توجه: محتویات این صفحه به صورت خودکار پردازش شده و مقاله‌های نویسندگانی با تشابه اسمی، همگی در بخش یکسان نمایش داده می‌شوند.
۱Evaluation of the General Purpose Boundary Condition for theThermal Lattice Boltzmann Method
نویسنده(ها): ، ،
اطلاعات انتشار: دوازدهمین کنفرانس دینامیک شاره ها، سال
تعداد صفحات: ۹
The lattice Boltzmann method is considered as an alternative approach to the well–known finite difference, finite element, and finite volume techniques for solving the flow fields. In this work, a general purpose boundary condition for a thermal lattice Boltzmann method based on the BGK model has been evaluated to simulate the natural convection flow in a square cavity. The model uses the double populations approach to simulate hydrodynamic and thermal fields. The problem is solved for different Rayleigh numbers and the results are in good agreement with those from other common methods. The results show the capabilities of the presented thermal LBM for predicting fluid flow with heat transfer.<\div>

۲Proper Numerical simulation of water surface profile over stepped spillway Using Different Solvers
نویسنده(ها): ، ،
اطلاعات انتشار: هشتمین کنگره ملی مهندسی عمران، سال
تعداد صفحات: ۸
Enhancing the energy dissipation along a spillway is of great importance for more efficient design of the downstream structures. In this regard, a number of steps can be added to the spillway in order to increase the flow turbulence. By this action the dimensions of stilling basin and consequently the cost is significantly reduced. Inthis research the flow over stepped spillway and the downstream of hydraulic jump is modeled using FLUENTand FLOW–3D softwares. The water surface profile over the spillway and the hydraulic jump is then compared with that of the experimental model and good agreement is observed. The capability of FLOW–3D in allowing the air to escape through free surface is investigated by simulating a dam break problem and comparing it with theexisting experimental result. The results show that this software allows the air escape through a free surface if the Drift–flux model and gas escape model is invoked<\div>
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