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Updated: Aug 20, 2026

Studying Large Amplitude Oscillatory Shear Response of Soft Materials
Published on: April 25, 2019
Optimal behavior of viscoelastic flow at resonant frequencies
A A Lambert1, G Ibáñez, S Cuevas
1Centro de Investigación en Energía, Universidad Nacional Autónoma de México, A. P. 34, 62580 Temixco, Morelos, México. ala@cie.unam.mx
Abstract:
The global entropy generation rate in the zero-mean oscillatory flow of a Maxwell fluid in a pipe is analyzed with the aim of determining its behavior at resonant flow conditions. This quantity is calculated explicitly using the analytic expression for the velocity field and assuming isothermal conditions. The global entropy generation rate shows well-defined peaks at the resonant frequencies where the flow displays maximum velocities. It was found that resonant frequencies can be considered optimal in the sense that they maximize the power transmitted to the pulsating flow at the expense of maximum dissipation.
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