def eval_bc(self, arg, sid):
if sid == 0:
if not self.no_fourier:
r, th = domain_util.arg_to_polar_abs(self.boundary, self.a, arg, sid)
return self.eval_expected_polar(r, th)
else:
return self.eval_phi0(arg)
else:
return 0
def eval_d_u_outwards(self, arg, sid):
"""
Only for extension test.
"""
k = self.k
a = self.a
r, th = domain_util.arg_to_polar_abs(self.boundary, a, arg, sid)
x, y = r*np.cos(th), r*np.sin(th)
grad = self.get_grad(x, y)
if sid == 0:
normal = self.boundary.eval_normal(th)
elif sid == 1:
normal = (0, 1)
elif sid == 2:
normal = (np.sin(a), -np.cos(a))
return np.dot(grad, normal)
def eval_d_u_outwards(self, arg, sid):
# Debug function
# Only for true arc. At least at the moment
k = self.k
R = self.R
a = self.a
nu = self.nu
r, th = domain_util.arg_to_polar_abs(self.boundary, a, arg, sid)
d_u = 0
for m in range(1, self.m_max+1):
ac = self.fft_a_coef[m-1]
if sid == 0:
d_u += ac * k * jvp(m*nu, k*r, 1) * np.sin(m*nu*(th-a))
elif sid == 1:
d_u += ac * jv(m*nu, k*r) * m * nu * np.cos(m*nu*(th-a))
elif sid == 2:
d_u += -ac * jv(m*nu, k*r) * m * nu * np.cos(m*nu*(th-a))
return d_u
def eval_bc(self, arg, sid):
"""
Evaluate extended boundary condition.
"""
r, th = domain_util.arg_to_polar_abs(self.boundary, self.a, arg, sid)
return self.eval_expected_polar(r, th)
