Numerical study and optimisation of the boiling of refrigerant in a vertical corrugated tube using vapour phase tracking

2021 ◽  
pp. 122116
Author(s):  
Mehrdad Mesgarpour ◽  
Rasool Alizadeh ◽  
Omid Mahian ◽  
Ahmet Selim Dalkılıç ◽  
Ho Seon Ahn ◽  
...  
Keyword(s):  
Numerical Study ◽  
Vapour Phase ◽  
Phase Tracking ◽  
Corrugated Tube

Heat transfer enhancement in three-start spirally corrugated tube: Experimental and numerical study

2015 ◽  
Vol 134 ◽  
pp. 746-757 ◽  
Author(s):  
Zaid S. Kareem ◽  
Shahrir Abdullah ◽  
Tholudin M. Lazim ◽  
M.N. Mohd Jaafar ◽  
Ammar F. Abdul Wahid
Keyword(s):  
Heat Transfer ◽  
Heat Transfer Enhancement ◽  
Numerical Study ◽  
Transfer Enhancement ◽  
Corrugated Tube

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.

The latent heat recovery from boiler exhaust flue gas using shell and corrugated tube heat exchanger: A numerical study

Heat Transfer ◽  
2020 ◽  
Vol 49 (6) ◽  
pp. 3797-3815 ◽  
Author(s):  
Sharare Mohammadi ◽  
Seyed Soheil Mousavi Ajarostaghi ◽  
Mohsen Pourfallah
Keyword(s):  
Heat Exchanger ◽  
Latent Heat ◽  
Flue Gas ◽  
Heat Recovery ◽  
Numerical Study ◽  
Tube Heat Exchanger ◽  
Corrugated Tube

scholarly journals Numerical study on the influencing mechanism of twisted ratio in outward convex corrugated tubes with a twisted tape insert

2018 ◽  
Vol 22 (Suppl. 2) ◽  
pp. 577-584
Author(s):  
Huaizhi Han ◽  
Longbin Yang ◽  
Yiran Hu ◽  
Ruitian Yu ◽  
Qun Zhang
Keyword(s):  
Heat Transfer ◽  
Thermal Performance ◽  
Numerical Study ◽  
Twisted Tape ◽  
High Twist ◽  
Numerical Investigations ◽  
Corrugated Tube ◽  
Influencing Mechanism ◽  
Flow And Heat Transfer ◽  
Twist Ratio

Numerical investigations were conducted on flow and heat transfer in an outward convex corrugated tube with various structural twisted tape inserts. The study investigated the influence of twisted ratio on thermodynamic regulation and mechanism in the corrugated tube. The results indicate that Nusselt number in the corrugated tube (Nuc) exceeds those in the corrugated tube and smooth tube by 120-136% and 171-317%, respectively. Meanwhile, the friction factor increases by 148-153% and 476-514%, respectively. The best overall thermal performance (h = 1.97) is obtained with a high twist ratio (y/w = 5). However, the highest thermal performance (Nuc/Nus = 4.78) is obtained with the lowest twist ratio (y/w = 1.25).

Numerical Study of Laminar Flow and Heat Transfer Characteristic in Wave Tubes Based on Sine Curve

2011 ◽  
Vol 322 ◽  
pp. 349-352
Author(s):  
Zheng Ming Tong ◽  
Kai Zhu ◽  
Jia Lei Lu ◽  
Gen Li
Keyword(s):  
Heat Transfer ◽  
Flow Resistance ◽  
Numerical Study ◽  
Transfer Characteristic ◽  
Flow State ◽  
Field Synergy Principle ◽  
Corrugated Tube ◽  
Flow And Heat Transfer ◽  
New Type ◽  
Computational Fluid Dynamics Cfd

A new type of corrugated tube based on sine function is proposed by introducing a parameter of sine camber in this paper. Computational Fluid Dynamics (CFD) was used to analysis flow state and sine camber of tube influence on the heat transfer and flow. The heat transfer and flow around sinusoidal corrugated tubes with different sine camber e are investigated. According to the numerical calculus result, correlation equations of Nu (Nusselt) =f(Re) is given. At last, the theoretical comparative analysis with field synergy principle is carried out for the heat transfer and flow resistance in smooth tube and sinusoidal corrugated tube.

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