کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
667747 1458543 2011 19 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Importance of unsteady contributions to force and heating for particles in compressible flows : Part 1: Modeling and analysis for shock–particle interaction
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
Importance of unsteady contributions to force and heating for particles in compressible flows : Part 1: Modeling and analysis for shock–particle interaction
چکیده انگلیسی

Shock–particle interaction is an important phenomenon. The interaction can be accurately resolved by direct numerical simulations. However, as the length scales of interest are much larger than the particle size in many applications, fully resolving the flow around the particle is impractical. Therefore, rigorous model for momentum and energy exchange in the interaction is very important. Shock–particle interaction is strongly time-dependent, so unsteady mechanisms play important roles in momentum and energy transfer. A model that includes unsteady contributions to force and heating is proposed. The model is used to investigate particle interactions with a planar shock wave and a spherical shock wave. The peak values and the net effects of unsteady contributions are used to measure their importance. The results show the peak values of unsteady contributions are much larger than the quasi-steady ones for a wide range of particle parameters. The net effects of unsteady contributions are important when the particle-to-gas density ratio is small. For the flow behind the spherical shock is unsteady and non-uniform, unsteady contributions have long-time influence on the particle evolution.


► A multiphase flow model with unsteady force and heating contributions is proposed.
► The model is used to study particle interactions with planar and spherical shocks.
► Peak values of unsteady contributions are much larger than quasi-steady contribution.
► Net effects of unsteady contributions are important for small density ratio.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Multiphase Flow - Volume 37, Issue 9, November 2011, Pages 1026–1044
نویسندگان
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