*3.2. Experimental Uncertainty Analysis*

The measurement of the heat transfer coefficient depends on the test conditions and accuracy of the instruments. In this study, an uncertainty analysis was conducted according to the error propagation method given in Moffat [25]. Using this analysis, the relative uncertainty (*UR*) of the dependent parameters could be calculated using the experimental uncertainty for the primary measurements, and it was estimated using the following equation:

$$\mathcal{U}\_R = \left[ \sum\_{i=1}^n \left( \frac{\partial \mathcal{R}}{\partial X\_i} \mathcal{U}(X\_i) \right)^2 \right]^{1/2} \tag{14}$$

The results are summarized in Table 3 for the relative uncertainties and the accuracy of various parameters. A maximum uncertainty of the heat transfer coefficient was found to be 12.12% for this study.
