این سایت در حال حاضر پشتیبانی نمی شود و امکان دارد داده های نشریات بروز نباشند
Journal of Applied Fluid Mechanics، جلد ۱۳، شماره ۲، صفحات ۷۲۷-۷۳۶
عنوان فارسی
چکیده فارسی مقاله
کلیدواژه‌های فارسی مقاله
عنوان انگلیسی Air Bubbles Displacement in Yield Stress Fluids
چکیده انگلیسی مقاله The motion of air bubbles in a yield stress fluid is analyzed numerically using a 2D approach and the finite volume technique. The multiphase flow is simulated using the volume of fluid method (VoF), which solves the conservation equations of mass and momentum coupled to a transport equation for the volume fraction of the fluids. The effects of yield stress, bubble size, number and position of bubbles rising in a viscoplastic fluid confined between vertical parallel plates are analyzed and discussed. The results indicate that the yield stress has great impact on the rising velocity. In the case of multiple bubbles flowing vertically, it is observed that the displacement of one bubble influences the rising velocity of the others, causing them to approach each other. As the distance between the bubbles increases the interference is reduced and the bubbles begin to flow as single ones. When two bubbles are horizontally positioned, they can approach or move away from each other, depending on the initial distance between them. Furthermore, the bubbles shape is analyzed as a function of the governing parameters. It is observed that for lower Reynolds number the bubbles present a circular shape, but as inertia increases the bubble becomes ellipsoidal.
کلیدواژه‌های انگلیسی مقاله Viscoplastic fluids, Bubble displacement, Yield stress
نویسندگان مقاله M. F. Naccache |
Department of Mechanical Engineering, Pontifícia Universidade Católica-RJ Rua Marquês de Sõo Vicente 225, Rio de Janeiro, RJ 22453-900, Brazil

A. A. Abdu |
Department of Mechanical Engineering, Pontifícia Universidade Católica-RJ Rua Marquês de Sõo Vicente 225, Rio de Janeiro, RJ 22453-900, Brazil

C. Abreu |
Department of Mechanical Engineering, Pontifícia Universidade Católica-RJ Rua Marquês de Sõo Vicente 225, Rio de Janeiro, RJ 22453-900, Brazil

نشانی اینترنتی https://www.jafmonline.net/article_959_d7e64dd52054806d1f5e84c317ae66aa.pdf
فایل مقاله فایلی برای مقاله ذخیره نشده است
کد مقاله (doi)
زبان مقاله منتشر شده en
موضوعات مقاله منتشر شده
نوع مقاله منتشر شده
برگشت به: صفحه اول پایگاه   |   نسخه مرتبط   |   نشریه مرتبط   |   فهرست نشریات