Matched asymptotic solution for flow in a semi-hyperbolic die

Ganapathy Subramanian, Vivek Ranade, Shailesh Nagarkar, Ashish Lele*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


A semi-hyperbolic converging geometry finds application as an inexpensive elongation rheometer under certain flow conditions. We provide a matched asymptotic solution for the flow of a Newtonian fluid under no-slip boundary conditions. The predicted velocity and pressure profiles agree nearly quantitatively with CFD simulated values. Our theoretical approach has certain advantages over the known similarity solution proposed by James (1991. A.I.Ch.E. Journal 37, 59-64).

Original languageEnglish
Pages (from-to)3107-3110
Number of pages4
JournalChemical Engineering Science
Issue number11
Publication statusPublished - Jun 2005
Externally publishedYes


  • Elongation viscosity
  • Matched asymptotic solution
  • Semi-hyperbolic

ASJC Scopus subject areas

  • General Chemical Engineering


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