s40571…

boundary_condition.py
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			#!/usr/bin/env python3
			import math


			class SinBoundary:

			def __init__(self, amplitude, phase):
			self.amplitude = amplitude
			self.phase = phase

			def compute(self, disp, coord, flags):
			disp[1] = - self.amplitude * math.sin(self.phase * coord[1])
			flags[1] = True