Experimental and numerical determination of effective thermal conductivity of open cell FeCrAl-alloy metal foams

Wulf, Rhena; Mendes, Miguel A.A.; Skibina, Valeria; Al-Zoubi, Ahmad; Trimis, D.; Ray, Subhashis; Groß, Ulrich

doi:10.1016/j.ijthermalsci.2014.06.030

Cited by 43 publications

(17 citation statements)

References 24 publications

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“…For instance, the model of Coquard et al [69], specifically conceived for metal foams, gives for both air and water the best results with parallelepipedic lumps but with different values of the ratio D/d (D/d = 3 for air and D/d = 1 for water). A few words need to be spent about the the models of Mendes and coworkes [34,38,40,42], Eq. (25) and Eq.…”

Section: Discussionmentioning

confidence: 99%

“…Unfortunately, their relations demonstrated to be not applicable in the case of metal foams and, for this reason, are not reported in Table 2. Mendes and coworkers [34,38,42] proposed four simplified models obtained by a linear combination of two generic minimum and maximum bounds per time (Serial, Parallel, Effective medium theory, lower and upper Hashin-Shtrikman bounds), as reported in Eq. (25).…”

Section: Empirical Correlationsmentioning

confidence: 99%

“…The literature offers several experimental works for the measurement of the effective thermal conductivity of foams [1,31,42,46,53,54,69,76,92,94,96,[98][99][100][101][102][103][104][105][106], but only few relative to open-cell aluminum metal foams in high porosity range, which are summarized in Table 3. Usually, in the experimental tests, the foam specimen is sandwiched between two metallic plates of which the upper one is heated while the lower one is cooled by a thermostatic bath [7,46,53,76].…”

Section: Experimental Data For the Effective Thermal Conductivitymentioning

confidence: 99%

“…At the moment, a significant effort is devoted to describing the foam structure in a more realistic way: from this perspective, X-ray computed microtomography (μ-CT) appears a promising and appealing approach to be coupled to numerical simulations. The literature includes several works dealing with μ-CT, not only limited to metal foams or thermal conductivity estimations [1,3,[13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][29][30][31][32][33][34][35][36][37][38][39][40][41][42][43][44][45]. The literature offers a wide set of analytical and empirical correlations for the estimation of the effective thermal conductivity of metal foams.…”

Section: Introductionmentioning

confidence: 99%

“…Circles are the experimental data, calculated through Eq (42),. while the line corresponds to a linear fitting.…”

mentioning

confidence: 99%

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On the effective thermal conductivity of aluminum metal foams: Review and improvement of the available empirical and analytical models

Ranut

2016

Applied Thermal Engineering

139

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Section: Discussionmentioning

confidence: 99%

Section: Empirical Correlationsmentioning

confidence: 99%

Section: Experimental Data For the Effective Thermal Conductivitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Circles are the experimental data, calculated through Eq (42),. while the line corresponds to a linear fitting.…”

mentioning

confidence: 99%

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On the effective thermal conductivity of aluminum metal foams: Review and improvement of the available empirical and analytical models

Ranut

2016

Applied Thermal Engineering

139

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

Monno

Negri²,

Mussi³

et al. 2018

Adv Eng Mater

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Metal foams may have applications in the field of catalytic supports, but the available manufacturing processes are too expensive for industrial use. The goal of the paper is to investigate and compare alternative cost-efficient manufacturing methods, aimed at producing open-cell aluminum foams for low-temperature catalytic applications. The explored process chains are 1) solid state bonding of stacked thin slices of closed cell foams; 2) the conventional method of sintering and dissolution of aluminum powders with space holder; 3) sintering and dissolution of recycled aluminum turning chips with space holder. The process chains and their main parameters are described in detail. The morphological properties of the produced open-cell foam samples, relevant to catalytic applications (cell size, hydraulic porosity, total porosity, surface to volume ratio), are measured and compared. Finally, their heat transfer properties are experimentally compared. The foams produced by the sintering and dissolution process exhibit the most favorable compromise among the goals of reducing the manufacturing cost, increasing the heat transfer coefficients, controlling the cell morphology.

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Simulation of Fluid Flow, Heat Transfer and Particle Transport Inside Open-Cell Foam Filters for Metal Melt Filtration

Werzner,

Mendes,

Demuth

et al. 2024

Springer Series in Materials Science

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In order to develop improved filters for metal melt filtration, different physical phenomena that take place during depth filtration of liquid metals need to be well understood. Due to the difficult accessibility of the process, the harsh process conditions and the randomness of the typically employed ceramic foam filters, representative experimental investigations are extremely difficult to perform and often provide only integral quantities or selective information. This chapter presents a numerical model for simulating the depth filtration of liquid metal at the pore-scale, i.e., fully resolving the complex filter geometry, which can also accurately handle the curved filter walls. In the model, the velocity and pressure distribution of the melt flow is obtained by the lattice-Boltzmann method and the temperature field is calculated using the finite volume method, while the transport and filtration of the inclusions are predicted by solving the equation of motion for particles in a Lagrangian reference frame. In order to obtain a consistent representation of the curved filter walls for both particle transport and fluid flow, the Euclidean distance field of the filter structures is employed. By comprehensive parametric studies, the sensitivity of the filtration process with respect to various geometric parameters and process conditions is investigated. Therefore, geometries of conventionally manufactured filters, acquired from 3D μCT scanning, as well as computer-generated filter structures are considered. Their performance is assessed by evaluating various effective properties, such as the viscous and inertial permeability and the filtration coefficient. The numerical predictions allow to draw conclusions with respect to the dominant physical mechanisms and are compared with those from simplified physical models, which are shown to be sufficiently accurate for the pre-screening of filters. On the basis of the detailed results, suggestions for improved filter geometries are made, depending on the considered filtration process. Further, simplified models for the prediction of the effective thermal conductivity of open-cell foams in presence and absence of radiation are presented and validated using the detailed numerical predictions.

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Experimental and numerical determination of effective thermal conductivity of open cell FeCrAl-alloy metal foams

Cited by 43 publications

References 24 publications

On the effective thermal conductivity of aluminum metal foams: Review and improvement of the available empirical and analytical models

On the effective thermal conductivity of aluminum metal foams: Review and improvement of the available empirical and analytical models

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

Simulation of Fluid Flow, Heat Transfer and Particle Transport Inside Open-Cell Foam Filters for Metal Melt Filtration

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