Adaptive ray tracing for radiative transfer around point sources
Adaptive ray tracing for radiative transfer around point sources
复制标题
点源周围辐射传输的自适应射线追踪
DOI：
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发表时间：
2001
期刊：
影响因子：
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通讯作者：
B. Wandelt
中科院分区：
文献类型：
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作者：
Tom Abel;B. Wandelt
本文提出了一种新的自适应射线追踪方法来求解流体动力学模拟中的点源辐射传输方程。角分辨率适应于局部流体动力学分辨率，因此用于自适应网格以及自适应光滑粒子流体动力学模拟。射线的递归创建确保了实现的简单性。一旦射线被投射，则使用四叉树显著地加快了求解与时间相关的辐射传递所需的多个径向积分。简化有利于一个辐射源的方法进行了简要讨论。该方法易于推广应用于加速蒙特卡罗辐射传递技术。总之，一个接近最佳使用的长特性，其实施方面和与其他方法的比较。
We describe a novel adaptive ray tracing scheme to solve the equation of radiative transfer around point sources in hydrodynamical simulations. The angular resolution adapts to the local hydrodynamical resolution and hence is of use for adaptive meshes as well as adaptive smooth particle hydrodynamical simulations. Recursive creation of rays ensures ease of implementation. The multiple radial integrations needed to solve the time-dependent radiative transfer are speeded up significantly using a quad-tree once the rays are cast. Simplifications advantageous for methods with one radiation source are briefly discussed. The suggested method is easily generalized to speed up Monte Carlo radiative transfer techniques. In summary, a nearly optimal use of long characteristics is presented and aspects of its implementation and comparison with other methods are given.