نتایج جستجو برای: indirect boundary element method

تعداد نتایج: 1953766  

Journal: :journal of mechanical research and application 2009
hassan ghassemi roya shademani

this paper describes a contra-rotating propeller (crp) system to calculate the hydrodynamic characteristics and then design the optimum operational condition to be installed on two different large bulk carriers and vlcc. the method is based on boundary element method (bem) to obtain the hydrodynamic performance of any complicated configuration such as crp system, and then the optimum propeller ...

2012
M. Feischl T. Führer M. Karkulik D. Praetorius MICHAEL FEISCHL THOMAS FÜHRER MICHAEL KARKULIK JENS M. MELENK DIRK PRAETORIUS

Journal: :علوم و تکنولوژی محیط زیست 0

the paper presents the results of an investigation on the acoustic performance of vertical profile parallel barriers with quadratic residue diffuser tops and faces. a 2d boundary element method (bem) was used to predict the barrier insertion loss. the results of rigid and with absorptive coverage were also calculated for comparisons. using qrd on the top surface and faces of all vertical profil...

Journal: :Numerische Mathematik 2008
Sarah Engleder Olaf Steinbach

In this paper we describe and analyze some modified boundary element methods to solve exterior boundary value problems for the Helmholtz equation with either Dirichlet or Neumann boundary conditions. The proposed approach avoids spurious modes even in the case of Lipschitz boundaries. Moreover, the regularisation is done based on boundary integral operators which are already available in standa...

2006
D. Soares W. J. Mansur O. von Estorff

An iterative coupling of finite element and boundary element methods for the investigation of coupled fluid-solid systems is presented. While finite elements are used to model the solid, the adjacent fluid is represented by boundary elements. In order to perform the coupling of the two numerical methods, a successive renewal of the variables on the interface between the two subdomains is perfor...

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