This paper proposes a novel approach for smoothing surfaces represented by triangular meshes. The proposed method is a two-step procedure: surface normal smoothing through fuzzy vector median (FVM) filtering followed by vertex position update based on the least square error criteria. This paper applies the fuzzy ordering theory to the vector based data and introduces the fuzzy vector median. Th...

Sedimentation is one of the most important problems in harbors that results in considerable economic costs. Harbor planforms affects the flow pattern in the harbor basin and consequently, plays an important role in sediment transport and sedimentation. In the present study, a two dimensional depth-averaged hydrodynamic and sediment transport model has been developed to investigate the effect of...

Thermal characteristics of turbulent nanofluid flow in a rectangular pipe have been investigated numerically. The continuity, momentum, and energy equations were solved by means of a finite volume method (FVM). The symmetrical rectangular channel is heated at the top and bottom at a constant heat flux while the sides walls are insulated. Four different types of nanoparticles Al2O3, ZnO, CuO, an...

The weighted essentially non-oscillatory (WENO) schemes are a popular class of high order numerical methods for hyperbolic partial differential equations (PDEs). While WENO schemes on structured meshes are quite mature, the development of finite volume WENO schemes on unstructured meshes is more difficult. A major difficulty is how to design a robust WENO reconstruction procedure to deal with d...

Purpose – The aim of the present study is to evaluate the accuracy and efficiency of Lattice-BGK (LBGK) method application in simulation of the 3D flow through complex geometry. On the other hand, the steady flows through vascular tube with Reynolds number 10-150 and different constriction spacing ratios are simulated. Design/methodology/approach – The numerical method is based on the LGBK meth...

In the present study, effect of receiver position error on optical and thermal performance a parabolic trough collector (PTC) has been studied. Optical analysis PTC carried out by using Monte Carlo ray tracing (MCRT) method. The solar heat flux profile obtained from is coupled with finite volume method (FVM) to study PTC. Simulations have done for experimental SEGS LS2 used in Sandia National L...

This paper applies Reynolds-averaged Navier-Stokes (RANS) method to study propulsion performance in head and oblique waves. Finite volume (FVM) is employed discretize the governing equations SST k-ω model used for modeling turbulent flow. The free surface solved by of fluid (VOF) method. Sliding mesh technique enable rotation propeller. Propeller open water curves are determined propeller simul...

In order to effectually improve the performance of parabolic trough solar collector system and homogenize temperature distribution on absorber tube, an innovative convergent-divergent tube was designed as PTR. The finite volume method (FVM) Monte Carlo ray tracing (MCRT) are combined simulate heat transfer process in collector. average relative error between numerical results experimental condu...