Peristaltic flow of hyperbolic tangent fluid in a diverging tube with heat and mass transfer

S. Nadeem, Sadaf Ashiq, Noreen Sher Akbar, Changhoon Lee

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


The writers have studied peristaltic flow of a hyperbolic tangent fluid in a diverging tube. The flow was investigated in a wave frame of reference moving with the velocity of the wave. The governing equations of hyperbolic tangent fluid in cylindrical coordinates were modeled. Heat and mass transfer phenomena were taken into consideration. The resulting nonlinear momentum, energy, and mass equations were simplified using long wavelength and low Reynolds number approximations. The resulting problem was solved using two analytical techniques, a regular perturbation method in terms of a variant of the Weissenberg number, and a homotopy analysis method. A graphical comparison of both of the solutions is presented for velocity, temperature, and concentration profiles. The expressions for axial velocity, temperature, mass concentration, heat and mass transfer coefficients, and axial pressure gradient were obtained, and the effects of various emerging parameters on these flow characteristics are illustrated graphically. The writers graphically demonstrate the numerical results for the pressure rise and frictional force for different waveforms (sinusoidal, multi-sinusoidal, triangular, square, and trapezoidal). Trapping phenomena were taken into consideration when plotting the streamlines pattern.

Original languageEnglish
Pages (from-to)124-135
Number of pages12
JournalJournal of Energy Engineering
Issue number2
Publication statusPublished - 2013 Jun

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Renewable Energy, Sustainability and the Environment
  • Nuclear Energy and Engineering
  • Energy Engineering and Power Technology
  • Waste Management and Disposal


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