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Transient free convection flow of a viscoelastic fluid over vertical surface
Authors:H M Duwairi  R A Damseh  A J Chamkha  M S Abdel-Jaber
Institution:1. Mechanical Engineering Department, Faculty of Engineering and Technology, The University of Jordan, Amman 11942, Jordan; 2. Mechanical Department, Al-Husun University College, Albalqa Applied University, Irbid 21510, Jordan; 3. Manufacturing Engineering Department, The Public Authority for Applied Education and Training, Shuweikh 70654, Kuwait; 4. Civil Engineering Department, Faculty of Engineering and Technology, The University of Jordan, Amman 11942, Jordan
Abstract:In this paper, the viscoelsatic boundary layer flow and the heat transfer near a vertical isothermal impermeable surface and in a quiescent fluid are examined. The governing equations are formulated and solved numerically using MackCormak's technique.The results show excellent agreement with previously published results by a comparision. Representative results for the velocity and temperature profiles, boundary layer thicknesses, Nusselt numbers, and local skin friction coefficients are shown graphically for different values of viscoeisatic parameters. In general, it is found that the velocities increase inside the hydrodynamic boundary layers and the temperatures decrease inside the thermal boundary layers for the viscoelsatic fluid as compared with the Newtonian fluid due to favorable tensile stresses. Consequently, the coefficients of friction and heat transfer enhance for higher viscoelsatic parameters.
Keywords:viscoelastic flows  transient  free convection heat transfer
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