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The mesh of 2D models is swept in the z-direction with a width of 0.1m (lengthxheightxwidth(x*y*z) = 0.2*1*0.1), and a mesh interval size of 0.002m (#intervals=50), which is in the same order of magnitude as that of x and y directions.
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Results and Discussion
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Since the finer mesh contains 1,500,000 cells, which is 50 times as many as that of the 2D mesh and 70 times as big as the 2D mesh in terms of the file size, the iteration takes about 30 seconds per step. After about 3000 iterations for 30 hours, the residual plots showed a promising tend to fall below a satisfactory level. (The simulations is still running at this moment)
(Still waiting for the more converged results for the energy dissipation contour...)
started to oscillating with no further trend of convergence. The residual of continuity stays a little above e-5 and the others between e-6 and e-5.
Shown below are the residual plot, energy dissipation contour of various rendering surface and the pathline in mid-width plane and the whole domain.Residual plot at 3096th iteration with maximum scaled residual of about e-5
Energy dissipation contour at 3096th iteration with maximum scaled residual of about e-5, for the plane at mid-width