Analysis of Impinging and Countercurrent Stagnating Flows By Reynolds Stress Model  

Oleh:

Kim, Kwang-Yong ; Im, Yong H. ; Huh, Kang Y.

Jenis: Article from Bulletin/Magazine
Dalam koleksi: Journal of Fluids Engineering vol. 124 no. 3 (2002), page 706-718.
Topik: MODELS OF MEMORY; impinging; countercurrent; stagnating flows; reynolds stress model

Ketersediaan

Perpustakaan Pusat (Semanggi) Nomor Panggil: JJ89.3 Non-tandon: 1 (dapat dipinjam: 0) Tandon: tidak ada

Lihat Detail Induk

Isi artikel

Numerical simulation is performed for stagnating turbulent flows of impinging and countercurrent jets by the Reynolds stress model (RSM). Results are compared with those of the k – E model and available data to assess the flow characteristics and turbulence models. Three variants of the RSM tested are those of Gibson and Launder (GL), Craft and Launder (GL - CL) and Speziale, Sarkar and Gatski (SSG). As is well known, the k – E model significantly overestimates turbulent kinetic energy near the wall. Although the RSM is superior to the k – E model, it shows considerable difference according to how the redistributive pressure - strain term is modeled. Results of the RSM for countercurrent jets are improved with the modified coefficients for the dissipation rate, C(e1) and C(e2), suggested by Champion and Libby. Anisotropic states of the stress near the stagnation region are assessed in terms of an anisotropy invariant map (AIM).

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