Lattice Boltzmann simulations of viscoplastic fluid flows through complex flow channels

During the last 2.5 years, the RealityGrid project has allowed us to be one of the few scientific groups involved in the development of computational Grids. Since smoothly working production Grids are not yet available, we have been able to substantially influence the direction of software and Grid deployment within the project. In this paper, we review our results from large-scale three-dimensional lattice Boltzmann simulations performed over the last 2.5 years. We describe how the proactive use of computational steering, and advanced job migration and visualization techniques enabled us to do our scientific work more efficiently. The projects reported on in this paper are studies of complex fluid flows under shear or in porous media, as well as large-scale parameter searches, and studies of the self-organization of liquid cubic mesophases.

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Lattice Boltzmann Simulations of Fluid Flows

Lecture Notes in Computer Science - Advanced Parallel Processing Technologies ◽

10.1007/978-3-540-39425-9_39 ◽

2003 ◽

pp. 322-332

Author(s):

Baochang Shi ◽

Nangzhong He ◽

Nengchao Wang ◽

Zhaoli Guo ◽

Weibin Guo

Keyword(s):

Lattice Boltzmann ◽

Fluid Flows ◽

Lattice Boltzmann Simulations

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Introducing a variable speed of sound in single-component lattice Boltzmann simulations of isothermal fluid flows

Computers & Fluids ◽

10.1016/j.compfluid.2018.02.037 ◽

2018 ◽

Vol 167 ◽

pp. 129-145 ◽

Cited By ~ 1

Author(s):

N. Looije ◽

J.J.J. Gillissen ◽

S. Sundaresan ◽

H.E.A. Van den Akker

Keyword(s):

Speed Of Sound ◽

Lattice Boltzmann ◽

Fluid Flows ◽

Single Component ◽

Variable Speed ◽

Lattice Boltzmann Simulations ◽

Isothermal Fluid

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Lattice Boltzmann Simulations of CO2 Bubble Dynamics at the Anode of a μDMFC

Journal of Fuel Cell Science and Technology ◽

10.1115/1.2174067 ◽

2005 ◽

Vol 3 (2) ◽

pp. 180-187 ◽

Cited By ~ 7

Author(s):

K. Fei ◽

C. H. Cheng ◽

C. W. Hong

Keyword(s):

Surface Tension ◽

Pore Size ◽

Flow Rate ◽

Diffusion Layer ◽

Lattice Boltzmann ◽

Stream Flow ◽

Bubble Dynamics ◽

Solid Wall ◽

Flow Channels ◽

Lattice Boltzmann Simulations

This paper presents the bubble transport phenomenon at the anode of a micro-direct methanol fuel cell (μDMFC) from a mesoscopic viewpoint. Carbon dioxide bubbles generated at the anode may block part of the catalyst/diffusion layer and also the flow channels that cause the μDMFC malfunction. Lattice-Boltzmann simulations were performed in this paper to simulate the two-phase flow in a microchannel with an orifice which emulates the bubble dynamics in a simplified porous diffusion layer and in the flow channel. A two-dimensional, nine-velocity model was established. The buoyancy force, the liquid-gas surface tension, and the fluid-solid wall interaction force were considered and they were treated as source terms in the momentum equation. Simulation results and parametric studies show that the pore size, the fluid stream flow rate, the bubble surface tension, and the hydrophilic effect between the fluid and the solid wall play the major roles in the bubble dynamics. Larger pore size, higher methanol stream flow rate, and greater hydrophilicity are preferred for bubble removal at the anode diffusion layer and also the flow channels of the μDMFC.

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