TY - JOUR
T1 - Turbulent flow characteristics and heat transfer enhancement in a rectangular channel with elliptical cylinders and protrusions of various heights
AU - Xie, Gongnan
AU - Song, Yidan
AU - Simon, Terrence W.
N1 - Funding Information:
The authors wish to thank the National Natural Science Foundation of China (51676163), the Fundamental Research Funds of Shaanxi Province (2015KJXX-12).
Publisher Copyright:
© 2017 Taylor & Francis.
PY - 2017/9/17
Y1 - 2017/9/17
N2 - This numerical study investigates turbulent flow characteristics and heat transfer augmentation in a rectangular channel with elliptical cylinders and protrusions. The height of protrusions is changed to quantify interactions with surrounding elliptical cylinders. Flow structures, temperature distributions, and heat transfer characteristics are obtained with a standard k − ε turbulence closure model. Cases are run at Reynolds numbers of 15,000 and 20,000. Combinations of protrusion and elliptical cylinder geometries give higher heat transfer rates than a case without protrusions. Additionally, Nusselt numbers increase with increases in height of protrusions and an optimum height-to-footprint diameter ratio is found.
AB - This numerical study investigates turbulent flow characteristics and heat transfer augmentation in a rectangular channel with elliptical cylinders and protrusions. The height of protrusions is changed to quantify interactions with surrounding elliptical cylinders. Flow structures, temperature distributions, and heat transfer characteristics are obtained with a standard k − ε turbulence closure model. Cases are run at Reynolds numbers of 15,000 and 20,000. Combinations of protrusion and elliptical cylinder geometries give higher heat transfer rates than a case without protrusions. Additionally, Nusselt numbers increase with increases in height of protrusions and an optimum height-to-footprint diameter ratio is found.
UR - http://www.scopus.com/inward/record.url?scp=85031500258&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85031500258&partnerID=8YFLogxK
U2 - 10.1080/10407782.2017.1386507
DO - 10.1080/10407782.2017.1386507
M3 - Article
AN - SCOPUS:85031500258
SN - 1040-7782
VL - 72
SP - 417
EP - 432
JO - Numerical Heat Transfer; Part A: Applications
JF - Numerical Heat Transfer; Part A: Applications
IS - 6
ER -