Summary
In this study the velocity fields and the associated tangential stresses corresponding to some helical flows of Oldroyd-B fluids between two infinite coaxial circular cylinders and within an infinite circular cylinder are determined in forms of series in terms of Bessel functions. At time t = 0 the fluid is at rest and the motion is produced by the combined action of rotating and sliding cylinders. The solutions that have been obtained satisfy the governing differential equations and all imposed initial and boundary conditions. For λ r = 0, λ = 0 or λ r = λ = 0 they reduce to the similar solutions for a Maxwell, second grade or Newtonian fluid, respectively. Finally, for comparison, the velocity profiles corresponding to the four models are plotted for different values of t.
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Fetecau, C., Fetecau, C. & Vieru, D. On some helical flows of Oldroyd-B fluids. Acta Mechanica 189, 53–63 (2007). https://doi.org/10.1007/s00707-006-0407-7
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DOI: https://doi.org/10.1007/s00707-006-0407-7