Surface temperature of a Cylindrical heated rod

[Gurasees]

How can I calculate the surface temperature of a Cylindrical Heating rod after some time interval? There is internal heat generation in the rod and convective heat transfer to the surroundings.

 

[Mech_Engineer]

This is a complicated question, you have to consider things like forced convection and/or natural convection, as well as thermal radiation to the environment. Typically a college-level heat transfer class covers the specifics of how these calculations are done (see here: MIT Introduction to Heat Transfer).

Is this a homework problem? What is the context of the problem you're trying to solve?

 

[Gurasees]

This is a complicated question, you have to consider things like forced convection and/or natural convection, as well as thermal radiation to the environment. Typically a college-level heat transfer class covers the specifics of how these calculations are done (see here: MIT Introduction to Heat Transfer).

Is this a homework problem? What is the context of the problem you're trying to solve?

I have created a design of a drier in which cylinderical heating rods are being used. I am trying to do the analysis of the system in ANSYS CFD (Fluent).
In that case I have to put in the value of heat transfer coefficient.
To find its value I found the relation between heat transfer coefficient, Reynold's no., Prandtl no. and Nusselt no.
So I have to find the properties of fluid such as dynamic viscosity, at the film temperature which is equal to 1/2 (SURFACE TEMPERATURE + ambient temperature).
So, I need to know what surface temperature will the rod attain after a certain interval of time (known). After that the system will run in steady state conditions.
This is a case of forced convection.