Heat Transfer Characteristics of Hot Surface Using High Alcohol Surfactant by Impinging Liquid Jet

2016 ◽  
pp. 1653-1662
Author(s):  
Manish K. Agrawal ◽  
Mayank Modak ◽  
Santosh K. Sahu
Keyword(s):  
Heat Transfer ◽  
Liquid Jet ◽  
High Alcohol ◽  
Heat Transfer Characteristics ◽  
Transfer Characteristics ◽  
Hot Surface

Heat Transfer Characteristics of CuO-Water Nanofluids Jet Impingement on a Hot Surface

2016 ◽  
Author(s):  
Sandesh S. Chougule ◽  
Mayank Modak ◽  
Prajakta D. Gharge ◽  
S. K. Sahu
Keyword(s):  
Heat Transfer ◽  
Reynolds Number ◽  
Jet Impingement ◽  
Target Surface ◽  
Test Surface ◽  
Initial Surface ◽  
Heat Transfer Characteristics ◽  
Transfer Characteristics ◽  
Impingement Heat Transfer ◽  
Hot Surface

In present study, an experimental investigation has been carried out to analyze the heat transfer characteristics of CuO-water nanofluids jets on a hot surface. A rectangular stainless steel foil (AISI-304, 0.15 mm thick) is used as a test surface is electrically heated to obtain the required initial temperature. The distribution of heat flux on the target surface is evaluated from the recorded thermal images during transient cooling. The effect of nanoparticle concentration and Reynolds number of the nanofluids jet impingement heat transfer characteristics is studied. Tests were performed for an initial surface temperature of 500°C, Reynolds number (5000≤Re≤13000), CuO-water nanofluids concentration (Φ= 0.15%, 0.6%) and nozzle to plate distance was l/d= 4.

scholarly journals Flow and heat transfer characteristics of high temperature continuous rising bubbles

2021 ◽  
pp. 250-250
Author(s):  
Jiarui Xu ◽  
Xiaohui Zhang ◽  
Guangjun Zhang ◽  
Shan Qing
Keyword(s):  
Heat Transfer ◽  
High Temperature ◽  
Bubble Diameter ◽  
Initial Position ◽  
Bubble Velocity ◽  
Liquid Jet ◽  
Heat Transfer Characteristics ◽  
Transfer Characteristics ◽  
Flow And Heat Transfer ◽  
Bubble Movement

In the movement process of continuous bubbles, different liquid flow state and initial temperature of bubble shave important influence on bubble movement and heat transfer. In this study, the flow and heat transfer characteristics of high temperature bubbles in normal temperature liquid are investigated. The rising process of and temperature of bubbles are studied by numerical simulation and compared with experimental results for verification. The results show that the shape, velocity and temperature of the bubble are affected by the initial position of the bubble. Because the closer the initial position of the bubble is to the bottom of the cylinder, the greater decrease of the bubble aspect ratio (w*),the faster decrease of bubble temperature, and the larger bubble velocity would be. The increase of the bubble diameter would mitigate the influence of liquid jet on the bubble motion. Finally, as the bubble surface tension increases, the liquid jet would have less influence on the bubble movement.

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