Unsteady flow of a non-linear viscoelastic fluid in pipes

Mario F. Letelier, Nicolás Madariaga, Dennis A. Siginer

Research output: Contribution to journalArticlepeer-review


Flow of a viscoelastic fluid in round pipes is analyzed for the case where the pressure gradient is oscillatory with varying amplitude. The fluid is modelled according to Phan-Thien-Tanner's constitutive equation. The analysis is carried out by using the perturbation method in which a material parameter is considered small. Velocity field and other kinematic and dynamic variables are evaluated for a range of relevant parameters. The results are compared with the base Newtonian and linear Maxwell flows. The effect of the PTT model in these type of flows is highlighted.

Original languageEnglish
Article numberIMECE2004-59693
Pages (from-to)829-833
Number of pages5
JournalAmerican Society of Mechanical Engineers, Fluids Engineering Division (Publication) FED
Publication statusPublished - 2004

All Science Journal Classification (ASJC) codes

  • Engineering(all)


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