An Experimental Study on Resonance of Temperature Field by Low-Frequency Oscillating Wall in a Side Heated Enclosure

Title & Authors
An Experimental Study on Resonance of Temperature Field by Low-Frequency Oscillating Wall in a Side Heated Enclosure
Kim, Seo-Yeong; Kim, Seong-Gi; Choe, Yeong-Don;

Abstract
An experimental study has been conducted to elucidate the resonance of natural convection in a side-heated square enclosure having a mechanically oscillating bottom wall. Under consideration is the impact of the imposed oscillating frequency, amplitude and the system Rayleigh number on the fluctuation of air temperatures. The experimental results show that the magnitude of the fluctuation of air temperature is substantially augmented at a specific forcing frequency of the oscillating bottom wall. The resonant frequency is increased with the increase of the Rayleigh number and it is little affected by the amplitude of the oscillating wall. It is also found that the resonant frequency is relevant to the Brunt- V$\small{\"{a}}$iS$\small{\"{a}}$l$\small{\"{a}}$ frequency which represents the stratification degree of the system.
Keywords
Natural Convection;Flow Resonance;Internal Gravity Wave;Fluctuating Amplitude;
Language
Korean
Cited by
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