Global flow stability results for the flow around a sphere at Re = 300


Preliminary results, obtained with parallel, 3D global stability analysis for the flow around a sphere. The real part of one of the dominating eigenvectors is shown. Vx,Vy,Vz and averaged V values are depicted. Details of the procedure are described in Morzyński & Thiele, AIAA 2008-3865,  Finite Element Method for Global Stability Analysis of 3D Flows.


mode_0_a

mode_0_b

Stable zero frequency mode  Re=300

mode1_remode1_im

Eigenmode – Re and Im part, Re=300

mode2_im

mode2_re

Eigenmode – Re and Im part, Re=300

mode2_re_vxmode2_re_vymode2_re_vz

Eigenmode, Re=300, Vy, Vz and Vx component, respectively.

disturb_final-258

Stable, double-thread wake for Re=250  computed with unsteady solver.  Vx is depicted.