function m = fcn(Q, T_sat, T_w, sigma, rho_v, h_fg, M, P_v, R, g, beta, x, nu_novec, alpha_novec, k_m, d_pore, psi, k_f, rporous_outer, height_porous)
q_w = Q/(2*pi*rporous_outer*height_porous); %heat input converted to heat flux
if T_w>=T_sat
m = (((2*sigma)/(2-sigma))*((rho_v*(h_fg)^2)/T_sat)*((M/(2*pi*R*T_sat))^(0.5))*(1- ((P_v)/(2*rho_v*h_fg))));
else
m = (k_f*(0.5*(((g*beta*q_w*x^4)/(nu_novec*alpha_novec*k_m))*(((d_pore^2)*psi^3/(180*(1-psi^2)))/x^2))^(0.4)))/(x);
%the power of 0.4 is what triggers the complex number
end

When I run this code, I get the following error, which is triggered by the line ‘ m = (k_f*(0.5*(((g*beta*q_w*x^4)/(nu_novec*alpha_novec*k_m))*(((d_pore^2)*psi^3/(180*(1-psi^2)))/x^2))^(0.4)))/(x);

I’ve checked if any of the values result in a negative number, but none of the terms are negative, nor their result. I’ve run this separately, and this the same line works fine and I get a positive results without an complex number or any error? Why would this occur, does this error have to do anything with the if-else statement used? Any thoughts would be much appreciated.
I think this issue is triggered by the use of ^0.4, which cannot be changed. Why would an error/complex result occur in simulink and not in MATLAB?

Many thanksfunction m = fcn(Q, T_sat, T_w, sigma, rho_v, h_fg, M, P_v, R, g, beta, x, nu_novec, alpha_novec, k_m, d_pore, psi, k_f, rporous_outer, height_porous)
q_w = Q/(2*pi*rporous_outer*height_porous); %heat input converted to heat flux
if T_w>=T_sat
m = (((2*sigma)/(2-sigma))*((rho_v*(h_fg)^2)/T_sat)*((M/(2*pi*R*T_sat))^(0.5))*(1- ((P_v)/(2*rho_v*h_fg))));
else
m = (k_f*(0.5*(((g*beta*q_w*x^4)/(nu_novec*alpha_novec*k_m))*(((d_pore^2)*psi^3/(180*(1-psi^2)))/x^2))^(0.4)))/(x);
%the power of 0.4 is what triggers the complex number
end

When I run this code, I get the following error, which is triggered by the line ‘ m = (k_f*(0.5*(((g*beta*q_w*x^4)/(nu_novec*alpha_novec*k_m))*(((d_pore^2)*psi^3/(180*(1-psi^2)))/x^2))^(0.4)))/(x);

I’ve checked if any of the values result in a negative number, but none of the terms are negative, nor their result. I’ve run this separately, and this the same line works fine and I get a positive results without an complex number or any error? Why would this occur, does this error have to do anything with the if-else statement used? Any thoughts would be much appreciated.
I think this issue is triggered by the use of ^0.4, which cannot be changed. Why would an error/complex result occur in simulink and not in MATLAB?

Many thanks function m = fcn(Q, T_sat, T_w, sigma, rho_v, h_fg, M, P_v, R, g, beta, x, nu_novec, alpha_novec, k_m, d_pore, psi, k_f, rporous_outer, height_porous)
q_w = Q/(2*pi*rporous_outer*height_porous); %heat input converted to heat flux
if T_w>=T_sat
m = (((2*sigma)/(2-sigma))*((rho_v*(h_fg)^2)/T_sat)*((M/(2*pi*R*T_sat))^(0.5))*(1- ((P_v)/(2*rho_v*h_fg))));
else
m = (k_f*(0.5*(((g*beta*q_w*x^4)/(nu_novec*alpha_novec*k_m))*(((d_pore^2)*psi^3/(180*(1-psi^2)))/x^2))^(0.4)))/(x);
%the power of 0.4 is what triggers the complex number
end

When I run this code, I get the following error, which is triggered by the line ‘ m = (k_f*(0.5*(((g*beta*q_w*x^4)/(nu_novec*alpha_novec*k_m))*(((d_pore^2)*psi^3/(180*(1-psi^2)))/x^2))^(0.4)))/(x);

I’ve checked if any of the values result in a negative number, but none of the terms are negative, nor their result. I’ve run this separately, and this the same line works fine and I get a positive results without an complex number or any error? Why would this occur, does this error have to do anything with the if-else statement used? Any thoughts would be much appreciated.
I think this issue is triggered by the use of ^0.4, which cannot be changed. Why would an error/complex result occur in simulink and not in MATLAB?

Many thanks error, matlab function, if-else MATLAB Answers — New Questions

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