Investigations on Boiling Heat Transfer during Flow in Mini-Channels: Error Analysis with the Use of Monte Carlo Method

Flow boiling in mini-channels represents a highly efficient mechanism for heat dissipation in compact thermal management systems. This research direction examines the determination of local heat transfer coefficients during subcooled flow boiling within an asymmetrically heated test section containing five parallel mini-channels of 1 mm depth. Utilizing Fluorinert FC-770 as the working fluid under laminar flow conditions, the experimental setup employs infrared thermography to measure the temperature distribution on the outer surface of the heated wall, while K-type thermocouples monitor inlet and outlet fluid temperatures. The mathematical formulation utilizes the Robin boundary condition to compute the local heat transfer coefficients at the fluid-solid interface. To address the uncertainties inherent in

experimental measurements and mathematical modeling, the Monte Carlo method is implemented for comprehensive error analysis. This probabilistic approach evaluates how measurement tolerances in temperature, flow rate, and geometric dimensions propagate through the heat transfer equations. The methodology provides a robust framework for quantifying the reliability of computed heat transfer coefficients, offering critical insights for the design and optimization of high-performance mini-channel heat exchangers.

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