<P>The magnetic micro powder orientation under viscous shear flow has been analytically understood and characterized into a new analytical orientation model for a powder injection molding process. The effects of hydrodynamic force from the visco...
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https://www.riss.kr/link?id=A107476003
2018
-
SCOPUS,SCIE
학술저널
115002
0
상세조회0
다운로드다국어 초록 (Multilingual Abstract)
<P>The magnetic micro powder orientation under viscous shear flow has been analytically understood and characterized into a new analytical orientation model for a powder injection molding process. The effects of hydrodynamic force from the visco...
<P>The magnetic micro powder orientation under viscous shear flow has been analytically understood and characterized into a new analytical orientation model for a powder injection molding process. The effects of hydrodynamic force from the viscous flow, external magnetic force and internal dipole–dipole interaction were considered to predict the orientation under given process conditions. Comparative studies with a finite element method proved the calculation validity with a partial differential form of the model. The angular motion, agglomeration and magnetic chain formation have been simulated, which shows that the effect of dipole–dipole interaction among powders on the orientation state becomes negligible at a high Mason number condition and at a low <I>λ</I> condition (the ratio of external magnetic field strength and internal magnetic moment of powder). Our developed model can be very usefully employed in the process analysis and design of magnetic powder injection molding.</P>
Highly efficient computer algorithm for identifying layer thickness of atomically thin 2D materials