首页> 外文期刊>Numerical Heat Transfer, Part B. Fundamentals: An International Journal of Computation and Methodology >A STREAMFUNCTION-VORTICITY-BASED FINITE-ELEMENT FORMULATION FOR LAMINAR-CONVECTION PROBLEMS
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A STREAMFUNCTION-VORTICITY-BASED FINITE-ELEMENT FORMULATION FOR LAMINAR-CONVECTION PROBLEMS

机译:基于对流涡度的层流对流有限元公式

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The finite-element method is used to solve mixed-, forced-, and natural-convection problems in two-dimensional incompressible laminar flows. The streamfunction-vorticity equations are uncoupled and solved in sequence with the energy equation. The wall vorticity is evaluated in the framework of the streamfunction equation, and particular care is taken to specify inflow and outflow boundary conditions properly. The resulting scheme achieves convergence without the traditional need for upwinding, even for very high values of the Reynolds and the Rayleigh numbers. Stability and accuracy of the approach are demonstrated by the solution of three well-known test problems concerning mixed and forced convection downstream of a backward-facing step, and natural convection in a heated square cavity. [References: 23]
机译:有限元方法用于解决二维不可压缩层流中的混合,强迫和自然对流问题。流函数-涡度方程解耦并与能量方程按顺序求解。在流函数方程的框架内评估壁的涡度,并特别注意正确指定流入和流出边界条件。所得的方案即使没有很高的雷诺数和瑞利数,也无需传统上风就可以实现收敛。通过解决三个众所周知的测试问题,证明了该方法的稳定性和准确性,这些问题涉及向后步骤下游的混合对流和强制对流,以及在加热的方腔中的自然对流。 [参考:23]

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