نتایج جستجو برای: flassification boundary

تعداد نتایج: 159238  

and M.J. Kazemzadeh-Parsi, F. Daneshmand, M. Farid,

In this paper, a modification on the fixed grid finite element method is presented and used in the solution of 2D linear elastic problems. This method uses non-boundary-fitted meshes for the numerical solution of partial differential equations. Special techniques are required to apply boundary conditions on the intersection of domain boundaries and non-boundary-fitted elements. Hence, a new met...

Krein [1] mentioned that for each PD equation we have two extreme operators, one is the minimal in which solution and its derivatives on the boundary are zero, the other one is the maximal operator in which there is no prescribed boundary conditions. They claim it is not possible to have a related boundary value problem for an arbitrarily chosen operator in between. They have only considered lo...

Journal: :مکانیک سیالات و آیرودینامیک 0
عبدالامیر بک خوشنویس محمدجواد ایزدی یزدی

the flow characteristics around an elliptic cylinder with an axis ratio of ar=2 located near a flat plate were investigated experimentally. the elliptic cylinder was located on the inside and outside a turbulent boundary layer region whose thickness (δ) is 0.38b. the reynolds numbers based on the height of the cylinder cross-section were 15000 and 30000. measurements of mean velocity and turbul...

and M.J. Kazemzadeh-Parsi, F. Daneshmand, M. Farid,

In this paper, a modification on the fixed grid finite element method is presented and used in the solution of 2D linear elastic problems. This method uses non-boundary-fitted meshes for the numerical solution of partial differential equations. Special techniques are required to apply boundary conditions on the intersection of domain boundaries and non-boundary-fitted elements. Hence, a new met...

Journal: :journal of sciences, islamic republic of iran 2007
k. ivaz

in this paper we consider a nonlinear two-phase stefan problem in one-dimensional space. the problem is mapped into a nonlinear volterra integral equation for the free boundary.

ژورنال: :مطالعات و پژوهش های شهری - منطقه ای 0
مصطفی محمدی اهواز، دانشگاه شهید چمران اهواز

محدوده های شهری و روش منطقی تعیین و تدقیق آنها را می توان جنبه فراموش شده در نظام شهرسازی ایران دانست. هر چند در مراحل تدوین و تکوین قوانین شهری در ایران، عناوین متناظر موضوع بحث محدوده های شهری(حریم، محدوده خدماتی، حریم استحفاظی، حوزه، حد مصوب و 16 واژه دیگر) به صورت متواتر به کار رفته اند، ولی این تواتر و تکرار بر ناکارآمدی قوانین ملاک عمل افزوده تا هیچ گاه مکانیزم مطلوبی برای تعیین سطح منطقی...

Journal: :CoRR 2002
W. Chen

This paper is concerned with the two new boundary-type radial basis function collocation schemes, boundary knot method (BKM) and boundary particle method (BPM). The BKM is developed based on the dual reciprocity theorem, while the BKM employs the multiple reciprocity technique. Unlike the method of fundamental solution, the two methods use the non-singular general solution instead of singular f...

Journal: :نشریه دانشکده فنی 0
غلامرضا شهریار حشمتی بهمن مهری

in this paper a method is presented in details to solve a nonlinear partial differential equation which has many applications in engineering fields. the boundary condition is mixed to be able to define the value of function on its variation on the boundary. examples are given to demonstrate the accuracy and efficiency of the method.

Journal: :journal of applied research in water and wastewater 2014
matthieu dufresne josé vazquez

long-throated flumes are measurement structures often used in water and wastewater systems to determine the flow discharge. the head-discharge relationship of long-throated flumes is traditionally determined following the critical flow theory and the boundary layer concept. after a review of the traditional approach and an analysis of the approximate assumptions of the boundary layer approach, ...

Journal: :journal of sciences islamic republic of iran 0

in this paper, we investigate a singular perturbation problem including a fourth order o.d.e. with general linear boundary conditions. firstly, we obtain the necessary conditions of solution of o.d.e. by making use of fundamental solution, then by compatibility of these conditions with boundary conditions, we determine that, for given perturbation problem, whether boundary layer is formed or not.

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید