# Variation of Internal Temperature with external temperature in a sphere

1. Jul 9, 2010

### princesvpk

http://www.cdeep.iitb.ac.in/nptel/Mechanical/Heat%20and%20Mass%20Transfer/Conduction/Module%202/main/2.6.3.html" [Broken]

I will be placing a temperature sensor in the hollow area and insulate the outer surface(with lets say Plaster of paris)....I will place a fire outside....I need to know how the temperature varies inside.....i.e Ts,2 Vs Ts,1......{in matlab}ill give Ts,2 as the input....i need to plot Ts,2 Vs Ts,1....but the problem is that Q also varies.....so how do i find out the temperature variation inside as the external temperature increases.....

Thank you for your time....kindly help

Last edited by a moderator: May 4, 2017
2. Jul 16, 2010

### 6Stang7

So are you asking for an equation that will tell you the inside surface temperature based on what the outside temperature is at steady state?

3. Jul 18, 2010

### princesvpk

Thank you for the time....i found out the answer with transient heat conduction equation...