From https://ansyshelp.ansys.com/account/Secured?returnurl=/Views/Secured/corp/v241/en/flu_ug/flu_ug_expressions_Appendix_fieldvars.html it would appear that one is the vector and the other the scalar. However, "velocity" without a defined direction isn't overly useful. So, it's possibly the same as far as the contour etc are concerned.Â
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