value of the concentration is zero at all boundaries 1.0 ((((-5.0 + x) ^ 2.0) + ((-5.0 + y) ^ 2.0)) < 0.4) 1.0 96480.0 9.648E-5 1.0E-9 6.02E11 8314.0 300.0 1.0 1000.0 0.0016611295681063123 ((((-5.0 + x) ^ 2.0) + ((-5.0 + y) ^ 2.0)) < 0.4) 0.0 c_r_diffusionRate c_r_init c=0 value at all boundaries c=0 value at all boundaries value of the concentration is zero at all boundaries