Heating up a lantern with a tealight candle

Authors

  • Pornrat Wattanakasiwich Department of Physics and Materials Science, Faculty of Science, Chiang Mai University, Chiang Mai, 50200 Thailand
  • P. Kongkhumbod Chiang Mai University
  • N. Pussadee Chiang Mai University

DOI:

https://doi.org/10.31349/RevMexFisE.19.010206

Keywords:

paper lanterns, drag force, buoyancy, lifting force, convection rate, tealight candle, an ill-structured problem, STEM education

Abstract

This paper provided physics principles and a method to heating up a lantern with a tealight candle, so it reaches 2.5 m within the shortest time. The experiments aimed to determine optimal parameters in filling paper lanterns with hot air and the ideal shape of lanterns that would travel most quickly in a vertical direction. Hot air from burning a 28-wick candle was directed through a heat transfer system to fill the lanterns. The small ellipsoid lantern required the shortest time. This problem is suitable as a platform for STEM education approach on topics of convection, buoyancy and drag force.

Author Biography

Pornrat Wattanakasiwich, Department of Physics and Materials Science, Faculty of Science, Chiang Mai University, Chiang Mai, 50200 Thailand

Associated Professor in Physics Education

References

D. H. Jonassen, Instructional desgn model for well-structured and ill-structured problem-solving learning outcomes, Educ. Tech. Res. 45 (1997) 65, https://doi.org/10.1007/BF02299613.

IYPT archive, 25th IYPT (2012) Problem 12 Lantern, Retrieved, May 10, 2016. http://archive.iypt.org/problems/

L. Chun-lun, Flying lantern sheds a brighter light on Archimedes' principle, Phys. Educ. 39 (2004), 382, https://doi.org/10.1088/0031-9120/39/5/F03.

Y. T. Lin, T. J. Yen, H. S. Wu, and F. Chia, Experimental study of convective heat transfer from the surface of a gyratory lantern, Int. Comm. Heat Mass Transfer, 27 (2000) 719, https://doi.org/10.1016/S0735-1933(00)00152-4.

Engineering ToolBox, Drag Coefficient, Retrieved, June 15, 2020. https://www.engineeringtoolbox.com/drag-coefficient-d_627.html.

National Candle Association, Retrieved, January 17, 2012. http://www.candles.org/home_types.html.

A. Hamins and M. Bundy, Characterization of candle flames, J. of Fire Prot. Eng. 15 (2005) 265, https://doi.org/10.1177/1042391505053163.

Air density calculator, Retrieved, May 10, 2020. https://www.gribble.org/cycling/air_density.html.

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Published

2022-01-01