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Convective heat-transfer coefficients: The colour-change paint technique

Author

Listed:
  • Jambunathan, K.
  • Edwards, R.J.
  • Button, B.L.

Abstract

The colour/phase change paint technique requires the determination of transient conduction characteristics of the test specimen in order to obtain convective heat-transfer coefficients. In an attempt to define and optimise the relevant variables, a parametric study has been conducted using a combination of experimental and numerical methods. Five factors affecting the accuracy of the technique have been identified, leading to a minimum error in the estimated values. The technique has been applied to natural convection on a heated flat plate facing downward in water. The results are compared with existing data, errors quantified and specimen parameters established to obtain reliable data.

Suggested Citation

  • Jambunathan, K. & Edwards, R.J. & Button, B.L., 1987. "Convective heat-transfer coefficients: The colour-change paint technique," Applied Energy, Elsevier, vol. 28(2), pages 137-152.
    • Handle: RePEc:eee:appene:v:28:y:1987:i:2:p:137-152
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