The significance of coherent flow structures for the turbulent mixing ...

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7 Investigation of the yz-plane
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FIGURE 7.4: Primary two-point correlations measured at ˜$vpš5œ§§žž (left) and 15000 (right) and
comparison with results from ¨&© -investigation (opaque symbols).
does not affect the calculation of the correlations at all. Figure 7.4 shows the dependence of
the primary correlations on the location of the fixed point ª«§v­¬2®c¯ for (left column) and
k±° c (right column) in comparison with the results presented in chapter 5 (opaque
ª«§vj¬
symbols). Generally it can be seen that the agreement is very good, although the location of
the fixed point is not exactly identical due to the different grid applied for the calculation of
the velocity vectors. Thus, it can be concluded that the measurement technique is very reliable
even if the orientation of the measurement plane is normal with regard to the main flow
direction. Based on this result various correlations will be presented in the following in order
to complete the results presented in the previous chapters.
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