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https://doi.org/10.3938/NPSM.68.84
Development of a Convection Experiment Apparatus and its Applications
New Phys.: Sae Mulli 2018; 68: 84~93
Published online January 31, 2018;  https://doi.org/10.3938/NPSM.68.84
© 2018 New Physics: Sae Mulli.

Taekyu KIM*

Department of Science Education, Jeonju National University of Education, Jeonju 55101, Korea
Correspondence to: tkkim@jnue.kr
Received September 26, 2017; Revised November 6, 2017; Accepted November 8, 2017.
cc This is an open-access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
A convectional experiment apparatus has been developed so that convective experiments can be performed normally in the science class. The apparatus is composed of a convection box, a light source box, the object, and a smoke box with an incense stick. The reproducibility of convective experiments was ensured by them controlling the variables and quantifying the measured values. The characteristics of the smoke flowing from the incense stick depended on the size of convection box, the spacing of objects, and the height, position and depth of the ember of the incense stick. Those characteristics were also affected by the flow speed of rising smoke and the differences between the surface temperature of the objects and the temperature inside the convection box. Changes in those characteristics and in the direction of smoke flow, in particular a reversal of direction, with changing surface temperature of the objects were continuously measured. The experimental convection device developed in this study can be utilized in experiments related to convection.
PACS numbers: 01.40.Eg
Keywords: Convection, Incense stick, Wind, Land and sea breeze


May 2018, 68 (5)
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