Numerical investigation of heat transfer enhancement in a pipe heat exchanger by adding nano particle and twisted tape

چکیده مقاله

In present study, the effect of adding twisted tape and nano particles are investigated in a pipe heat exchanger. The Reynolds number, nano particle volume fraction and tape width ratio changes between 500 to 1700, 0.01 to 0.03 and 0.5 to 0.8 respectively. The present results show good agreement with a published results. Results show that heat transfer increases by width ratio and nano particle concentration. The increment ratio is aproximately constant for each reynoldsc number but the ratio raises by increasing the width ratio.