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http://dx.doi.org/10.5407/jksv.2022.20.1.029

Experimental study of natural transition in natural convection boundary layer  

Huang, ShengZhong (School of Mechanical Engineering, Pusan National University)
Yousif, Mustafa Z. (School of Mechanical Engineering, Pusan National University)
Lim, Hee-Chang (School of Mechanical Engineering, Pusan National University)
Publication Information
Journal of the Korean Society of Visualization / v.20, no.1, 2022 , pp. 29-37 More about this Journal
Abstract
We carried out a laboratory experiment about the thermo-fluidic characteristics of natural convection boundary layer over a vertical heated plate under constant heat flux condition. Particle image velocimetry has been applied to observe the surface convection velocity close to the vertical plate submerged in the water chamber with the condition of Ra = 7 × 109 and Pr = 8.1. The velocity distributions indicate that the distinct stripe-like structures appears in the upstream (earlier transition region) and the distinct negative-positive and Λ(λ)-shaped flow structures in the downstream (mid-transition region). In addition, the temporal variation of spanwise and streamwise velocity is also presented.
Keywords
natural transition; particle image velocimetry; natural convection; constant heat flux;
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