Experimental Investigations of the Depth Filtration inside Open-Cell Foam Filters Supported by High-Resolution Computed Tomography Scanning and Pore-Scale Numerical Simulations

Hoppach Daniel; Werzner Eric; Demuth CorneliusLoewer ErikLehmann HenryDitscherlein LisaDitscherlein RalfPeuker Urs A.Ray Subhashis

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Experimental Investigations of the Depth Filtration inside Open-Cell Foam Filters Supported by High-Resolution Computed Tomography Scanning and Pore-Scale Numerical Simulations

机译：Experimental Investigations of the Depth Filtration inside Open-Cell Foam Filters Supported by High-Resolution Computed Tomography Scanning and Pore-Scale Numerical Simulations

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abstract_textpThe removal of nonmetallic inclusions from metal melts is a crucial step in producing high-quality castings that have to meet strict requirements regarding strength, toughness, and machinability. To separate the unwanted impurities, the liquid metal is usually passed through ceramic foam filters (CFF), in which the inclusions adhere to the surface of a complex strut network. The development of improved CFF structures requires a good understanding of the physical phenomena involved in the filtration process. In this respect, an experimental investigation of the real system is challenging, due to the opacity of the melt, high temperature, and the presence of a protective atmosphere. Therefore, the present study relies on water model experiments, which are conducted for different pore counts and flow velocities. To achieve a high degree of similarity to the real system, the wetting properties of the filters and particles are adjusted accordingly. Experimentally evaluated filtration efficiencies are compared with predictions obtained from a detailed numerical model that considers the CFF geometry, which is digitized using 3D X-Ray micro-computed tomography, and previously measured particle adhesion forces. The results suggest that a considerable fraction of particles does not remain attached after collision with the CFF struts./p/abstract_text

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《advanced engineering materials》 |2020年第2期|共13页
作者
Hoppach Daniel; Werzner Eric; Demuth CorneliusLoewer ErikLehmann HenryDitscherlein LisaDitscherlein RalfPeuker Urs A.Ray Subhashis;
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作者单位

Tech Univ Bergakad Freiberg, Inst Mech Proc Engn & Mineral Proc, Agr Str 1, D-09599 Freiberg, Germany;

Tech Univ Bergakad Freiberg, Inst Thermal Engn, Chair Gas & Heat Technol, Gustav Zeuner Str 7, D-09596 Freiberg, Germany;

Tech Univ Bergakad Freiberg, Virtual Real & Multimedia Grp, Bernhard von Cotta Str 2, D-09599 Freiberg, Germany;

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正文语种英语
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atomic force microscopy; ceramic foam filters; computed tomography; depth filtration; pore-scale simulations; MELT FILTRATION; ALUMINA; AGGLOMERATION; FORCE; LIFT;

Experimental Investigations of the Depth Filtration inside Open-Cell Foam Filters Supported by High-Resolution Computed Tomography Scanning and Pore-Scale Numerical Simulations

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