Please use this identifier to cite or link to this item:
Fulltext available Open Access
Title: GPU-accelerated LBM-VOF two-phase flow simulations with grid refinement
Language: English
Authors: Gehrke, Martin  
Mierke, Dennis  
Janßen, Christian F.  
Rung, Thomas 
Keywords: Lattice Boltzmann Method;Grid Refinement Scheme;Volume of Fluid Interface Capturing Method;Free Surface Flows;Wave Propagation;GPU Computing with Nvidia CUDA
Issue Date: May-2017
Abstract (english): The contribution is devoted to a novel grid refinement technique for GPU-accelerated Lattice Boltzmann Method (LBM) dedicated to free surface flow simulations in marine applications. LBM implementations are mostly based on homogeneous isotropic Cartesian discretizations of the computational domain. Challenges occur when a refined spatial and temporal resolution is locally required. To efficiently address this demand, local grid refinement is often deployed to regions featuring small scale structures and effects to be resolved. Within the LBM the spatial and temporal discretizations are strongly coupled. Hence, LBM solvers featuring local grid refinement are suitable for the simulation of transient, turbulent and free surface flows. The present LBM involves a Volume of Fluid (VOF) strategy to model two-phase flows. Herein, the advection of a mixture volume fraction serves to advance the free-surface in time. The employed grid refinement is based on overlapping grids with different resolution. The bidirectional information exchange between the grids is managed via bi[tri]-linear interpolations for two[three]-dimensional simulations. For single-phase flows this synchronisation step comprises the exchange of LBM specific variables solely. When attention is directed to two-phase flows, the inter- grid coupling of the mixture fraction poses a special algorithmic problem. The suggested coupling approach is based on a Piecewise Linear Interface Construction (PLIC) method. Accordingly, the information about the surfaces orientation and position is employed to compute the fill level more accurate within the overlapping regimes. Examples included refer to two- and three-dimensional test cases and reveal that the proposed method is able to reproduce accurate results at fairly moderate computational effort.
Conference: International Conference on Computational Methods in Marine Engineering 
DOI: 10.15480/882.2049
Institute: Fluiddynamik und Schiffstheorie M-8 
Type: Präsentation
License: In Copyright In Copyright
Appears in Collections:Publications with fulltext

Files in This Item:
File Description SizeFormat
MARINE_2017_MGehrke.pdfMarine 2017 - Presentation - M. Gehrke - GPU-Accelerated LBM-VOF Two-Phase Flow Simulations with Grid Refinement2,75 MBAdobe PDFThumbnail
Show full item record

Page view(s)

Last Week
Last month
checked on Sep 27, 2020


checked on Sep 27, 2020

Google ScholarTM


Note about this record


Items in TORE are protected by copyright, with all rights reserved, unless otherwise indicated.