CS1 - Tandem Spheres Re=3900

The aim of this test case is to asses the accuracy and efficiency of high-order solvers for the prediction of complex unsteady multi-scale flow under low Mach and low Reynolds number conditions. A uniform free stream initial condition is specified from the Mach number (M = 0.1), Reynolds number based on single sphere diameter, D, (Re = 3900), and Prandtl number (P r = 0.72). To enable a manageable work load through spatial and temporal resolution studies the comparison of quantities of interest is to be carried out on the non-dimensional time interval t  ∈ [100, 200].

All hexahedral and all tetrahedral girds provided by Steve Karman of Pointwise and Samuel James of GridPro are available here in CGNS and gmsh file formats. As the CGNS standard is vague on the reference coordinate location of face coordinates of quartic (P4) tetrahedral elements, the CGNS files provided by pointwise uses equidistributed nodes on the reference element.

NOTE: As of 6/10/2017 the writeup for this test case has changed the verification test from the laminar Joukowski airfoil to the Taylor Green Vortex.

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