Boru demeti üzerinden geçen Al2O3- su nanoakışkanın pulsatif akışının ısı transferine etkisi

Selma Akcay; Ünal Akdağ; Oktay Hacıhafızoğu; Doğan Demiral

doi:10.24012/dumf.435490

Boru demeti üzerinden geçen Al2O3- su nanoakışkanın pulsatif akışının ısı transferine etkisi

Öz

Bu çalışmada, sabit duvar sıcaklığına sahip boru demetleri üzerinden geçen Al₂O₃-su nanoakışkanın laminer pulsatif akışının ısı transferine ve sürtünme faktörüne etkileri sayısal olarak incelenmiştir. Çalışmada, dairesel kesitli borular kademeli olarak yerleştirilmiş ve analizler iki boyutlu olarak gerçekleştirilmiştir. Kullanılan eşitlikler, sonlu hacimler metodu ile SIMPLE algoritması kullanılarak çözülmüştür. Sayısal incelemelerde, nanoakışkan tipi ve partikül hacim oranı sabit tutulmuş olup, analizler Reynolds sayısının sabit bir değeri için pulsatif parametrelerin değiştirilmesi ile elde edilmiştir. Bu parametrelerin ısı transferi karakteristiği ve sürtünme faktörü üzerindeki etkileri daimi akış şartları ile karşılaştırılmıştır. Boru demeti üzerinden pulsatif akışta anlık hız ve sıcaklık dağılımları elde edilmiştir. Sayısal sonuçlar, ısı transferindeki iyileşmenin pulsatif parametrelerden oldukça etkilendiğini göstermiştir. Pulsatif genlik ve frekans arttıkça ısı transferinin de arttığı, ancak bu artışın sürtünme faktöründe de bir miktar artışa sebep olduğu gözlemlenmiştir. Çalışma sonucunda boru demetleri üzerinden nanoakışkanların pulsatif akışı için en iyi termo-hidrolik performansı sağlayan parametreler belirlenmiştir. Sonuçlar boyutsuz parametrelerin bir fonksiyonu olarak verilmiştir.

Anahtar Kelimeler

Boru demeti; Pulsatif akış; Nanoakışkanlar; Isı transferi; Sayısal çalışma

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Details

Primary Language

Turkish

Subjects

-

Journal Section

Research Article

Authors

Selma Akcay ^*
0000-0003-2654-0702
Türkiye

Ünal Akdağ
0000-0002-1149-7425
Türkiye

Oktay Hacıhafızoğu
0000-0002-6487-5223
Türkiye

Doğan Demiral
0000-0001-9738-7632
Türkiye

Publication Date

June 20, 2019

Submission Date

June 21, 2018

Acceptance Date

October 22, 2018

Published in Issue

Year 2019 Volume: 10 Number: 2

DOI

https://doi.org/10.24012/dumf.435490

IZ

https://izlik.org/JA47KP28FU

Cite

RIS / Bibtex

IEEE

[1]S. Akcay, Ü. Akdağ, O. Hacıhafızoğu, and D. Demiral, “Boru demeti üzerinden geçen Al2O3- su nanoakışkanın pulsatif akışının ısı transferine etkisi”, DUJE, vol. 10, no. 2, pp. 621–631, June 2019, doi: 10.24012/dumf.435490.

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