Large-scale fluid simulation using velocity-vorticity domain decomposition

Parallel domain decomposition simulation for large-scale power grid

This paper presents a fully parallelized domain decomposition (DD) technique for efficient simulation of large-scale linear circuits such as power grids. Domain decompositions using non-overlapping and overlapping partitions are developed to conquer the numerical difficulties in simulation. Experimental results show that by the proposed parallel DD framework, existing linear circuit simulators ...

A Domain Decomposition Strategy for Simulation of Industrial Fluid Flows

Vorticity generation in large-scale structure caustics

A fundamental hypothesis for the interpretation of the measured large-scale line-of-sight peculiar velocities of galaxies is that the large-scale cosmic flows are irrotational. In order to assess the validity of this assumption, we estimate, within the frame of the gravitational instability scenario, the amount of vorticity generated after the first shell crossings in large-scale caustics. In t...

Generation of large-scale vorticity in a homogeneous turbulence with a mean velocity shear.

An effect of a mean velocity shear on a turbulence and on the effective force which is determined by the gradient of the Reynolds stresses is studied. Generation of a mean vorticity in a homogeneous incompressible nonhelical turbulent flow with an imposed mean velocity shear due to an excitation of a large-scale instability is found. The instability is caused by a combined effect of the large-s...

Domain Decomposition Algorithms for PDEproblems with Large Scale

We consider a Schur complement BPS-like domain decomposition algorithm for the 2D drift-diiusion equations arising from semiconductor modeling. In particular, we focus on two problems: anisotropic phenomena and large changes in the PDE coeecients as one moves spatial within the domain. The preconditioners that we discuss are essentially BPS preconditioners 2] where the interface coupling is app...