Journals / Politeknik Dergisi / 2026 / Cilt: 7 Sayı: 1

STUDY OF SIMULTANEOUSLY DEVELOPING FLOW AND TEMPERATURE FIELD IN RECTANGULAR DUCTS WITH CONSTANT WALL TEMPERATURE

DİKDÖRTGEN KESİTLİ KANALLARDA SABİT DUVAR SICAKLIĞINDA EŞZMANLI GELİŞEN AKIŞIN ISI TRANSFERİNİN İNCELENMESİ

Pages
13–21
Publication Date
2004-03-01
DOI
—
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

Accuracy of the analysis was confirmed by comparing the fully developed Nusselt numbers obtained in this study with the literature

📌 3 Key Takeaways

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Objective & Hypothesis:In this research, the heat transfer and flow friction characteristics of hydrodynamically and thermally developing flows at the entrance of rectangular ducts have been theoretically studied.
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Key Findings & Data:Numerical results were presented for channels with 1/3, 2/3 and 3/3 aspect ratio and range of Reynolds number 250 ≤ Re ≤ 2250.
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Conclusion & Impact:Accuracy of the analysis was confirmed by comparing the fully developed Nusselt numbers obtained in this study with the literature
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Kompakt ısı değiştiricileri · Dikdörtgen kanallarda laminer akış · Giriş bölgesi akışı

Abstract

In this research, the heat transfer and flow friction characteristics of hydrodynamically and thermally developing flows at the entrance of rectangular ducts have been theoretically studied. In calculating components of velocity, parabolic momentum equations were used. Temperature field was also determined using parabolic form of energy equation. Besides, pressure distribution was calculated by means of a Poisson equation, which is obtained from combination of momentum and continuity equations. In numerical solution of finite difference equations, Newton-Raphson method was used. Numerical results were presented for channels with 1/3, 2/3 and 3/3 aspect ratio and range of Reynolds number 250 ≤ Re ≤ 2250. Accuracy of the analysis was confirmed by comparing the fully developed Nusselt numbers obtained in this study with the literature

Özet

Bu çalışmada dikdörtgen kanalların girişinde hidrodinamik ve termal yönden gelişmekte olan akışın akış ve ısı transferi karakteristikleri teorik olarak incelenmiştir. Hız bileşenlerinin hesaplanmasında parabolik momentum denklemleri kullanılmıştır. Sıcaklık dağılımın belirlenmesinde ise enerji denkleminin parabolik biçimi kullanılmıştır. Basınç dağılımı, süreklilik ve momentum denklemlerinden elde edilen Poission denklemi yardımı ile belirlenmiştir. Sonlu fark denklemlerinin sayısal çözümlemelerinde Newton-Raphson metodu kullanılmıştır. Sayısal sonuçlar Reynold sayısının 250 ≤ R e≤ 2250 aralığında 1/3, 2/3 ve 3/3 kenar oranları için verilmiştir. Analizin doğruluğu literatürden elde edilen tam gelişmiş akışın Nusselt sayıları ile kıyaslanarak sağlanmıştır.

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Cite This Article

Karabulut, H., Yücesu, H. S. (2004). STUDY OF SIMULTANEOUSLY DEVELOPING FLOW AND TEMPERATURE FIELD IN RECTANGULAR DUCTS WITH CONSTANT WALL TEMPERATURE. Politeknik Dergisi, Cilt: 7 Sayı: 1, 13–21. https://ajindex.com/articles/422390

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