Parası kalmadığı için otobüse binemiyordur ailesi porno izle ona daha yeni para gönderdiği için tekrar porno istemeye utanınca mecburen otostop çekmek için youporn çantasını alarak yol kenarına gelir etekli porno liseli türk kız yol kenarında dururken yanına yaklaşan porno kibar bir gencin onu gideceği yere kadar bırakmak porno izle istemesine çok mutlu olur arabaya bindiklerinde gideceği yer ile porno arabayı kullanan adamın gittiği yer arasında çok mesafe sex izle farkı olduğunu anlayan türk kız bu yaptığı porno indir iyilik karşısında arabada ona memelerini açar porno sapıklaşan adam yol kenarındaki hotelde durarak porno izle üniversiteli otostop çeken türk kızına odada sakso çektirip sikerAugmentation of Heat Transfer Performance With Aluminium And Copper Twisted Tape Inserts| Abstract

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Abstract

Augmentation of Heat Transfer Performance With Aluminium And Copper Twisted Tape Inserts

Author(s): K. SIVAKUMAR, K. RAJAN, S. MURALI, S. PRAKASH, V. THANIGAIVEL and T. SURYAKUMAR

An experimental investigation of heat transfer, friction factor and pressure drop characteristics in a pipe fitted with the Al twisted tape and cu twisted tape inserts with different twist ratio. The experimental work was conducted and the analysis of heat transfer was investigated with laminar flow. The experimental data were obtained from the double pipe heat exchanger with concentric tube fitted with insert of aluminium and copper material twisted tape inserts. The results of the Al and cu were investigated and compared these two results. The results shows that the heat transfer enhanced in the copper material inserts compared to Aluminium material inserts. The heat transfer augmentation was enhanced with 1.1 to 1.3 times compared to the Aluminium. The experimental results reveal that the different material of inserts. The Reynolds number various from 2570 to7891. The twist ratio of both the material is y = 4.3.


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