The issue of boiling liquid flow through a minichannel inclined from the vertical is considered. The outer wall of the channel is a foil acting as a heat source, the temperature of which is measured using the liquid crystal thermography method. In order to select measurements with the smallest possible measurement errors, the adjustment calculus for constrained problems was used. The adopted condition was the relationship between temperature measurements and a linear combination of Trefftz functions (T-functions). The adjustment calculus allowed for the minimization of measurement errors and a reduction in the mean relative errors of heat transfer coefficients.An extremely important issue when processing data obtained from experimental research is measurement errors. (…)
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Source: Logistyka Magazine