scholarly journals Massively Parallel Computational Method for Large-Scale Incompressible Viscous Flow Based on Unstructured Grids.

2001 ◽  
pp. 43-53 ◽  
Author(s):  
Kazuo KASHIYAMA ◽  
Tsukasa TAMAI
Keyword(s):  
Viscous Flow ◽  
Large Scale ◽  
Unstructured Grids ◽  
Computational Method ◽  
Massively Parallel ◽  
Incompressible Viscous Flow

scholarly journals Numerical Simulation of Viscous Flow over a Square Cylinder Using Lattice Boltzmann Method

2012 ◽  
Vol 2012 ◽  
pp. 1-16 ◽  
Author(s):  
D. Arumuga Perumal ◽  
Gundavarapu V. S. Kumar ◽  
Anoop K. Dass
Keyword(s):  
Viscous Flow ◽  
Lattice Boltzmann Method ◽  
Lattice Boltzmann ◽  
Channel Length ◽  
Computational Method ◽  
Square Cylinder ◽  
Flow Past ◽  
Incompressible Viscous Flow ◽  
Method Effects ◽  
Boltzmann Method

This work is concerned with the lattice Boltzmann computation of two-dimensional incompressible viscous flow past a square cylinder confined in a channel. It is known that the nature of the flow past cylindrical obstacles is very complex. In the present work, computations are carried out both for steady and unsteady flows using lattice Boltzmann method. Effects of Reynolds number, blockage ratio, and channel length are studied in detail. As good care has been taken to include appropriate measures in the computational method, these results enjoy good credibility. To sum up, the present study reveals many interesting features of square cylinder problem and demonstrates the capability of the lattice Boltzmann method to capture these features.

A computational method for viscous flow problems

1965 ◽  
Vol 21 (4) ◽  
pp. 611-622 ◽  
Author(s):  
Carl E. Pearson
Keyword(s):  
Viscous Flow ◽  
Mathematical Problem ◽  
Vortex Formation ◽  
Computational Method ◽  
Order Partial Differential Equation ◽  
Computational Stability ◽  
Flow Problems ◽  
Incompressible Viscous Flow ◽  
Relaxation Procedure ◽  
Speed And Accuracy

A digital computer method for solving certain problems involving two-dimensional incompressible viscous flow is described. The time-dependent case is treated; the mathematical problem is thus that of solving a non-linear fourth-order partial differential equation in three variables. The choice of difference equations, of relaxation procedure, the kind of approximation to boundary conditions, and the resulting computational stability, speed, and accuracy are considered. Most experience so far has been for a rectangular region for which boundary velocities are prescribed as certain functions of time; an example of one such problem showing vortex formation and break-up is given.

scholarly journals Acoustoelectronic nanotweezers enable dynamic and large-scale control of nanomaterials

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Peiran Zhang ◽  
Joseph Rufo ◽  
Chuyi Chen ◽  
Jianping Xia ◽  
Zhenhua Tian ◽  
...  
Keyword(s):  
Large Scale ◽  
Condensed Matter ◽  
Dynamic Control ◽  
Massively Parallel ◽  
Large Field ◽  
Graphene Flakes ◽  
Field Dynamic ◽  
Scale Control ◽  
Orientation Pattern ◽  
Resolution Single

AbstractThe ability to precisely manipulate nano-objects on a large scale can enable the fabrication of materials and devices with tunable optical, electromagnetic, and mechanical properties. However, the dynamic, parallel manipulation of nanoscale colloids and materials remains a significant challenge. Here, we demonstrate acoustoelectronic nanotweezers, which combine the precision and robustness afforded by electronic tweezers with versatility and large-field dynamic control granted by acoustic tweezing techniques, to enable the massively parallel manipulation of sub-100 nm objects with excellent versatility and controllability. Using this approach, we demonstrated the complex patterning of various nanoparticles (e.g., DNAs, exosomes, ~3 nm graphene flakes, ~6 nm quantum dots, ~3.5 nm proteins, and ~1.4 nm dextran), fabricated macroscopic materials with nano-textures, and performed high-resolution, single nanoparticle manipulation. Various nanomanipulation functions, including transportation, concentration, orientation, pattern-overlaying, and sorting, have also been achieved using a simple device configuration. Altogether, acoustoelectronic nanotweezers overcome existing limitations in nano-manipulation and hold great potential for a variety of applications in the fields of electronics, optics, condensed matter physics, metamaterials, and biomedicine.

Numerical methods for incompressible viscous flow

2002 ◽  
Vol 25 (8-12) ◽  
pp. 1125-1146 ◽  
Author(s):  
Hans Petter Langtangen ◽  
Kent-Andre Mardal ◽  
Ragnar Winther
Keyword(s):  
Numerical Methods ◽  
Viscous Flow ◽  
Incompressible Viscous Flow
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