Effects of parallel strategies in the transitional flow investigation

Autor(es)

Rogenski, J. K. ^[1] ; Petri, L. A. ^[1] ; de Souza, L. F. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, ICMC, BR-13560970 Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Journal of the Brazilian Society of Mechanical Sciences and Engineering; v. 37, n. 3, p. 861-872, MAY 2015.
• Citações Web of Science: 1

Resumo

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)

• Processo FAPESP: 10/00880-2 - Simulação Numérica Direta de Escoamento Transicional sobre uma Superfície contendo Rugosidade
• Beneficiário: Larissa Alves Petri
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 09/03208-6 - Desenvolvimento e otimização de um código paralelizado para simulação de escoamentos incompressíveis
• Beneficiário: Josuel Kruppa Rogenski
• Modalidade de apoio: Bolsas no Brasil - Mestrado
• Processo FAPESP: 13/00553-0 - Influência do gradiente de pressão na transição de escoamentos sobre superfícies côncavas
• Beneficiário: Josuel Kruppa Rogenski
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Doutorado
• Processo FAPESP: 11/08010-0 - Influência do gradiente de pressão na transição de escoamentos sobre superfícies côncavas
• Beneficiário: Josuel Kruppa Rogenski
• Modalidade de apoio: Bolsas no Brasil - Doutorado