Numerical Study on the Saturated Flow Boiling of Methane in Vertical Pipe

2021 ◽  
Vol 33 (6) ◽  
pp. 1429-1436
Author(s):  
Da-Hye HWANG ◽  
Tae-Woo LIM ◽  
Yong-Seok CHOI
Keyword(s):  
Numerical Study ◽  
Flow Boiling ◽  
Vertical Pipe ◽  
Saturated Flow

Numerical Study of the Effect of Inlet Constriction on Bubble Growth During Flow Boiling in Microchannels

2005 ◽  
Author(s):  
Abhijit Mukherjee ◽  
Satish G. Kandlikar
Keyword(s):  
Stokes Equations ◽  
Numerical Study ◽  
Flow Boiling ◽  
Navier Stokes ◽  
Channel Cross Section ◽  
Vapor Bubbles ◽  
Reversed Flow ◽  
Cross Sectional ◽  
Parallel Microchannels ◽  
Energy Equations

Flow boiling through microchannels is characterized by nucleation of vapor bubbles on the channel walls and their rapid growth as they fill the entire channel cross-section. In parallel microchannels connected through a common header, formation of vapor bubbles often results in flow maldistribution that leads to reversed flow in certain channels. The reversed flow is detrimental to the heat transfer and leads to early CHF condition. One way of eliminating the reversed flow is to incorporate flow restrictions at the channel inlet. In the present numerical study, a nucleating vapor bubble placed near the restricted end of a microchannel is numerically simulated. The complete Navier-Stokes equations along with continuity and energy equations are solved using the SIMPLER method. The liquid-vapor interface is captured using the level set technique. The results show that with no restriction the bubble moves towards the nearest channel outlet, whereas in the presence of a restriction, the bubble moves towards the distant but unrestricted end. It is proposed that channels with increasing cross-sectional area may be used to promote unidirectional growth of the vapor plugs and prevent reversed flow.

3-D numerical study of subcooled flow boiling in a horizontal rectangular mini-channel by VOSET

2021 ◽  
pp. 122218
Author(s):  
Yu-Jie Chen ◽  
Kong Ling ◽  
Hao Ding ◽  
Yun Wang ◽  
Shu-Qi Jin ◽  
...  
Keyword(s):  
Numerical Study ◽  
Flow Boiling ◽  
Subcooled Flow Boiling ◽  
Subcooled Flow
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