Transient conjugated heat transfer in thermally developing laminar flow in thick walled pipes and minipipes with time periodically varying wall temperature boundary condition
Yazarlar (3)
Aziz H. Altun Necmettin Erbakan Üniversitesi, Türkiye
Şefik Bilir Selçuk Üniversitesi, Türkiye
Prof. Dr. Ali ATEŞ Selçuk Üniversitesi, Türkiye
Makale Türü Özgün Makale (SSCI, AHCI, SCI, SCI-Exp dergilerinde yayınlanan tam makale)
Dergi Adı International Journal of Heat and Mass Transfer (Q1)
Dergi ISSN 0017-9310 Dergi Bilgileri (2016)
Dergi Tarandığı Indeksler SCI
Makale Dili İngilizce Basım Tarihi 01-2016
Cilt / Sayı / Sayfa 92 / 1 / 643–657 DOI 10.1016/j.ijheatmasstransfer.2015.09.011
Makale Linki http://linkinghub.elsevier.com/retrieve/pii/S0017931015009485
UAK Araştırma Alanları
Isı Transferi
Özet
Transient conjugated heat transfer for thermally developing laminar flow in thick walled pipes is analyzed involving two-dimensional wall and axial fluid conduction. A two-regional, initially isothermal pipe is considered and the problem is handled for hydrodynamically developed flow with periodically time-varying outer wall temperature in the downstream region. The problem is solved numerically by a finite-difference method and a parametric study is done to analyse the effects of four defining parameters namely, wall thickness ratio, wall-to-fluid conductivity ratio, wall-to-fluid thermal diffusivity ratio, the Peclet number and also the effect of angular frequency. Considerable amount of heat is transferred through the upstream region due to both wall and fluid axial conduction. Heat transfer characteristics change periodically in time similar to the periodic change in the outer wall temperature. The results are found to be …
Anahtar Kelimeler
Conjugate heat transfer | Laminar flow heat transfer in pipes | Minipipes | Numerical solution | Periodic temperature variation | Transient heat transfer