SPECTRAL ELEMENT METHODS FOR LARGE-SCALE PARALLEL NAVIER-STOKES CALCULATIONS

被引：77

作者：

FISCHER, PF ^{[1
]}

RONQUIST, EM ^{[1
]}

机构：

[1] NEKTONICS INC,CAMBRIDGE,MA 02139

来源：

COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING | 1994年 / 116卷 / 1-4期

基金：

美国国家科学基金会; 美国国家航空航天局;

关键词：

D O I：

10.1016/S0045-7825(94)80009-X

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We analyze the computational complexity of a recently developed two-level iteration scheme for spectral element solution of the time-dependent incompressible Navier-Stokes equations in complex domains. We present several algorithmic advances which significantly enhance the scalability of this approach, including: implementation of an advanced combine operation for degrees-of-freedom on subdomain edges, parallel solution of the (fine-grained) coarse-grid problem, and implementation of local low-order finite element preconditioners for the find-grid problem. Timings on the 512 node Intel Delta machine show that the combined improvements lead to a fourfold reduction in Navier-Stokes solution time for the particular case of a three-dimensional boundary layer calculation consisting of one million degrees-of-freedom.

引用

页码：69 / 76

页数：8