| Full text | |
| Author(s): |
Total Authors: 3
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| Affiliation: | [1] Univ Sao Paulo, ICMC, BR-13560970 Sao Carlos, SP - Brazil
Total Affiliations: 1
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| 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 |