Abstract    [if gte mso 9]> In the present work, the thermal conductivity coefficients of nanoparticle-oil suspensions for two types of carbon nanotubes, single-walled (SWNTs) and multi-walled (MWNTs) carbon nanotubes at 0.1, 0.2 and 0.3 wt.% were measured by a modified transient hot wire method (KD2-pro thermal property meter). Results showed that the thermal conductivity of suspension containing single-walled carbon nanotubes is higher than that of suspension containing multi-walled carbon nanotubes. It was also observed that the thermal conductivity coefficients of both nanofluids increase with increasing temperature.

Keywords    CNTs, nanofluid, thermal conductivity

چکیده    درکار حاضر، ضرایب هدایت حرارتی سوسپانسیون های نانو ذره-روغن برای دو نوع نانو تیوب کربنی تک دیواره و چند دیواره در درصد های وزنی 1/0، 2/0 و3/0 با روش سیم داغ اصلاح شده (D2-pro thermal property meter) اندازه گیری شد. نتایج نشان داد که هدایت حرارتی سوسپانسیون حاوی نانو لوله های کربنی تک دیواره بیشتر از نانو لوله های کربنی چند دیواره است. همچنین مشاهده شد که ضرایب هدایت حرارتی هر دو نانو سیال با افزایش دما افزایش پیدا می کند..

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