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Effects of unsteady expansion/contraction of Wang's cylinder problem with suction near a stagnation point
Author(s) -
Javed Tariq,
Mustafa Irfan
Publication year - 2014
Publication title -
asia‐pacific journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.348
H-Index - 35
eISSN - 1932-2143
pISSN - 1932-2135
DOI - 10.1002/apj.1861
Subject(s) - stagnation point , boundary layer , partial differential equation , suction , cylinder , ordinary differential equation , matrix similarity , mechanics , mathematics , nonlinear system , stagnation temperature , heat transfer , mathematical analysis , compressibility , physics , differential equation , thermodynamics , geometry , quantum mechanics
The unsteady viscous incompressible stagnation point flow over an expanding/contracting cylinder with heat and mass transfer is studied in this article. The governing partial differential equations are transformed into a couple nonlinear ordinary differential equations by using similarity transformation. These obtained nonlinear ordinary differential equations are solved numerically by using spectral method. There exist unique, dual, and triple solutions in the presence of unsteadiness parameter S for different values of velocity ratio parameter. The ranges for which the unique, dual, and triple solutions exist are shown through graphs and in tabular form. It is observed that the temperature and thermal boundary layer thickness decrease by increasing the absolute values of S in expanding cylinder case. However, this behavior is opposite in contracting cylinder case. © 2014 Curtin University of Technology and John Wiley & Sons, Ltd.