scholarly journals EXPERIMENTAL INVESTIGATION OF AIR–WATER TWO-PHASE FLOW REGIMES IN A HORIZONTAL WAVY MICRO-CHANNEL

2017 ◽  
Author(s):  
DOAA AWAD ◽  
ABDUL RAFEY SIDDIQUI ◽  
YASSER AL-HAMIDI ◽  
MOHAMMAD AZIZUR RAHMAN ◽  
IBRAHIM HASSAN
Keyword(s):  
Experimental Investigation ◽  
Two Phase Flow ◽  
Flow Regimes ◽  
Phase Flow ◽  
Micro Channel ◽  
Two Phase

scholarly journals Experimental investigation of air–water, two-phase flow regimes in vertical mini pipe

2011 ◽  
Vol 18 (4) ◽  
pp. 923-929 ◽  
Author(s):  
P. Hanafizadeh ◽  
M.H. Saidi ◽  
A. Nouri Gheimasi ◽  
S. Ghanbarzadeh
Keyword(s):  
Experimental Investigation ◽  
Two Phase Flow ◽  
Flow Regimes ◽  
Phase Flow ◽  
Two Phase

Experimental investigation on flow regimes and transitions of steam-water two-phase flow in narrow rectangular horizontal channels

2021 ◽  
Vol 131 ◽  
pp. 103601
Author(s):  
K. Zhang ◽  
Z.M. Zhu ◽  
B.J. Shang ◽  
G.L. Song ◽  
W.X. Tian ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Two Phase Flow ◽  
Flow Regimes ◽  
Phase Flow ◽  
Two Phase

Experimental Investigation and Empirical Correlations of Heat Transfer in Different Regimes of Air–Water Two-Phase Flow in a Horizontal Tube

2016 ◽  
Vol 9 (2) ◽  
Author(s):  
S. A. Nada
Keyword(s):  
Heat Transfer ◽  
Experimental Investigation ◽  
Reynolds Number ◽  
Heat Transfer Coefficient ◽  
Flow Rate ◽  
Two Phase Flow ◽  
Horizontal Tube ◽  
Flow Regimes ◽  
Phase Flow ◽  
Two Phase

This article reports on the experimental investigation of heat transfer to cocurrent air–water two-phase flow in a horizontal tube. The idea is to enhance heat transfer to the coolant liquid by air injection. Experiments were conducted for different air water ratios in constant temperature heated tube. Visual identification of flow regimes was supplemented. The effects of the liquid and gas superficial velocities and the flow regimes on the heat transfer coefficients were investigated. The results showed that the heat transfer coefficient generally increases with the increase of the injected air flow rate, and the enhancement is more significant at low water flow rates. A maximum value of the two-phase heat transfer coefficient was observed at the transition to wavy-annular flow as the air superficial Reynolds number increases for a fixed water flow rate. It was noticed that the Nusselt number increased about three times due to the injection of air at low water Reynolds number. Correlations for heat transfer by air–water two-phase flow were deduced in dimensionless form for different flow regimes.

AN EXPERIMENTAL INVESTIGATION INTO THE DYNAMICS OF TWO-PHASE FLOW IN VAPOUR GENERATORS

1978 ◽  
Author(s):  
C. D. Rakopoulos ◽  
A. A. El-Shirbini ◽  
W. Murgatroyd
Keyword(s):  
Experimental Investigation ◽  
Two Phase Flow ◽  
Phase Flow ◽  
Two Phase

Characterization of flow regimes in two phase flow using wavelet analysis

2018 ◽  
Author(s):  
Munzarin Morshed ◽  
Syed Imtiaz ◽  
Mohammad Aziz Rahman
Keyword(s):  
Wavelet Analysis ◽  
Two Phase Flow ◽  
Flow Regimes ◽  
Phase Flow ◽  
Two Phase

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

2003 ◽  
Author(s):  
Weilin Qu ◽  
Seok-Mann Yoon ◽  
Issam Mudawar
Keyword(s):  
Heat Transfer ◽  
Pressure Drop ◽  
Flow Pattern ◽  
Two Phase Flow ◽  
Flow Patterns ◽  
Heat Sinks ◽  
Phase Flow ◽  
Micro Channel ◽  
Two Phase ◽  
Micro Channels

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 × 2.032 mm 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 that 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. Annual flow is identified as the dominant flow pattern for conditions relevant to two-phase micro-channel heat sinks, and forms the basis for development of a theoretical model for both pressure drop and heat transfer in micro-channels. Features unique to two-phase micro-channel flow, such as laminar liquid and gas flows, smooth liquid-gas interface, and strong entrainment and deposition effects are incorporated into the model. The model shows good agreement with experimental data for water-cooled heat sinks.

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