Droplet impact dynamics and heat transfer on nanostructured doubly reentrant cavity under freezing temperature

2021 ◽  
Vol 33 (5) ◽  
pp. 052005
Author(s):  
Dong Liao ◽  
Yinchuang Yang ◽  
Huihe Qiu
Keyword(s):  
Heat Transfer ◽  
Freezing Temperature ◽  
Droplet Impact ◽  
Impact Dynamics

scholarly journals Droplet impact dynamics on micropillared hydrophobic surfaces

2016 ◽  
Vol 74 ◽  
pp. 195-206 ◽  
Author(s):  
Nagesh D. Patil ◽  
Rajneesh Bhardwaj ◽  
Atul Sharma
Keyword(s):  
Droplet Impact ◽  
Impact Dynamics ◽  
Hydrophobic Surfaces

Preparation and droplet impact dynamics of superhydrophobic nano-aluminum films on metal substrates

2018 ◽  
Vol 53 (7) ◽  
pp. 5364-5379 ◽  
Author(s):  
Zhe Xu ◽  
Deyi Jiang ◽  
Fei Wu ◽  
Xiaogang Guo ◽  
Zhibo Wei ◽  
...  
Keyword(s):  
Droplet Impact ◽  
Impact Dynamics ◽  
Metal Substrates ◽  
Aluminum Films

Natural Convection Heat Transfer in Horizontal Cylindrical Cavities: A Computational Fluid Dynamics (CFD) Investigation

2013 ◽  
Author(s):  
Daniele Ludovisi ◽  
Ivo A. Garza
Keyword(s):  
Heat Transfer ◽  
Natural Convection ◽  
Power Plants ◽  
Convection Heat Transfer ◽  
Weather Conditions ◽  
Freezing Temperature ◽  
Cold Weather ◽  
Pipe Surface ◽  
Cfd Models ◽  
Different Diameters

Many processes in power plants involve the storage and transfer of fluids including water in outdoor pipelines. Under extreme cold weather conditions, water can freeze if allowed to cool down to the freezing temperature. Installing insulation and maintaining adequate flow rate can sometimes prevent problems. However, during extended non-processing times, there are circumstances where cool down cannot be avoided and heat tracing along the piping becomes a necessity. In many instances, the need for the installation of heat tracing is simply determined based on pipe size. However, by performing accurate calculations, it is possible to determine if the need for heat tracing is real or not, thus saving on installation and maintenance costs. Correlations for the estimation of the heat transfer coefficient in horizontal cavities are not sufficiently documented in literature. In the present work, two-dimensional CFD models are used to investigate the natural convection in water-filled horizontal pipes of different diameters. The analysis has been carried out based on the assumption of a uniform pipe surface temperature. The Nusselt number is estimated as a function of the Rayleigh number and shown not to be strongly dependent on the Prandtl number. The analysis and the results of the numerical investigation are presented and compared to experimental data and other correlations available in literature. The documented correlation has an expanded range of applicability to high and low Rayleigh numbers, is supported by numerical and experimental results and is expressed in a simple form.

A comparative study of droplet impact dynamics on a dual-scaled superhydrophobic surface and lotus leaf

2011 ◽  
Vol 257 (21) ◽  
pp. 8857-8863 ◽  
Author(s):  
Longquan Chen ◽  
Zhiyong Xiao ◽  
Philip C.H. Chan ◽  
Yi-Kuen Lee ◽  
Zhigang Li
Keyword(s):  
Comparative Study ◽  
Superhydrophobic Surface ◽  
Droplet Impact ◽  
Impact Dynamics ◽  
Lotus Leaf

Droplet impact dynamics on an aluminum spinning disk

2021 ◽  
Vol 33 (7) ◽  
pp. 072103
Author(s):  
Sara Moghtadernejad ◽  
Mehdi Jadidi ◽  
Zachary Johnson ◽  
Thomas Stolpe ◽  
Jack Hanson
Keyword(s):  
Droplet Impact ◽  
Impact Dynamics ◽  
Spinning Disk
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