Experimental study of micro flow boiling: Assessing existing correlations and developing a new prediction tool
Abstract
In the present paper, under pseudo-steady-state conditions, an experimental data set was obtained to evaluate the micro-flow boiling in cross-configured pin-finned heat sinks. A new data set was then used to investigate the predictive capability of existing correlations. Subsequently, a new empirical correlation was proposed to better characterize flow boiling in cross-configured micro-pin-finned heat sinks. To increase borders of dataset, three different mass fluxes (174, 234, 294 kg m-2 s-1) with effective heat flux (148.5 to 460.1 kW m-2) were considered. Discussion is strengthened by flow visualization output. It is concluded that with increasing heat flux, a general decreasing trend in two-phase heat transfer coefficient (htp) is observed for all mass flux values. Complex flow interactions induced by the specific layout of the pin fins, necessitate a more specialized empirical model. In this regard a new correlation was developed, and with proposed new correlation, 26 out of 27 data points (96.3%) fall within the ±30% deviation band.
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URN: https://sloi.org/urn:sl:tjoee103390
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