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lw840305
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Posted: Wed Apr 10, 2019 2:10 am |
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Joined: Mon May 28, 2012 7:38 pm Posts: 20
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Dear all, When I read propel.cc source file, I find when calculating the time-dependent propagation equation, for each time step, the computation would repeat 20 times, i.e. timestep_repeat = 20. I think the well-known Crank-Nicolson theme is unconditionally stable. Why does the computation repeat 20 times ?
Thank you very much for your reply.
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gudlaugu
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Posted: Thu Nov 28, 2019 2:16 am |
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Joined: Fri Jul 18, 2008 3:04 pm Posts: 61 Location: Stanford
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Sorry for the late reply. The code is meant to repeat until a steady state solution at each timestep. Hence we need several iterations at each timestep.
_________________ Gudlaugur Johannesson, GALPROP developer
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