(New) In the flow of viscoelastic liquids, the dimensionless Weissenberg number represents the ratio of the viscoelastic force to the viscous force and has sometimes been equated to N 1/2τ, where N 1 = the first normal stress in a viscoelastic fluid flowing in simple shear and τ = the shear stress.
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Gooch, J.W. (2011). Weissenberg Number. In: Gooch, J.W. (eds) Encyclopedic Dictionary of Polymers. Springer, New York, NY. https://doi.org/10.1007/978-1-4419-6247-8_12776
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