TY - JOUR
T1 - Transient mixed convection in a channel with two facing discretely heated semicircular cavities
T2 - Buoyancy, inclination angle, and channel aspect ratio effects
AU - Pérez-Flores, Faustino
AU - Treviño, César
AU - Rosas, Israel Yescas
AU - Solorio, Francisco
AU - Martínez-Suástegui, Lorenzo
N1 - Publisher Copyright:
© 2018, © 2018 Taylor & Francis.
PY - 2019/7/4
Y1 - 2019/7/4
N2 - Space-averaged surface temperature distributions and overall Nusselt number measurements have been carried out to study the transient mixed convection heat transfer in a channel with two facing and symmetrically heated semicircular cavities. Effects of buoyancy, channel orientation, and channel aspect ratio on thermal behavior have been investigated from Re 500 to 1,500. Depending on the parametric set, steady, oscillatory, and irregular thermal regimes have been identified. The natural frequencies and time scales of the oscillatory regimes have been obtained using spectral analysis. Results show that with increase in channel aspect ratio, the heat transfer performance reduces for all inclination angles.
AB - Space-averaged surface temperature distributions and overall Nusselt number measurements have been carried out to study the transient mixed convection heat transfer in a channel with two facing and symmetrically heated semicircular cavities. Effects of buoyancy, channel orientation, and channel aspect ratio on thermal behavior have been investigated from Re 500 to 1,500. Depending on the parametric set, steady, oscillatory, and irregular thermal regimes have been identified. The natural frequencies and time scales of the oscillatory regimes have been obtained using spectral analysis. Results show that with increase in channel aspect ratio, the heat transfer performance reduces for all inclination angles.
KW - arc-shape cavity
KW - circular groove
KW - concave-wall boundary layer
KW - oscillatory flows
KW - three-dimensional heat transfer
UR - http://www.scopus.com/inward/record.url?scp=85053892711&partnerID=8YFLogxK
U2 - 10.1080/08916152.2018.1517836
DO - 10.1080/08916152.2018.1517836
M3 - Artículo
SN - 0891-6152
VL - 32
SP - 337
EP - 363
JO - Experimental Heat Transfer
JF - Experimental Heat Transfer
IS - 4
ER -