Lattice-Boltzmann lattice-spring simulations of flexibility and inertial effects on deformation and cruising reversal of self-propelled flexible swimming bodies

Luo, Yang; Wu, Tai-Hsien; Qi, Dewei

doi:10.1016/j.compfluid.2017.05.016

Cited by 11 publications

(4 citation statements)

References 54 publications

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“…A lattice-Boltzmann lattice-spring method (LLM) (27,42,(44)(45)(46) combined with the AD is employed. In this method, the LBM is used as a fluid solver to simulate the Navier-Stoke flows, the CGCM (38) is utilized to simulate motion of leukocytes, and the LSM (27) is exploited to mimic the deformation of microvilli while the fluid-solid interactions are treated by IBM.…”

Section: Computation Methodsmentioning

confidence: 99%

Studies of Bending Effects of Microvilli of Leukocyte on Rolling Adhesion

2018

Preprint

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It has been widely acknowledged that further understanding about the cell adhesion (e.g., leukocyte rolling adhesion) can help us gain more knowledge about the causes of relevant diseases and design more effective treatments and diagnoses. Although recent simulation studies considered the deformability of the leukocytes, most of them, however, did not consider the bending deformation of microvilli. In this paper, an advanced leukocyte model based on an immersed boundary lattice-Boltzmann lattice-spring model (LLM) and an adhesive dynamics (AD) is presented in details. The flexural stiffness of microvilli is introduced into the model for simulations of leukocyte rolling adhesion. This innovative model is applied to investigate the influences of bending deformation of microvilli on the process of leukocyte rolling adhesion and the underlying mechanism at different shear rates. It is demonstrated that the bending deformation of microvilli can be influenced by the flexural stiffness of microvilli and shear rates, resulting in the different rolling velocity of leukocytes, number of receptor-ligand bonds, and bond forces. The findings clearly indicate that the bending of microvilli plays a crucial role in the dynamics of leukocyte adhesion.

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Section: Computation Methodsmentioning

confidence: 99%

Studies of Bending Effects of Microvilli of Leukocyte on Rolling Adhesion

2018

Preprint

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“…The LBLS method has been extensively validated by comparing simulation results with existing theoretical and experimental results in our previous publications [28][29][30] . The Forgacs and Masons experimental results [31,32] such as springy, snake C and S shapes, coiled rotation without entanglement, helix rotation projects, coiled rotation with entanglement in a shear flow were recovered in our simulations [30] .…”

Section: Simulationmentioning

confidence: 99%

Lattice-Boltzmann lattice-spring simulations of two flexible fibers settling in moderate Reynolds number flows

Alhasan

Luo

et al. 2018

Computers & Fluids

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Dynamic motion of two flexible fibers settling in an infinitely long fluid column at moderate Reynolds numbers is numerically simulated in a three-dimensional space by using a lattice-Boltzmann latticespring method. In the simulations, rectangular and cylindrical flexible fibers are used. The fiber rigidity, density, shape, initial distance, and aspect ratio are varied at different levels and their effects on drafting, kissing, and tumbling (DKT) behavior are studied. It is demonstrated that the fiber rigidity has a profound impact on settling velocity, fluid structures, and DKT phenomenon.

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“…Actually, the major amount of particles is non-spherical in shape, e.g., cylindrical particles. The transport and deposition of cylindrical particles are very complicated because particle rotation and its orientation distribution are strongly coupled with the translation motion [4]. Moreover, inhomogeneity in the spatial and orientational distribution of particles affects the turbulent flow properties.…”

Section: Introductionmentioning

confidence: 99%

Distribution and Deposition of Cylindrical Nanoparticles in a Turbulent Pipe Flow

2021

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Distribution and deposition of cylindrical nanoparticles in a turbulent pipe flow are investigated numerically. The equations of turbulent flow including the effect of particles are solved together with the mean equations of the particle number density and the probability density function for particle orientation including the combined effect of Brownian and turbulent diffusion. The results show that the distribution of the particle concentration on the cross-section becomes non-uniform along the flow direction, and the non-uniformity is reduced with the increases of the particle aspect ratio and Reynolds number. More and more particles will align with their major axis near to the flow direction, and this phenomenon becomes more obvious with increasing the particle aspect ratio and with decreasing the Reynolds number. The particles in the near-wall region are aligned with the flow direction obviously, and only a slight preferential orientation is observed in the vicinity of pipe’s center. The penetration efficiency of particle decreases with increasing the particle aspect ratio, Reynolds number and pipe length-to-diameter ratio. Finally, the relationship between the penetration efficiency of particle and related synthetic parameters is established based on the numerical data.

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Lattice-Boltzmann lattice-spring simulations of flexibility and inertial effects on deformation and cruising reversal of self-propelled flexible swimming bodies

Cited by 11 publications

References 54 publications

Studies of Bending Effects of Microvilli of Leukocyte on Rolling Adhesion

Studies of Bending Effects of Microvilli of Leukocyte on Rolling Adhesion

Lattice-Boltzmann lattice-spring simulations of two flexible fibers settling in moderate Reynolds number flows

Distribution and Deposition of Cylindrical Nanoparticles in a Turbulent Pipe Flow

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