Computation of Flow and Heat Transfer in Two-Pass Channels With 60 Deg Ribs  

Oleh:

Jang, Yong-Jun ; Chen, Hamn-Ching ; Han, Je-Chin

Jenis: Article from Bulletin/Magazine
Dalam koleksi: Journal of Heat Transfer vol. 123 no. 3 (Jun. 2001), page 563-575.
Topik: computational; computation of flow; heat transfer; two - pass channels; 60 deg ribs

Ketersediaan

Perpustakaan Pusat (Semanggi) Nomor Panggil: JJ90.4 Non-tandon: 1 (dapat dipinjam: 0) Tandon: tidak ada

Lihat Detail Induk

Isi artikel

Numerical predictions of three - dimensional flow and heat transfer are presented for a two - pass square channel with and without 60 deg angled parallel ribs. Square sectioned ribs were employed along one side surface. The rib height-to-hydraulic diameter ratio (e / D(h)) is 0.125 and the rib pitch - to - height ratio (P / e) is 10. The computation results were compared with the experimental data of Ekkad and Han [1] at a Reynolds number (Re) of 30,000. A multi - block numerical method was used with a chimera domain decomposition technique. The finite analytic method solved the Reynolds - Averaged Navier Stokes equation in conjunction with a near - wall second - order Reynolds stress (second-moment) closure model, and a two - layer k - E isotropic eddy viscosity model. Comparing the second - moment and two - layer calculations with the experimental data clearly demonstrated that the angled rib turbulators and the 180 deg sharp turn of the channel produced strong non - isotropic turbulence and heat fluxes, which significantly affected the flow fields and heat transfer coefficients. The near - wall second - moment closure model provides an improved heat transfer prediction in comparison with the k - E model.

Opini Anda

Klik untuk menuliskan opini Anda tentang koleksi ini!

Kembali