Investigation of the heat transport during the hollow spheres production from the tin melt
Michael Petrov1,2
, Pavel Petrov2, Juergen Bast1, Anatoly Sheypak3
1Technical University Mining Academy of Freiberg, Institute of Machine Elements, Design and Manufacturing, Leipzigerstr. 30, 09596 Freiberg, Germany.
2Moscow State University of Mechanical Engineering (MAMI), Department Car Body Making and Metal Forming, B. Semenovskaya street 38, 107023 Moscow, Russia.
3Moscow State Industrial University (MSIU), Department Electrical, Heating and Hydraulic Engineering and Energy machines, Avtozavodskaya street 16, 115280 Moscow, Russia.
DOI:
https://doi.org/10.7494/cmms.2013.2.0442
Abstract:
The present paper reveals one of the energy efficient ways of the units (hollow spheres) production for cellular structures for their further application in light weight constructions, realized through the metallurgical procedure. The metallurgical method exhibit all known methods in intelligence, because it based on the own physical properties of the used materials and boundary conditions of the process, not involving any organically core and preparation of the powder and slurries. These small hollow spheres made from different materials could change the weight of a construction part essentially, used as acoustic and thermal insulation and also as protection against vibrations. They can be used as a unit cell for big parts and alone filled with an inert gas, e.g. fusion targets. Pure tin shells were produced intransient (thixotropic) state of materials by elevated temperatures (close to the melting point of the pure tin) and several simulation steps were used, to determine the preferable boundary conditions. To one of them belongs the investigation of the temperature fields during the formation process. The heat transport from the tin melt into the semi-solid tin shell influence the nucleation process so the solid wall should be formed before the gas starts to form the inner hollow space. Otherwise the semi-solid shell will be broken by the gas pressure or the inner hollow space does not occur. For these purposes the CFD- (Computational Fluid Dynamic) and FEM-commercial codes such as FLUENT and Solid Works Simulation Package respectively were taken. At the end the data verification of the obtained simulation results with the measurements on the laboratory stand and theoretical calculations were carried out. Current investigation was completed by the determination of the whole temperature fields on the side surface of the form nozzle, which was obtained from a thermogram captured with the help of an infrared camera (IRC).
Cite as:
Petrov, M., Petrov, P., Bast, J., & Sheypak, A. (2013). Investigation of the heat transport during the hollow spheres production from the tin melt. Computer Methods in Materials Science, 13(2), 276 – 282. https://doi.org/10.7494/cmms.2013.2.0442
Article (PDF):
Keywords:
Hollow spheres, Spherical shells, Tin melt, FEM, CFD, Solid Works, Fluent, Thermography, Heat transport
References: