Numerical investigation on flow pattern transformation and heat transfer characteristics of two-phase flow boiling in the shell side of LNG spiral wound heat exchanger

2020 ◽  
Vol 152 ◽  
pp. 106289 ◽  
Author(s):  
Jianrui Li ◽  
Haitao Hu ◽  
Haoxian Wang
Keyword(s):  
Heat Transfer ◽  
Heat Exchanger ◽  
Flow Pattern ◽  
Numerical Investigation ◽  
Flow Boiling ◽  
Phase Flow ◽  
Heat Transfer Characteristics ◽  
Shell Side ◽  
Two Phase ◽  
Pattern Transformation

Two-Phase Flow and Heat Transfer in Rectangular Micro-Channels

2004 ◽  
Vol 126 (3) ◽  
pp. 288-300 ◽  
Author(s):  
Weilin Qu ◽  
Seok-Mann Yoon ◽  
Issam Mudawar
Keyword(s):  
Heat Transfer ◽  
Pressure Drop ◽  
Flow Pattern ◽  
Two Phase Flow ◽  
Flow Boiling ◽  
Flow Patterns ◽  
Heat Sinks ◽  
Phase Flow ◽  
Micro Channel ◽  
Two Phase

Knowledge of flow pattern and flow pattern transitions is essential to the development of reliable predictive tools for pressure drop and heat transfer in two-phase micro-channel heat sinks. In the present study, experiments were conducted with adiabatic nitrogen-water two-phase flow in a rectangular micro-channel having a 0.406×2.032mm2 cross-section. Superficial velocities of nitrogen and water ranged from 0.08 to 81.92 m/s and 0.04 to 10.24 m/s, respectively. Flow patterns were first identified using high-speed video imaging, and still photos were then taken for representative patterns. Results reveal the dominant flow patterns are slug and annular, with bubbly flow occurring only occasionally; stratified and churn flow were never observed. A flow pattern map was constructed and compared with previous maps and predictions of flow pattern transition models. Features unique to two-phase micro-channel flow were identified and employed to validate key assumptions of an annular flow boiling model that was previously developed to predict pressure drop and heat transfer in two-phase micro-channel heat sinks. This earlier model was modified based on new findings from the adiabatic two-phase flow study. The modified model shows good agreement with experimental data for water-cooled heat sinks.

Numerical investigation of EHD effects on heat transfer enhancement and flow pattern of R-134a two phase flow

2016 ◽  
Vol 82 ◽  
pp. 63-71 ◽  
Author(s):  
Pedram Hanafizadeh ◽  
Mahla Gharahasanlo ◽  
Sadegh Ahmadi ◽  
Shahab Zeraati ◽  
M.A. Akhavan-Behabadi
Keyword(s):  
Heat Transfer ◽  
Heat Transfer Enhancement ◽  
Flow Pattern ◽  
Numerical Investigation ◽  
Two Phase Flow ◽  
Phase Flow ◽  
Transfer Enhancement ◽  
Two Phase ◽  
R 134A
Sign in / Sign up

Export Citation Format

Share Document