E​RCOFTAC PC Iberia

DNS of the Turbulent Flow Around a Square Cylinder at Re=55000

Authors: Francesc Xavier Trias, Adel Alsalti-Baldellou
(Technical University of Catalonia (UPC), Heat and Mass Transfer Technological Center C/Colom 11, Terrassa, Spain)

Direct numerical simulation of the turbulent flow around a square cylinder at Reynolds number 55000 (based on the diameter of the cylinder, D, and the inflow velocity, U). The dimensions of the domain are 30.5D×54D×πD in the stream-wise, cross-stream and span-wise direction, respectively. The upstream face of the cylinder is located at 10D from the inflow and centered in the cross-stream direction. The origin of coordinates in placed at the center of the cylinder. At the inflow, a constant velocity profile, U, is prescribed and convective boundary condition are used at the outflow. The Neumann boundary condition is adopted at the cross-stream direction. Periodic boundary conditions are imposed in the span-wise direction. Finally, no-slip boundary conditions are imposed at the surface of the cylinder. We have used a (2544 × 2348 × 432 ≈ 2580M grid points) staggered mesh to cover the computational domain. The grid is stretched out away from the cylinder surface by means of a piece-wise tanh-function. An energy-conserving spatial discretization has been used.

Links

A full resolution image and the 4K resolution movie (also a lower resolution version) can be downloaded here:
• Image: www.fxtrias.com/movies/Milton Van Dyke/Cyl Re55K frame.jpg
• 4K movie: www.fxtrias.com/movies/Milton Van Dyke/Cyl55K.avi
• Low resolution movie: www.fxtrias.com/movies/Milton Van Dyke/Cyl55K lowres.avi

Furthermore, the movie is also available online in my YouTube channel:
• YouTube movie: https://www.youtube.com/watch?v=QN bY9VVQxs
• Movie cover: www.fxtrias.com/movies/Milton Van Dyke/Cyl Re55K thumbnail.jpg