کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
974479 | 1480125 | 2016 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Upscaling diffusion waves in porous media
ترجمه فارسی عنوان
امواج انتشار امواج در رسانه های متخلخل
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کلمات کلیدی
امواج توزیع، رسانه های متخلخل، دوره متوسطه، نفوذ پذیری موثر،
موضوعات مرتبط
مهندسی و علوم پایه
ریاضیات
فیزیک ریاضی
چکیده انگلیسی
The aim of this work is to derive the effective-medium equations and to estimate the related effective diffusivities for diffusion waves in porous media. Effective diffusivities are estimated within the framework of the volume averaging method, where they are obtained from the solution of the associated closure problems in 2D and 3D periodic unit cells. The results showed that the transport of diffusion waves are governed by the diffusion and co-diffusion mechanisms of harmonic waves. In addition, numerical results showed that the effective diffusivities increase with frequency, while the effective co-diffusivities display a resonance-like behavior. Our results also indicate that geometry plays a more significant effect over the predictions of the co-diffusion coefficient at moderate frequencies and it mainly influences the predictions of the direct diffusivity at low frequencies (i.e.,Ïââª1).
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica A: Statistical Mechanics and its Applications - Volume 448, 15 April 2016, Pages 57-67
Journal: Physica A: Statistical Mechanics and its Applications - Volume 448, 15 April 2016, Pages 57-67
نویسندگان
Francisco J. Valdés-Parada, José Álvarez RamÃrez, J. Alberto Ochoa-Tapia,