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Reducing the calculation workload of the Green function for electromagnetic scattering in a Schwarzschild gravitational field |
| Shou-Qing Jia(贾守卿) |
| School of Computer Science and Engineering, Northeastern University, Shenyang 110819, China |
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Abstract When the finite difference time domain (FDTD) method is used to solve electromagnetic scattering problems in Schwarzschild space-time, the Green functions linking source/observer to every surface element on connection/output boundary must be calculated. When the scatterer is electrically extended, a huge amount of calculation is required due to a large number of surface elements on the connection/output boundary. In this paper, a method for reducing the calculation workload of Green function is proposed. The Taylor approximation is applied for the calculation of Green function. New transport equations are deduced. The numerical results verify the effectiveness of this method.
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Received: 15 February 2019
Revised: 25 April 2019
Accepted manuscript online:
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PACS:
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04.40.Nr
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(Einstein-Maxwell spacetimes, spacetimes with fluids, radiation or classical fields)
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41.20.Jb
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(Electromagnetic wave propagation; radiowave propagation)
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02.60.Cb
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(Numerical simulation; solution of equations)
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02.70.Bf
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(Finite-difference methods)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant No. 61601105). |
Corresponding Authors:
Shou-Qing Jia
E-mail: jiashouqing@neuq.edu.cn
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Cite this article:
Shou-Qing Jia(贾守卿) Reducing the calculation workload of the Green function for electromagnetic scattering in a Schwarzschild gravitational field 2019 Chin. Phys. B 28 070401
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