scholarly journals Numerical Study on the Influence of a Swirling Flow Tundish on Multiphase Flow and Heat Transfer in Mold

Metals ◽  
2018 ◽  
Vol 8 (5) ◽  
pp. 368 ◽  
Author(s):  
Peiyuan Ni ◽  
Mikael Ersson ◽  
Lage Jonsson ◽  
Ting-an Zhang ◽  
Pär JÖNSSON
Keyword(s):  
Heat Transfer ◽  
Multiphase Flow ◽  
Swirling Flow ◽  
Numerical Study ◽  
Flow And Heat Transfer

A Numerical Study of the Flow and Heat Transfer Characteristics of Outward Convex Corrugated Tubes With Twisted-Tape Insert

2015 ◽  
Vol 138 (2) ◽  
Author(s):  
Longbin Yang ◽  
Huaizhi Han ◽  
Yanjun Li ◽  
Xiaoming Li
Keyword(s):  
Heat Transfer ◽  
Heat Transfer Performance ◽  
Swirling Flow ◽  
Numerical Study ◽  
Twisted Tape ◽  
Transfer Performance ◽  
Heat Transfer Characteristics ◽  
Corrugated Tube ◽  
Flow And Heat Transfer ◽  
Flow Heat

This work presents a mathematical model for simulating the swirling flow in an outward convex corrugated tube with twisted-tape insert (CT). The synergistic effect on the flow, heat transfer, and friction loss behaviors between the surface-based and fluid-based enhancements is numerically investigated. Renormalized group (RNG) k-ε turbulence model applied in our paper is verified by comparing with experimental results investigated by Manglik and Bergles. Comparisons of the CT and smooth tube with twisted-tape insert (ST) plots are confirmed to investigate the performance differences between them. When comparing the performance of the CT against the ST, the maximum ratio of Nusselt number (Nuc/Nus), ratio of friction factor (f/fs), and overall heat transfer performance (η) values realized in the CT are 1.36, 1.53, and 1.15 times higher, respectively, than the maximum values for those same variables in the ST.

scholarly journals Effect of swirling flow tundish submerged entry nozzle outlet design on multiphase flow and heat transfer in mould

2019 ◽  
Vol 46 (9) ◽  
pp. 911-920 ◽  
Author(s):  
Haitong Bai ◽  
Peiyuan Ni ◽  
Mikael Ersson ◽  
Tingan Zhang ◽  
Pär Göran Jönsson
Keyword(s):  
Heat Transfer ◽  
Multiphase Flow ◽  
Swirling Flow ◽  
Submerged Entry Nozzle ◽  
Nozzle Outlet ◽  
Flow And Heat Transfer

scholarly journals Effect of Immersion Depth of a Swirling Flow Tundish SEN on Multiphase Flow and Heat Transfer in Mold

Metals ◽  
2018 ◽  
Vol 8 (11) ◽  
pp. 910 ◽  
Author(s):  
Peiyuan Ni ◽  
Mikael Ersson ◽  
Lage Jonsson ◽  
Ting-An Zhang ◽  
Pär Jönsson
Keyword(s):  
Heat Transfer ◽  
Multiphase Flow ◽  
Solidification Front ◽  
Swirling Flow ◽  
Fluid Model ◽  
Submerged Entry Nozzle ◽  
Immersion Depth ◽  
Similar Distribution ◽  
Flow And Heat Transfer ◽  
Steel Flow

The effect of the immersion depth of a new swirling flow tundish SEN (Submerged Entry Nozzle) on the multiphase flow and heat transfer in a mold was studied using numerical simulation. The RSM (Reynolds Stress Model) and the VOF (Volume of Fluid) model were used to solve the steel and slag flow phenomena. The results show that the SEN immersion depth can significantly influence the steel flow near the meniscus. Specifically, an increase of the SEN immersion depth decreases the interfacial velocity, and this reduces the risk for the slag entrainment. The calculated Weber Number decreases from 0.8 to 0.2 when the SEN immersion depth increases from 15 cm to 25 cm. With a large SEN immersion depth, the steel flow velocity near the solidification front, which is below the mold level of SEN outlet, was increased. The temperature distribution has a similar distribution characteristic for different SEN immersion depths. The high temperature region is located near the solidification front. Temperature near the meniscus was slightly decreased when the SEN immersion depth was increased, due to an increased steel moving distance from the SEN outlet to the meniscus.

A Parametric Numerical Study of Fluid Flow and Heat Transfer in a Computer Chassis

2015 ◽  
Vol 9 (3) ◽  
pp. 242 ◽  
Author(s):  
Efstathios Kaloudis ◽  
Dimitris Siachos ◽  
Konstantinos Stefanos Nikas
Keyword(s):  
Heat Transfer ◽  
Fluid Flow ◽  
Numerical Study ◽  
Flow And Heat Transfer
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