Effect of pipe flattening on pressure drop in vapor core and thermal characteristic of miniature round and flat-shape heat pipe with sintered fiber wick

•Numerical model for thermal resistance has been verified with the experimental results. Two different methods are used to evaluate the pressure drop and thermal resistance, i.e., ESDU79012 and Darcy-Weisbach equation.•The thermal resistance in vapor core needs to be considered in the miniature heat...

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