FastQSL: A Fast Computation Method for Quasi-separatrix Layers
Peijin Zhang, Jun Chen, Rui Liu, Chuanbing Wang
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Abstract Magnetic reconnection preferentially takes place at the intersection of two separatrices or two quasi-separatrix layers, which can be quantified by the squashing factor Q , whose calculation is computationally expensive due to the need to trace as many field lines as possible. We developed a method (FastQSL) optimized for obtaining Q and the twist number in a 3D data cube. FastQSL utilizes the hardware accel ...
eration of the graphics processing unit and adopts a step-size adaptive scheme for the most computationally intensive part: tracing magnetic field lines. As a result, it achieves a computational efficiency of 4.53 million Q values per second. FastQSL is open source, and user-friendly for data import, export, and visualization.
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Abstract Magnetic reconnection preferentially takes place at the intersection of two separatrices or two quasi-separatrix layers, which can be quantified by the squashing factor Q , whose calculation is computationally expensive due to the need to trace as many field lines as possible.
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Research context
27
Citations
27
References
Tasks
Separatrix, Intersection (aeronautics), Computational science, Computation, Data cube, Tracing, Acceleration, Field line
Methods
Algorithm
Domains
Physics, Computational physics, Field (mathematics), Ray tracing (physics), Biochemistry, Genetics and Molecular Biology
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