Nowadays new passive methods to enhance the Critical Heat Flux (CHF) have been investigated for severalresearchers. Experiments using a novel and practical technique called High Porosity Sintered Fiber wereconducted, attaching this material on the heating surface under forced convection subcooled conditions. Theeffects of the porous thickness on the heat flux and flow aspect were analyzed and recorded using a highspeed camera. Three different of porous thickness (0.2,0.5, and 1 mm) and one bare surface (0mm) weretested. Experimental results show that using a porous surface can enhance the heat flux in almost 2 timesbetter than the bare surface under de same wall superheat ΔT_(sat) K conditions. Besides that, at high thicknessporosity, the CHF tends to reduce in comparison with the low thickness porosity. Bubble formation andpressure drop were also compared. The sintered fiber material is copper with a porosity of 86%.
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