Electromagnetically Modified Filtration of Aluminum Melts—Part I: Electromagnetic Theory and 30 PPI Ceramic Foam Filter Experimental Results

Kennedy, Mark William; Akhtar, Saleem; Bakken, Jon Arne; Aune, Ragnhild E.

doi:10.1007/s11663-013-9798-8

Cited by 16 publications

(16 citation statements)

References 21 publications

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“…As a result, the Forchheimer drag term (bF) defined by Eq. [11] was applied instead of the Brinkman-Forchheimer drag coefficient (b) in Eq. [4].…”

Section: ½10mentioning

confidence: 99%

“…In metallurgy, CFFs are used to remove undesired nonmetallic particles from molten metal before casting, [1,4,[7][8][9][10][11][12][13] i.e., filtration. In order to prime the filters, the melt has to reach a certain pressure on the top of the filter to initiate passage through the filter.…”

Section: Introductionmentioning

confidence: 99%

“…In order to prime the filters, the melt has to reach a certain pressure on the top of the filter to initiate passage through the filter. [9][10][11][12]14] To estimate, adjust, and maintain the required pressure and to regulate the melt velocity, it is essential to determine the Darcy and non-Darcy permeability coefficients of the filter. [8,9,15] The permeability coefficients can be obtained using permeametry experiments.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Fluid Bypassing on the Experimentally Obtained Darcy and Non-Darcy Permeability Parameters of Ceramic Foam Filters

Akbarnejad

Pour

Jonsson

et al. 2016

Metall Mater Trans B

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SHAHIN AKBARNEJAD, MOHSEN SAFFARI POUR, LAGE TORD INGEMAR JONSSON, and PÄ R GÖ RAN JÖ NSSONCeramic foam filters (CFFs) are used to remove solid particles and inclusions from molten metal. In general, molten metal which is poured on the top of a CFF needs to reach a certain height to build the required pressure (metal head) to prime the filter. To estimate the required metal head, it is necessary to obtain permeability coefficients using permeametry experiments. It has been mentioned in the literature that to avoid fluid bypassing, during permeametry, samples need to be sealed. However, the effect of fluid bypassing on the experimentally obtained pressure gradients seems not to be explored. Therefore, in this research, the focus was on studying the effect of fluid bypassing on the experimentally obtained pressure gradients as well as the empirically obtained Darcy and non-Darcy permeability coefficients. Specifically, the aim of the research was to investigate the effect of fluid bypassing on the liquid permeability of 30, 50, and 80 pores per inch (PPI) commercial alumina CFFs. In addition, the experimental data were compared to the numerically modeled findings. Both studies showed that no sealing results in extremely poor estimates of the pressure gradients and Darcy and non-Darcy permeability coefficients for all studied filters. The average deviations between the pressure gradients of the sealed and unsealed 30, 50, and 80 PPI samples were calculated to be 57.2, 56.8, and 61.3 pct. The deviations between the Darcy coefficients of the sealed and unsealed 30, 50, and 80 PPI samples found to be 9, 20, and 31 pct. The deviations between the non-Darcy coefficients of the sealed and unsealed 30, 50, and 80 PPI samples were calculated to be 59, 58, and 63 pct.

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“…As a result, the Forchheimer drag term (bF) defined by Eq. [11] was applied instead of the Brinkman-Forchheimer drag coefficient (b) in Eq. [4].…”

Section: ½10mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effect of Fluid Bypassing on the Experimentally Obtained Darcy and Non-Darcy Permeability Parameters of Ceramic Foam Filters

Akbarnejad

Pour

Jonsson

et al. 2016

Metall Mater Trans B

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show abstract

“…[2] I personally do not rate particulate inclusions in Al alloys as of any importance. Over recent years, it has become abundantly apparent that the inclusions of overwhelming importance in nearly all cast metals are films, usually oxides, and usually bifilms, entrained into the melt during stirring and pouring.…”

mentioning

confidence: 98%

“…The two papers by Kennedy et al [1,2] in the June issue of MMTB are nice examples of careful, accurate work.…”

mentioning

confidence: 99%

Discussion of “Characterization of Ceramic Foam Filters Used for Liquid Metal Filtration” and “Electromagnetically Modified Filtration of Aluminum Melts—Part I. Electromagnetic Theory and 30 PPI Ceramic Foam Filter Experimental Results”

Campbell

2013

Metall Mater Trans B

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An Investigation on Permeability of Ceramic Foam Filters (CFF)

Akbarnejad¹,

Kennedy²,

Fritzsch³

et al. 2015

Light Metals 2015

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Electromagnetically Modified Filtration of Aluminum Melts—Part I: Electromagnetic Theory and 30 PPI Ceramic Foam Filter Experimental Results

Cited by 16 publications

References 21 publications

Effect of Fluid Bypassing on the Experimentally Obtained Darcy and Non-Darcy Permeability Parameters of Ceramic Foam Filters

Effect of Fluid Bypassing on the Experimentally Obtained Darcy and Non-Darcy Permeability Parameters of Ceramic Foam Filters

Discussion of “Characterization of Ceramic Foam Filters Used for Liquid Metal Filtration” and “Electromagnetically Modified Filtration of Aluminum Melts—Part I. Electromagnetic Theory and 30 PPI Ceramic Foam Filter Experimental Results”

An Investigation on Permeability of Ceramic Foam Filters (CFF)

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