4367

4116

كارشناسي ارشد

تبديل انرژي

اصفهان:دانشگاه صنعتي اصفهان ،دانشكده مكانيك

1387

نه، 92، [II] ص:جدول، نمودار

ص. ع به: فارسي وانگليسي

محمود اشرفي زاده

احمد رضا پونچي

20/12/87

ابراهيم شيراني، احمد رضا پيشه ور

مهندسي مكانيك

ID4116

به فارسي و انگليسي: قابل رويت در نسخه ديجيتال

AbstractThe lattice Boltzmann method LBM is a particle based numerical scheme for calculating fluidflow problems Key advantages of the LBM are due to the fact that the solution for the particledistribution functions is explicit easy to implement and natural to parallelize These advantagesmake LBM as a powerful tool for simulating a wide variety of fluid dynamical applications Dueto its particulate nature and local dynamics investigating the flow behavior near the boundariesto construct suitable and accurate boundary conditions is of great importance in LBM Incontrast as the LBM often uses uniform regular Cartesian grids in space the method suffersfrom accuracy reduction in dealing with curved boundaries that cross the lattice edges Suchproblems cause the boundary treatment to be of great importance in LBM There are a lot ofboundary treatments proposed by different researchers especially for the velocity at a solid wallto increase the accuracy and efficiency of this method In this project different boundary conditions are investigated extensively The accuracy of theseboundary conditions are tested and compared against solving simple flow problems This projectmainly has focused on assessing no slip boundary conditions for solid walls An Investigation ofcurved boundary treatments is also presented here At the end of this project a method ispresented to evaluate the order of accuracy of boundary conditions in LBM and the accuracy ofsome no slip boundary conditions is calculated The presentation of a new scheme to accuratelytreat the boundary conditions for curved geometries is an innovation in this work

محمود اشرفي زاده

احمد رضا پونچي

ابراهيم شيراني، احمد رضا پيشه ور