HAN Huaizhi, LI Bingxi, HE Yurong, et al. Heat transfer and flow characteristics in asymmetrical outward convex corrugated tubes[J]. CIESC Journal, 2013, (6): 1916-1924.
HAN Huaizhi, LI Bingxi, HE Yurong, et al. Heat transfer and flow characteristics in asymmetrical outward convex corrugated tubes[J]. CIESC Journal, 2013, (6): 1916-1924.DOI: 10.3969/j.issn.0438-1157.2013.06.004.
A new style asymmetrical outward convex corrugated tube (ACT) was studied with numerical simulation based on the three-dimensional Reynolds stress transport (RST) model.The ACT is compared with the traditional symmetrical corrugated tube (SCT) to investigate their difference in flow and heat transfer characteristics.The calculation results from existing direct numerical simulation (DNS) are compared to those from RST model under the same condition to check the reliability of RST model for the corrugation tube.The calculation results for velocity and pressure coefficient at different profiles from RST and DNS are in good agreement.The fluid flow and heat transfer mechanism are investigated in the outward convex corrugated tube.Compared to SCT
ACT presents up to 32.3% higher overall heat transfer.