Effect of the angle of oblique stagnation-point flow impinging axisymmetrically on a vertical circular cylinder with mixed convection heat transfer

• Published in: International journal of sustainable energy Vol. 38; no. 9; pp. 849 - 865
• Main Authors: Rahimi, Asghar B., Bayat, Reza
• Format: Journal Article
• Language: English
• Published: Abingdon Taylor & Francis 21.10.2019; Taylor & Francis Ltd; Taylor & Francis Group
• Subjects: axisymmetric; Boundary layers; Buoyancy; Circular cylinders; Computational fluid dynamics; Convection; Fluid flow; Heat transfer; Incompressible flow; mixed convection; Oblique stagnation-point flow; Obliqueness; Parameters; Stagnation; vertical circular cylinder; Vertical cylinders
• ISSN: 1478-6451; 1478-646X
• DOI: 10.1080/14786451.2019.1601628

Governing equations in the boundary layer induced by a steady incompressible oblique stagnation-point flow axisymmetrically impinging on a vertical constant temperature cylinder along with mixed convection heat transfer due to buoyancy forces are reduced to ODEs using similarity transformations and are solved numerically. Assuming constant strength for the oblique flow and by changing the obliqueness angle α in between zero to 90°, solution of equations' system has been repeated at any specific value of α in the states of assisting or opposing flow. Using the resulting data, the behaviour of the flow parameters like Nusselt number, situation of streamline Ψ = 0 at incident point and other characteristics are found against the flow obliqueness angle. The results are presented for Reynolds numbers 0.1, 1, 10, and 100 and buoyancy parameter values of in which the heat and flow mechanisms are special cases of opposing flow, no buoyancy flow, and assisting flow, respectively.