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Grid Inclination
The graphical surface output of the inclination of the grid is given as a average deviation from the wall normal vector in degree (fig. 17 & 18). Additionally the differences in the friction Cf to the results of the ideal reference grid were written out as an expected error in % (cfn • 100%).
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Fig. 17 RAE 2822 case9 — inclination of the grid in the boundary layer in degree (left), error in Cf caused by the inclination in the boundary layer in % (right) |
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Wall Distance y+
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y+ is a standard surface output value of the flow solver TAU. With that the implemented sensors can calculate the estimated error caused by the wall distance (fig. 19). This represents the predicted difference to the results of a simulation with the reference grid and a very small y+ in %.
Fig. 19 RAE 2822 case9 — wall distance (left), error in cf caused by the wall distance in % (right)
