Leading edge effect during transient buoyancy induced flow adjacent to a vertical cylinder

✍ Scribed by K. Velusamy; Vijay K. Garg

• Book ID: 104136044
• Publisher: Elsevier Science
• Year: 1993
• Tongue: English
• Weight: 451 KB
• Volume: 36
• Category: Article
• ISSN: 0017-9310
• DOI: 10.1016/s0017-9310(05)80172-3

✦ Synopsis

The rate of propagation of the leading edge effect (LEE) during transient natural convection adjacent to a vertical solid cylinder is estimated from five different criteria. The cylinder has an appreciable thermal capacity and is subjected to a sudden heat generation. Numerical results are presented for a wide range of cylinder radii and heat flux values for two fluids, air and water. It is found that unlike the case of a flat platk, there is no unique criterion which would always estimate the fastest rate of propagation of LEE in water. However in air. the criterion due to Brown and Riley (J. Fluid Mech. 59, 225-237 (1973)) always predicts the fastest rate of propagation. Also, the effect of c$&der radius on the rate at which the LEE propagates through different fluids is different. For identical conditions, the LEE propagates faster in air than in water, as expected. Present results obtained by dropping the curvature terms in the governing equations match very well with previous analytical results for a flat plate.