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Dear all, I am using a polymer thin film which shows a high contact angle, high surface energy when i took a XPS spectrum it shows a low F:C ratio which means the high contact angle might be contributed from the roughness. But still i couldnt correlate how could the surface energy be...

Sorry, i forgot to mention that I am using a forced liquid coolant in the duct. And i can go upto flow velocity of 1m/s. The results i gave in my last posting are taking for the flow velicity of 0.5m/s. PZas, Thank you for that motivating suggestion...i will go ahead. Takecare of your...

Hi all, sorry Pzas, i was out of that topic for long time. I have calculated the resistance in the channel heat sink with the following dimensions: Fin thickness=1.07mm Length of heatsink=30mm width of heat sink=15mm Base thickness=0.8mm fin heigth =1mm number of fins=12 with Aspect...

Thank you to all who have replied, So i could see from all your answers the general resistance on fins equation assume that thermal conductivity of the material used to make the fin is small compared to the convective transfer coefficient. So i could understand that it is just an assumption. But...

Dear all, I am working on a liquid cooling system and have to deal with resistance on base,fins and fluid flow. I found the traditionally used equation for fin resistance doesnt have any dependance on fin materials thermal conductivity. Isit that if i use a plastic fin which has a very...