High speed flow visualization of pool boiling from structured tubular heat transfer surfaces

2002 ◽  
Vol 25 (7) ◽  
pp. 547-555 ◽  
Author(s):  
Rudi Kulenovic ◽  
Rainer Mertz ◽  
Manfred Groll
Keyword(s):  
Heat Transfer ◽  
Flow Visualization ◽  
High Speed ◽  
Pool Boiling ◽  
High Speed Flow ◽  
Speed Flow

Subcooled Flow Boiling on Micro-Porous Structured Copper Surface in a Vertical Mini-Gap Channel

2019 ◽  
Author(s):  
Junye Li ◽  
Kan Zhou ◽  
Wei Li
Keyword(s):  
Heat Transfer ◽  
High Speed ◽  
Flow Boiling ◽  
Copper Surface ◽  
Heat Fluxes ◽  
High Speed Flow ◽  
Subcooled Flow Boiling ◽  
Mass Fluxes ◽  
Speed Flow ◽  
Subcooled Flow

Abstract An experimental investigation of subcooled flow boiling in a large width-to-height-ratio, one-sided heating rectangular mini-gap channel was conducted with deionized water as the working fluid. The super-hydrophobicity micro-porous structured copper surface was utilized in the experiments. High speed flow visualization was conducted to illustrate the effects of heat flux and mass rate on the heat transfer coefficient and flow pattern on the surfaces. The mass fluxes were in the range of 200–500 kg/m2s, the wall heat fluxes were spanned from 40–400 kW/m2. With increments of imposed heat flux, the slopes of boiling curves for superhydrophobic micro-porous copper surfaces increased rapidly, indicating the Onset of Nucleate Boiling. Heat transfer characteristics were discussed with variation of heat fluxes and mass fluxes, the trends of which were analyzed with the aid of high speed flow visualization.

Quantification of turbulence in cryogenic liquid using high speed flow visualization

2016 ◽  
Vol 42 ◽  
pp. 70-81 ◽  
Author(s):  
Nirupama Gopalaswami ◽  
Delphine M. Laboureur ◽  
Ray A. Mentzer ◽  
M. Sam Mannan
Keyword(s):  
Flow Visualization ◽  
High Speed ◽  
Cryogenic Liquid ◽  
High Speed Flow ◽  
Speed Flow
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