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corner region
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  角域
    According to the numerical discrete character of indirect boundary element method, quadratic inharmonical element may be used for efficiently solving the problem of corner region and indetermination of normal direction of boundary point in numerical process.
    由于间接边界元方法的数值离散特性,应用二次非协调单元简便可行地解决了数值计算中的角域问题和边界点法向取值不确定问题。 对于含r-1的奇异积分取其柯西主值积分,含r-2的奇异积分由间接方法求得。
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  corner region
Stress-strain state in the corner region of a bed with a mine working
      
Problems of a wave "locked" in the corner region and of a flow accelerating along the rib of a dihedral angle are considered.
      
The results show that the flow in the effusive corner region is dominated by a B?dewadt-type spatially oscillatory boundary layer within the core region and a potential-like vortex boundary layer at large radii.
      
Binding of antibodies to the lignin-rich cell corner region of the middle lamella in wood decayed by P.
      
In a corner region of finite spanwise extent, the continuous spectrum of oblique modes degenerates to a discrete spectrum of modes of increasing spanwise wave number.
      
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Study on the 3-D steady temperature field by fictitious thermal source method is given. According to the numerical discrete character of indirect boundary element method, quadratic inharmonical element may be used for efficiently solving the problem of corner region and indetermination of normal direction of boundary point in numerical process. Numerical results for examples show high precision of present method which offers a useful method for the actual simulation calculation of 3-D temperature field...

Study on the 3-D steady temperature field by fictitious thermal source method is given. According to the numerical discrete character of indirect boundary element method, quadratic inharmonical element may be used for efficiently solving the problem of corner region and indetermination of normal direction of boundary point in numerical process. Numerical results for examples show high precision of present method which offers a useful method for the actual simulation calculation of 3-D temperature field in engineering, especially in roller compacted concrete arch dam.

以三维无限域内单位强度点热源作用的温度场为基本解,用二维虚拟热源法求解三维热传导问题的稳态温度场。由于间接边界元方法的数值离散特性,应用二次非协调单元简便可行地解决了数值计算中的角域问题和边界点法向取值不确定问题。对于含r-1的奇异积分取其柯西主值积分,含r-2的奇异积分由间接方法求得。算例表明此方法有很高的精度。为碾压混凝土拱坝仿真计算提供了有力工具。

Extension of material independent Perfectly Matched layer to dispersive media is made in this paper and perfectly matched condition for dispersive media is derived. Numerical experiment is done in lossy media and good result is achieved. Comparing with Q.H.Liu's method, the method can be used to more complicate material and comparing with S.D.Gedney's anisotropic material absorber, calculation in the corner region is more simple therefore, it is more suitable for FDTD, especially in three dimension case....

Extension of material independent Perfectly Matched layer to dispersive media is made in this paper and perfectly matched condition for dispersive media is derived. Numerical experiment is done in lossy media and good result is achieved. Comparing with Q.H.Liu's method, the method can be used to more complicate material and comparing with S.D.Gedney's anisotropic material absorber, calculation in the corner region is more simple therefore, it is more suitable for FDTD, especially in three dimension case.

将A.P.Zhao提出的与媒质无关的完全匹配层吸收边界推广到色散媒质中,推导出了用于色散媒质的无反射完全匹配条件。并对导电媒质进行了数值实验,结果十分理想。与Q.H.Liu的方法相比,该方法可以应用到更复杂的媒质中。而与S.D.Gedney的各向异性媒质吸收层相比,在角区的处理要简单得多,更适合于时域有限差分法。对于三维问题更是如此。

 
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