Specification of wall boundary conditions and transverse velocity profile conditions in finite element modeling
Present work mainly focuses on the influence of wall boundary conditions and imposition of transverse velocity boundary conditions on the flow field of a bluff body.Uniform velocity over the nodestring is specified in slip condition mode. Three types of transverse velocity profile are adopted for the no slip situation; top hat is same as slip case except for no velocities at wall; parabola for the simple and typical approximation of transverse velocity shape in open channel flow; beta distribution for the general expansion. Assignment of top hat and parabola velocity profiles yields maximum velocity nearby the cylinder while uniform one has maximum de walls. Maximum velocity of parabola input is about 44 ％ higher than that of uniform assignment.
wwall boundary condition transverse velocity boundary condition slip condition no slip condition beta distribution
Il Won Seo Chang Geun Song
Department of Civil and Environmental Engineering,Seoul National University,Seoul,Korea
国际会议
9th International Conference on Hydrodynamics(第九届国际水动力学会议 ICHD2010)
上海
英文
630-635
2010-10-11（万方平台首次上网日期，不代表论文的发表时间）