کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10426931 908599 2005 15 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Velocity selection in 3D dendrites: Phase field computations and microgravity experiments
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی (عمومی)
پیش نمایش صفحه اول مقاله
Velocity selection in 3D dendrites: Phase field computations and microgravity experiments
چکیده انگلیسی
The growth of a single needle of succinonitrile (SCN) is studied in three-dimensional (3D) space by using a phase field model. For realistic physical parameters, namely, the large differences in the length scales, i.e., the capillarity length (10-8-10-6cm), the radius of the curvature at the tip of the interface (10-3-10-2cm) and the diffusion length (10-3-10-1cm), resolution of the large differences in length scale necessitates a 5003 grid on the supercomputer. The parameters, initial and boundary conditions used are identical to those of the microgravity experiments of Glicksman et al. for SCN. The numerical results for the tip velocity are (i) largely consistent with the Space Shuttle experiments, (ii) compatible with the experimental conclusion that tip velocity does not increase with increased anisotropy, (iii) different for 2D versus 3D by a factor of approximately 1.9, (iv) essentially identical for fully versus rotationally symmetric 3D.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nonlinear Analysis: Theory, Methods & Applications - Volume 62, Issue 3, 1 August 2005, Pages 467-481
نویسندگان
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