Thermal analysis of a metal foam subject to jet impingement

Wong, Kok Cheong

doi:10.1016/j.icheatmasstransfer.2012.05.021

Cited by 23 publications

(5 citation statements)

References 17 publications

(27 reference statements)

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“…Jets have been used for cooling metal surfaces [3,4], turbine blades [2], and electronic equipment [5,6], annealing and quenching of metals [2], boiling [7,8], atomization [9], as well as erosion of solid surfaces [10][11][12]. Apart from impermeable surfaces, jet impingement on permeable surfaces has found use in applications involving heat transfer from metal foams [13,14], boiling heat transfer [15], drying [16], and in incontinence products [17]. The phenomenon has been recently used to model astrophysical observations as well [18,19].…”

Section: Introductionmentioning

confidence: 99%

Orthogonal liquid-jet impingement on wettability-patterned impermeable substrates

et al. 2019

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Liquid jet impingement on flat, impermeable substrates is important for a multitude of applications, ranging from electronic equipment cooling, to fuel atomization, and erosion of solid surfaces. On a wettable surface, where a sufficient downstream liquid depth can be sustained after axisymmetric impingement, the jet forms a thin film on the substrate up to a radial distance where the film height suddenly increases, forming a hydraulic jump. On a superhydrophobic surface, where a downstream liquid depth is not naturally sustained, the thin film expands and breaks up into droplets, which are subsequently ejected in a random fashion outward, as carried by their radial momentum. In the present work, a facile, scalable, wettability-patterning approach is presented for delaying or even eliminating droplet breakup in the case of jet impingement on horizontal superhydrophobic surfaces. An analytical expression for predicting the hydraulic jump and droplet breakup locations is developed to designate the proper wettability patterns that facilitate alteration and control of the post-impingement liquid behavior. The axisymmetric model is extended to evaluate the radial variation of the competing forces responsible for film breakup, and a design criterion for the effective wettability patterns is proposed.

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Section: Introductionmentioning

confidence: 99%

Orthogonal liquid-jet impingement on wettability-patterned impermeable substrates

et al. 2019

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“…The orthogonal encounter of a high-momentum liquid jet by a horizontal substrate is a well-studied problem in fluid dynamics, being of practical interest in impinging jet heat transfer from heated solid substrates, , in boiling heat transfer, , and when studying the erosion of solid surfaces. − Apart from solid substrates, orthogonal jet impingement on porous materials has also been used for heat transfer, , boiling heat transfer, and drying …”

Section: Introductionmentioning

confidence: 99%

Surface-Wettability Patterning for Distributing High-Momentum Water Jets on Porous Polymeric Substrates

Sen

Chatterjee

Mahapatra

et al. 2018

ACS Appl. Mater. Interfaces

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Liquid jet impingement on porous materials is particularly important in many applications of heat transfer, filtration, or in incontinence products. Generally, it is desired that the liquid not penetrate the substrate at or near the point of jet impact, but rather be distributed over a wider area before reaching the back side. A facile wettability-patterning technique is presented, whereby a water jet impinging orthogonally on a wettability-patterned nonwoven substrate is distributed on the top surface and through the porous matrix, and ultimately dispensed from prespecified points underneath the sample. A systematic approach is adopted to identify the optimum design that allows for a uniform distribution of the liquid on horizontally mounted substrates of ∼50 cm area, with minimal or no spilling over the sample edges at jet flow rates exceeding 1 L/min. The effect of the location of jet impingement on liquid distribution is also studied, and the design is observed to perform well even under offset jet impact conditions.

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“…The results of Wong and Saeid further indicated that increasing the porosity of the metal foam can lead to higher values of Nusselt number. Later, Wong used a similar numerical setting in an experimental and numerical study of impinging flow on a porous block and demonstrated an overall similarity between the experimentally recorded and computationally predicted temperature fields [23].…”

Section: Introductionmentioning

confidence: 88%

Numerical study of nonlinear mixed convection inside stagnation-point flow over surface-reactive cylinder embedded in porous media

Hong

Alizadeh

Ardalan

et al. 2020

J Therm Anal Calorim

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Thermal analysis of a metal foam subject to jet impingement

Cited by 23 publications

References 17 publications

Orthogonal liquid-jet impingement on wettability-patterned impermeable substrates

Orthogonal liquid-jet impingement on wettability-patterned impermeable substrates

Surface-Wettability Patterning for Distributing High-Momentum Water Jets on Porous Polymeric Substrates

Numerical study of nonlinear mixed convection inside stagnation-point flow over surface-reactive cylinder embedded in porous media

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