کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
797248 902956 2007 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Fluid impact on a solid boundary
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
پیش نمایش صفحه اول مقاله
Fluid impact on a solid boundary
چکیده انگلیسی

The hydrodynamic impact due to a column of liquid hitting on a solid wall is analysed. The problem is solved using the complex velocity potential together with the boundary element method, based on the assumption that the fluid is inviscid and incompressible and the flow is irrotational. A stretched coordinate system is used, which is defined through the ratio of the normal Cartesian system to an appropriately chosen length scale varying with time. Numerical simulations are made for incoming liquid columns of various shapes. The results from the triangular column are compared with those obtained from a similarity solution and excellent agreement is found. It is shown that for a symmetrical liquid column with a shape defined by f(x)=a1−αxα, with 0<α<1 and a>0, the flow field and pressure distribution in the fluid after impact depend only on the parameter Ut/a: they do not depend separately on the speed U of the liquid column, the time t or the coefficient a.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Fluids and Structures - Volume 23, Issue 5, July 2007, Pages 755–765
نویسندگان
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