Question

What is the formula for calculating a nodal point?

Answer 1

hi!

Need to evaluate certain values at every nodal point. Have discretized then have used for loop to do calculation. Not getting any error but there is a variation in the result. My need is the value of P1,P2 ..... etc must be evaluated at each point. Do x_bar(j) represent the value of x_bar at the j th position (like x_bar(1)=0,x_bar(1)=0.01etc).

Xb = [0, .5, 1.25, 1.50];

delx_bar = [.01, .005, .0001];

x_bar = cumsum([Xb(1), repelem(delx_bar,diff(Xb)./delx_bar)]);

del_eta=0.02;

eta_inf=4;

n_xbar=length(x_bar);

eta=(0:del_eta:eta_inf).';

n_eta=length(eta);

for j=2:n_xbar-1

for i=2:n_eta

P1(j) = 1 - cos(x_bar(j));

P2(j) = 1 + cos(x_bar(j));

end

end