54 temperature = max(temperature, 1e-9);
55 temperature = min(temperature, 500.0);
56 pressure = max(pressure, 0.0);
57 pressure = min(pressure, 1e8);
63 const Scalar M_m = 1e3*Mesitylene::molarMass();
64 const Scalar M_a = 1e3*Air::molarMass();
65 const Scalar Tb_m = 437.9;
66 const Scalar sigma_a = 3.711;
67 const Scalar T_scal_a = 78.6;
68 const Scalar V_B_m = 162.6;
71 const Scalar sigma_m = 1.18*cbrt(V_B_m);
72 const Scalar sigma_am = 0.5*(sigma_a + sigma_m);
73 const Scalar T_scal_m = 1.15*Tb_m;
74 const Scalar T_scal_am = sqrt(T_scal_a*T_scal_m);
76 Scalar T_star = temperature/T_scal_am;
77 T_star = max(T_star, 1e-5);
79 const Scalar Omega = 1.06036/pow(T_star, 0.1561) + 0.193/exp(T_star*0.47635)
80 + 1.03587/exp(T_star*1.52996) + 1.76474/exp(T_star*3.89411);
81 const Scalar B_ = 0.00217 - 0.0005*sqrt(1.0/M_a + 1.0/M_m);
82 const Scalar Mr = (M_a + M_m)/(M_a*M_m);
83 const Scalar D_am = (B_*sqrt(temperature*temperature*temperature*Mr))
84 /(1e-5*pressure*power(sigma_am, 2) * Omega);