Scopus
Effects of radius ratio on turbulent concentric annular pipe flow and structures
International Journal of Heat and Fluid Flow · Aralık 2020
Makale Bilgileri
DergiInternational Journal of Heat and Fluid Flow
Yayın TarihiAralık 2020
Cilt / Sayfa86
Scopus ID2-s2.0-85092495410
Özet
The effects of radius ratio on fully-developed turbulent concentric annular pipe flow and structures are investigated using direct numerical simulations (DNS). In order to study the radius ratio effects on the flow, four radius ratios of a concentric annular pipe (for Ri∕Ro=0.1–0.7) are compared at a fixed Reynolds number. Here, Ri and Ro are the radii of the inner and outer pipes, respectively. It is observed that the radius ratio influences the interaction of two boundary layers developed over the inner and outer cylinder surfaces, and has a significant impact on the turbulent flow structures and dynamics. The characteristics of the flow field are investigated in both physical and spectral spaces, which include the analyses of the first- and second-order statistical moments, budget balance of the transport equation of Reynolds shear stress, two-point correlation coefficients, and premultiplied spectra of velocity and vorticity fluctuations.
Yazarlar (2)
1
Edris Bagheri
ORCID: 0000-0003-0037-2667
2
Bing Chen Wang
Anahtar Kelimeler
Concentric annular pipe
Direct numerical simulation
Turbulence
Kurumlar
University of Manitoba
Winnipeg Canada
Metrikler
4
Atıf
2
Yazar
3
Anahtar Kelime