An immersed boundary-lattice Boltzmann model for simulation of deposited particle patterns in an evaporating sessile droplet with dispersed particles

2021 ◽  
Vol 181 ◽  
pp. 121905
Author(s):  
Chaoyang Zhang ◽  
Hui Zhang ◽  
Yugang Zhao ◽  
Chun Yang
Keyword(s):  
Lattice Boltzmann ◽  
Lattice Boltzmann Model ◽  
Immersed Boundary ◽  
Sessile Droplet ◽  
Dispersed Particles ◽  
Boltzmann Model

scholarly journals An immersed boundary-lattice Boltzmann model for biofilm growth in porous media

2017 ◽  
Vol 107 ◽  
pp. 65-82 ◽  
Author(s):  
M. Benioug ◽  
F. Golfier ◽  
C. Oltéan ◽  
M.A. Buès ◽  
T. Bahar ◽  
...  
Keyword(s):  
Porous Media ◽  
Lattice Boltzmann ◽  
Lattice Boltzmann Model ◽  
Immersed Boundary ◽  
Biofilm Growth ◽  
Boltzmann Model

scholarly journals Cell-resolved blood flow simulations of saccular aneurysms: effects of pulsatility and aspect ratio

2018 ◽  
Vol 15 (146) ◽  
pp. 20180485 ◽  
Author(s):  
B. Czaja ◽  
G. Závodszky ◽  
V. Azizi Tarksalooyeh ◽  
A. G. Hoekstra
Keyword(s):  
Aspect Ratio ◽  
Lattice Boltzmann ◽  
Immersed Boundary Method ◽  
Lattice Boltzmann Model ◽  
Immersed Boundary ◽  
Small Aspect Ratio ◽  
Flow Simulations ◽  
Aspect Ratios ◽  
Aneurysm Wall ◽  
Boltzmann Model

We study the effect of pulsatile flow on the transport of red blood cells (RBCs) and platelets into aneurysm geometries with varying dome-to-neck aspect ratios (AR). We use a validated two-dimensional lattice Boltzmann model for blood plasma with a discrete element method for both RBCs and platelets coupled by the immersed boundary method. Flow velocities and vessel diameters were matched with measurements of cerebral perforating arteries and flow was driven by a synthetic heartbeat curve typical for such vessel sizes. We observe a flow regime change as the aspect ratio increases from a momentum-driven regime in the small aspect ratio to a shear-driven regime in the larger aspect ratios. In the small aspect ratio case, we see the development of a re-circulation zone that exhibits a layering of high (greater than or equal to 7 s) and low (less than 7 s) residence cells. In the shear-driven regime, we see high and low residence cells well mixed, with an increasing population of cells that are trapped inside the aneurysm as the aspect ratio increases. In all cases, we observe aneurysms that are platelet-rich and red blood cell-poor when compared with their respective parental vessel populations. Pulsatility also plays a role in the small aspect ratio as we observe a smaller population of older trapped cells along the aneurysm wall in the pulsatile case when compared with a steady flow case. Pulsatility does not have a significant effect in shear-driven regime aspect ratios.

A LATTICE BOLTZMANN STUDY ON THE LARGE DEFORMATION OF RED BLOOD CELLS IN SHEAR FLOW

2007 ◽  
Vol 18 (06) ◽  
pp. 993-1011 ◽  
Author(s):  
Y. SUI ◽  
Y. T. CHEW ◽  
H. T. LOW
Keyword(s):  
Shear Flow ◽  
Blood Cell ◽  
Red Blood Cell ◽  
Lattice Boltzmann ◽  
Vortex Pair ◽  
Lattice Boltzmann Model ◽  
Immersed Boundary ◽  
Simple Shear Flow ◽  
Single Vortex ◽  
Boltzmann Model

The transient deformation of a liquid-filled elastic capsule, simulating a red blood cell, was studied in simple shear flow. The simulation is based on a hybrid method which introduces the immersed boundary concept in the framework of the multi-block lattice Boltzmann model. The method was validated by the study on deformation of an initially circular capsule with Hooke's membrane. Also studied were capsules with Skalak membrane of initially elliptical and biconcave shapes, which are more representative of a red blood cell. Membrane tank treading motion is observed. As the ratio between membrane dilation modulus and shear modulus increases, the capsule shows asymptotic behavior. For an initially elliptical capsule, it is found that the steady shape is independent of initial inclination angle. For an initially biconcave capsule, the tank treading frequency from two-dimensional modeling is comparable to that of real cells. Another interesting finding is that the tank treading velocity has not attained steady state when the capsule shape becomes steady; and at this state there is the internal vortex pair. The treading velocity continues to decrease and reaches a steady value when the internal vortex pair has developed into a single vortex.

scholarly journals Simulations of surface acoustic wave interactions on a sessile droplet using a three-dimensional multiphase lattice Boltzmann model

2021 ◽  
Vol 104 (4) ◽  
Author(s):  
Stephen B. Burnside ◽  
Kamil Pasieczynski ◽  
Amin Zarareh ◽  
Mubbashar Mehmood ◽  
Yong Qing Fu ◽  
...  
Keyword(s):  
Acoustic Wave ◽  
Surface Acoustic Wave ◽  
Lattice Boltzmann ◽  
Three Dimensional ◽  
Lattice Boltzmann Model ◽  
Sessile Droplet ◽  
Wave Interactions ◽  
Boltzmann Model
Sign in / Sign up

Export Citation Format

Share Document