TY - JOUR ID - TI - THE EFFECT OF FIN'S HEIGHT AND CIRCULAR PERFORATED ON THE NATURAL CONVECTION OF THE VERTICAL RECTANGULAR FINS AU - Ali A. F. Al-Hamadani AU - Khaleel Saleem Jebur Ogaili AU - Ahmed A. Y. Al-Waaly PY - 2017 VL - 10 IS - 4 SP - 565 EP - 573 JO - Al-Qadisiyah Journal for Engineering Sciences مجلة القادسية للعلوم الهندسية SN - 19984456 24117773 AB - The safe operation of any device is necessary, but it requires a suitable condition such as dissipated the heat generated. A heat sink with vertical rectangular fins was improved using a circular perforated with diameter of 6mm for different fins height 6 cm, 8 cm and 10 cm. An experimental study was conducted to investigate the effect of circular perforated on the natural convection heat transfer of a vertical rectangular fin. Different numbers of circular perforated 2, 3 and 5 were studied. The results showed that the heat transfer for the height 6cm is higher as compared with 8cm and 10 cm. Moreover, the coefficient of heat transfer increases with the increased of the number of the circular perforation. For the fin height 6cm with five circular perforated, the heat transfer coefficient of the natural convection is 30 W/m2 oC.

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