solve returns Empty sym: 0-by-1 answer

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José Miguel Rivera Navarrete
José Miguel Rivera Navarrete el 16 de Nov. de 2021
Respondida: Pavan Guntha el 19 de Nov. de 2021
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

Respuestas (1)

Pavan Guntha
Pavan Guntha el 19 de Nov. de 2021
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!

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