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. Author manuscript; available in PMC: 2009 Dec 20.
Published in final edited form as: J Comput Phys. 2008 Dec 20;227(24):10162–10177. doi: 10.1016/j.jcp.2008.08.015

Fig. 3.

Fig. 3

CPU time vs. number of atoms for three settings of our new FFT-based algorithm with a smoother Wa2(r), a = 0.2 and the average relative error less than 1.0%. Grid-based: h = 0.0625; FFT 1: h = 0.0625; FFT 2: h = 0.03125. All tests were done for a model spherical solute of radius 1.