Can someone please help me with the symbol for background shear? To give you a bit of context, I am referring to background shear as in the following sentence taken from Hussian et al.:

Vorticity magnitude has been widely used to educe CS and represent vortex cores. However, this approach, though fairly successful in the free shear flows investigated so far, may not always be satisfactory since vorticity magnitude does not identify vortex cores in a shear flow, especially if the background shear is comparable to the vorticity magnitude within the vortex

  • $\begingroup$ Most textbooks, publications and even CFD codes state the symbols they use for variables and constants. This saves confusion as they can be checked. $\endgroup$
    – Solar Mike
    May 25 at 7:06

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