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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Effects of parallel strategies in the transitional flow investigation

Full text
Author(s):
Rogenski, J. K. [1] ; Petri, L. A. [1] ; de Souza, L. F. [1]
Total Authors: 3
Affiliation:
[1] Univ Sao Paulo, ICMC, BR-13560970 Sao Carlos, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: Journal of the Brazilian Society of Mechanical Sciences and Engineering; v. 37, n. 3, p. 861-872, MAY 2015.
Web of Science Citations: 1
Abstract

The direct numerical simulation of transitional and turbulent incompressible flows is an area that is increasing with the advance in computational resources. Code parallelization has became a useful tool in these simulations. In the present paper the unsteady two dimensional Navier-Stokes equations are used as physical model. Tollmien-Schlichting waves propagating in a Poiseuille flow is adopted as test case. Three frequencies showing different behavior according to the linear stability theory (LST) are used: unstable, nearly neutral and stable waves. The parallelization is done via domain decomposition in the streamwise direction. The time derivative is integrated by a classical fourth-order Runge-Kutta method. High-order compact finite difference schemes are used for the spatial derivatives discretization. The Poisson equation is solved by multigrid methods. The present paper explores different parallelization techniques for solving the tridiagonal system, and the multigrid method. The results are compared with LST, and also between the different parallel strategies to show the advantages and disadvantages of each one. (AU)

FAPESP's process: 10/00880-2 - Direct Numerical SImulation of transitional flow over a roughness
Grantee:Larissa Alves Petri
Support Opportunities: Scholarships in Brazil - Doctorate
FAPESP's process: 09/03208-6 - Optimization and development of a parallel incompressible flow code
Grantee:Josuel Kruppa Rogenski
Support Opportunities: Scholarships in Brazil - Master
FAPESP's process: 13/00553-0 - Pressure gradient influence in transition flows over concave walls
Grantee:Josuel Kruppa Rogenski
Support Opportunities: Scholarships abroad - Research Internship - Doctorate
FAPESP's process: 11/08010-0 - Pressure gradient influence in transition flows over concave walls
Grantee:Josuel Kruppa Rogenski
Support Opportunities: Scholarships in Brazil - Doctorate