Learning Forum

[Rob]

If you don't pick anything in the surfaces list on the contour panel in 2d you'll get a better picture. 

Thanks. Whilst you are interested in the pathlines tracing problems usually requires more/other information. Pathlines doing that are usually associated with very skew cells or underesolved velocity gradients, I can't see either in this case although the problems do seem to be related to the slightly odd cells between blocks of mostly map mesh. Zoom in & replot velocity for the "blue" contour band range and node values off.