A viscoelastic fluid model is weak-nonlinearly perturbed. There is no viscoelasticity in lowest-order solution. What does it mean?

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Vikash Pandey

Need more info. Has it lost viscosity or elasticity or both? Is there a constant term in the lowest-order, related to the model?

P.K. Karmakar

The perturbed fluid model gets reduced into a third-order nonlinear differential equation in a lowest-order. It is free from from viscoelasticity. Higher-order terms are not, however. Can you give some references with examples in this regard? .