Analysis of Heat Transfer and Pressure Drop Through Idealized Open Cell Ceramic Foams: Comparison Between Kelvin and Weaire-Phelan Cell Structures

2013 ◽  
Author(s):  
N. Bianco ◽  
S. Cunsolo ◽  
W. K. S. Chiu ◽  
V. Naso ◽  
A. Migliozzi ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Pressure Drop ◽  
Open Source Software ◽  
Surface Evolver ◽  
Open Cell ◽  
Ceramic Foams ◽  
Cell Structures ◽  
Cell Architecture ◽  
Cell Dimensions ◽  
Open Cell Foams

In the applications of metal foams, the knowledge of the thermal transport properties is of primary importance. Thermal properties of a foam heavily depend on its microstructure. However, the influence of some geometric characteristics of the foam cells on their properties is far from being understood. Foam models are promising tools to study the above said effects. The effect of the cell architecture on heat transfer and pressure drop in open cell foams is investigated numerically using two foam models. The Kelvin and the Weaire-Phelan foam models are developed in an open source software “Surface Evolver”. Heat transfer and pressure drop in samples with different porosities and cell dimensions are studied using COMSOL® Multiphysics. Finally, a comparison between the numerical results obtained from two foam models is carried out in order to evaluate the feasibility to substitute the Weaire-Phelan foam structure, which is more complex and computationally heavier, with the simpler Kelvin foam representation.

Cost-Efficient Aluminum Open-Cell Foams: Manufacture, Characterization, and Heat Transfer Measurements

2018 ◽  
Vol 20 (8) ◽  
pp. 1701032 ◽  
Author(s):  
Michele Monno ◽  
Daniela Negri ◽  
Valerio Mussi ◽  
Pedram Aghaei ◽  
Gianpiero Groppi ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Open Cell ◽  
Open Cell Foams ◽  
Cost Efficient

Elastic Wave Propagation in Open-Cell Foams

2019 ◽  
Vol 86 (5) ◽  
Author(s):  
Alireza Bayat ◽  
Stavros Gaitanaros
Keyword(s):  
Wave Propagation ◽  
Elastic Wave ◽  
Finite Size ◽  
Bloch Wave ◽  
Elastic Wave Propagation ◽  
Surface Evolver ◽  
Dynamic Simulations ◽  
Element Analysis ◽  
Open Cell ◽  
Open Cell Foams

This work examines elastic wave propagation phenomena in open-cell foams with the use of the Bloch wave method and finite element analysis. Random foam topologies are generated with the Surface Evolver and subsequently meshed with Timoshenko beam elements, creating open-cell foam models. Convergence studies on band diagrams of different domain sizes indicate that a representative volume element (RVE) consists of at least 83 cells. Wave directionality and energy flow features are investigated by extracting phase and group velocity plots. Explicit dynamic simulations are performed on finite size domains of the considered foam structure to validate the RVE results. The effect of topological disorder is studied in detail, and excellent agreement is found between the wave behavior of the random foam and that of both the regular and perturbed Kelvin foams in the low-frequency regime. In higher modes and frequencies, however, as the wavelengths become smaller, disorder has a significant effect and the deviation between regular and random foam increases significantly.

Microtomography-Based Analysis of Pressure Drop and Heat Transfer Through Open Cell Metal Foams

2013 ◽  
Author(s):  
M. Oliviero ◽  
S. Cunsolo ◽  
W. M. Harris ◽  
M. Iasiello ◽  
W. K. S. Chiu ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Pressure Drop ◽  
Metal Foam ◽  
High Surface ◽  
Thermal Characteristics ◽  
Industrial Applications ◽  
Metal Foams ◽  
Surface Evolver ◽  
Periodic Cell ◽  
Numerical Predictions

Their light weight, open porosity, high surface area per unit volume and thermal characteristics make metal foams a promising material for many industrial applications involving fluid flow and heat transfer. Pressure drop and heat transfer of porous media have inspired a number of experimental and numerical studies. Many models have been proposed in the literature that correlate the pressure gradient and the heat transfer coefficient with the mean cell size and porosity. However, large differences exist among results predicted by different models. Most studies are based on idealized periodic cell structures. In this study, the true 3-D micro-structure of the metal foam is obtained by employing x-ray computed microtomography (XCT). For comparison, ideal Kelvin foam structures are developed in the free-to-use software “Surface Evolver” surface energy minimization program. Pressure drop and heat transfer are then investigated using the CFD Module of COMSOL® Multiphysics code. A comparison between the numerical predictions from the real and ideal geometries is carried out.

scholarly journals Microtomography-based numerical simulations of heat transfer and fluid flow through β -SiC open-cell foams for catalysis

2016 ◽  
Vol 278 ◽  
pp. 350-360 ◽  
Author(s):  
Xiaolei Fan ◽  
Xiaoxia Ou ◽  
Fei Xing ◽  
Glen A. Turley ◽  
Petr Denissenko ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Fluid Flow ◽  
Numerical Simulations ◽  
Open Cell ◽  
Flow Through ◽  
Open Cell Foams

scholarly journals The effect of open-cell metal foams strut shape on convection heat transfer and pressure drop

2016 ◽  
Vol 103 ◽  
pp. 333-343 ◽  
Author(s):  
Giuseppe Ambrosio ◽  
Nicola Bianco ◽  
Wilson K.S. Chiu ◽  
Marcello Iasiello ◽  
Vincenzo Naso ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Pressure Drop ◽  
Convection Heat Transfer ◽  
Metal Foams ◽  
Convection Heat ◽  
Open Cell
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