Chen model was employed in this study because...
The lattice Boltzmann method is increasingly important in facilitating large-scale fluid dynamics simulations. To date, these simulations have been built on discretized velocity models of up to 27 neighbors. Recent work has shown that higher order approximations of the continuum Boltzmann equation enable not only recovery of the Navier-Stokes hydro-dynamics, but also simulations for a wider range...
An early wildfire detection is essential in order to assess an effective response to emergencies and damages. In this paper, we propose a low-cost approach based on image processing and computational intelligence techniques, capable to adapt and identify wildfire smoke from heterogeneous sequences taken from a long distance. Since the collection of frame sequences can be difficult and expensive, we...
The understanding of biological processes, e.g. related to cardio-vascular disease and treatment, can significantly be improved by numerical simulation. In this paper, we present an approach for a multiscale simulation environment, applied for the prediction of in-stent re-stenos is. Our focus is on the coupling of distributed, heterogeneous hardware to take into account the different requirements...
We are witnessing a rapid evolution of HPC node architectures and on-chip parallelism as power and cooling constraints limit increases in microprocessor clock speeds. In this work, we demonstrate a hierarchical approach towards effectively extracting performance for a variety of emerging multicore-based supercomputing platforms. Our examined application is a structured grid-based Lattice Boltzmann...
A new SoC-based hardware architecture for interactive watercolor paint simulation based on the lattice Boltzmann fluid dynamics simulation model is presented. A scalable proof-of-concept FPGA based hardware prototype achieves a VGA framerate of 60 fps with a resolution of 160×120.
This paper presents numerical study of droplet dynamics on solid surface using multiphase model of lattice Boltzmann method. This method is an efficient alternative tool for the numerical simulation of multiphase flow. In this paper, we start by describing a choice of interaction potential that reproduces the attraction force between particles together with the varying contact angles on surface by...
This paper presents the simulation of natural heat convection in an enclosure with different aspects ratio using the lattice Boltzmann method. D2Q9 lattice model was coupled with the simplest D2Q4 lattice model to represent density and internal energy distribution function respectively. The effects of the Rayleigh number on the flow pattern at aspect ratio of 0.25, 0.5, 1.5, and 4 were studied. The...
Gas migrating in goaf and congregating in upper corner result in gas over limit in upper corner which greatly influences coal mining safety. To explore the cause of upper corner gas over limit and control it, this paper provides Lattice Boltzmann Method (LBM) simulation of gas migration and control in goaf of fully mechanized coal caving mining face. After analyzing the characteristics of goaf, a...
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