Free surface lattice Boltzmann with enhanced bubble model

Anderl, Daniela; Bogner, Simon; Rauh, Cornelia; Rüde, Ulrich; Delgado, Antonio

doi:10.1016/j.camwa.2013.06.007

Cited by 51 publications

(29 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Note that, in contrast to higher order schemes [13], the normal vector information is not considered here. Nevertheless, the model has been shown to perform well for many different free-surface scenarios [14,15] and also in the context of GPU implementations [16].…”

Section: Free Surface Modelmentioning

confidence: 99%

Validation of the GPU-Accelerated CFD Solver ELBE for Free Surface Flow Problems in Civil and Environmental Engineering

et al. 2015

View full text Add to dashboard Cite

This contribution is dedicated to demonstrating the high potential and manifold applications of state-of-the-art computational fluid dynamics (CFD) tools for free-surface flows in civil and environmental engineering.All simulations were performed with the academic research code ELBE (efficient lattice boltzmann environment, http://www.tuhh.de/elbe). The ELBE code follows the supercomputing-on-the-desktop paradigm and is especially designed for local supercomputing, without tedious accesses to supercomputers. ELBE uses graphics processing units (GPU) to accelerate the computations and can be used in a single GPU-equipped workstation of, e.g., a design engineer. The code has been successfully validated in very different fields, mostly related to naval architecture and mechanical engineering. In this contribution, we give an overview of past and present applications with practical relevance for civil engineers. The presented applications are grouped into three major categories: (i) tsunami simulations, considering wave propagation, wave runup, inundation and debris flows; (ii) dam break simulations; and (iii) numerical wave tanks for the calculation of hydrodynamic loads on fixed and moving bodies. This broad range of applications in combination with accurate numerical results and very competitive times to solution demonstrates that modern CFD tools in general, and the ELBE code in particular, can be a helpful design tool for civil and environmental engineers.

show abstract

Section: Free Surface Modelmentioning

confidence: 99%

Validation of the GPU-Accelerated CFD Solver ELBE for Free Surface Flow Problems in Civil and Environmental Engineering

et al. 2015

View full text Add to dashboard Cite

show abstract

“…[23][24][25] This model tracks the actual volume of such gas regions and the initial volume from the beginning of the simulation.…”

Section: Free Surface Lbm (Fslbm)mentioning

confidence: 99%

Numerical simulation of adsorption and bubble interaction in protein foams using a lattice Boltzmann method

et al. 2014

Self Cite

View full text Add to dashboard Cite

The adsorption process and the resulting dynamic surface tension in the context of protein foams were studied. A diffusion-advection equation is solved using a lattice Boltzmann method (LBM) in order to simulate the adsorption of surfactants on a surface. With different adsorption isotherms, different surfactants can be modelled. The advection is driven by a flow field coming from the LBM. The phase transition is implemented with a free surface LBM approach where the liquid-gas two-phase flow is simplified to a single-phase free surface flow by using a volume of fluid approach. Looking at the different time scales for diffusion and advection, which are determined by the diffusion coefficient and the viscosity, respectively, the LBM is limited due to time and space resolution. The rates of protein transport to a surface by diffusion and by advection are investigated which indicate that diffusion is only relevant for modelling long-time studies. For those time ranges and low concentrations, the diffusion of proteins from a bulk to a surface of a droplet is simulated and compared with the literature. As a next step, situations as in protein foams are assumed. High concentrations of proteins, e.g. as in milk, result in a simplified scenario where neither diffusion nor advection is important. This is analysed theoretically which suggests an instantaneous change of surface tension. To examine the stability of foam lamellae, this is used for further simulations.Two bubbles rise close to each other with globally different surface tensions as for pure water and water with proteins. Depending on these surface tensions and the initial distance, the bubbles coalesce faster for high surface tensions and show less secondary motions for lower surface tension. It is concluded that bubbles in protein foams coalesce only at shorter distances than in pure water.

show abstract

“…Different methodologies for the numerical modeling bubble dynamics in gas-liquid two-phase flow have been explored by the volume-of-fluid (VOF) method, 26,27 level set (LS) method, 28,29 and lattice Boltzmann method. 30,31 Sussman and Puckett 32 compared the coupled LS and VOF (CLSVOF) method with the LS method, the VOF method, and the boundary integral method and verified that this coupled method was superior to VOF or LS alone. Chenadec et al 33 indicated that the CLSVOF method could achieve a satisfactory mass conservation error despite the complex topology, which illustrated the ability of the proposed method to accurately compute realistic configurations.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation of bubble breakup in a four‐branched microchannel based on non‐Newtonian pseudoplastic fluid

Fan

et al. 2019

Asia-Pacific J Chem Eng

View full text Add to dashboard Cite

Bubble breakup in a four-branched microchannel with carboxymethyl cellulose (CMC) solution was investigated by an improved coupled level set and volume of fluid (CLSVOF) method based on consideration of the rheological characteristic of the fluid. The validity of the numerical approach was satisfactorily verified by comparing with the experimental results. The regime and pattern of bubble breakup were evaluated by analyzing the evolution of bubble morphology. The effects of gas velocity, solution concentration, and subchannel width on daughter bubble length were examined, respectively. The results indicate that three split regimes at the branch comprising expansion, squeezing, and pinch-off stage and three flow patterns including long slug, short slug, and bubble flows can be observed. Daughter

show abstract

Free surface lattice Boltzmann with enhanced bubble model

Cited by 51 publications

References 19 publications

Validation of the GPU-Accelerated CFD Solver ELBE for Free Surface Flow Problems in Civil and Environmental Engineering

Validation of the GPU-Accelerated CFD Solver ELBE for Free Surface Flow Problems in Civil and Environmental Engineering

Numerical simulation of adsorption and bubble interaction in protein foams using a lattice Boltzmann method

Numerical investigation of bubble breakup in a four‐branched microchannel based on non‐Newtonian pseudoplastic fluid

Contact Info

Product

Resources

About