solve returns Empty sym: 0-by-1 answer

syms h

Tcz=20

To=533.3

k=155

rho=2680

c=963

a=k/(rho*c)

E2=73.1==To+(Tcz-To)*(1-exp((h*h*a*90)/(k*k))*(1-erf((h/k)*(sqrt(a*90)))))

assume(h>0)

[htc]=solve(E2,h)

the code returns

htc=

Empty sym: 0-by-1

Answer 1

[Pavan Guntha]

Hi,

The solve function returns an empty object if there isn't any solution to the equation. For instance if the equation is changed as shown below,

E2 = 730 == To+(Tcz-To)*(1-exp((h*h*a*90)/(k*k))*(1-erf((h/k)*(sqrt(a*90)))))

It returns the following solution:

htc = 
-555.33097392244426184617865401959

For more information, you could look at the documentation page of solve.

Hope it helps!