Newton's Law of Cooling constant k

[maccaman]

In Newton's Law of Cooling, we have the constant k, i was just wondering (most people will prolly laugh at me) what the constant k represents, and what units this constant would have.

Also, can the law describe a cold object being heated up in a warmer environment.

Any help would be greatly appreciated, thanks.

 

[Clausius2]

You should typewrite your equation us to be sure. I guess you want to say:

q=h*(T-Ts) (Newton Law of cooling);

where h (k yours) is the convective coefficient in W/(m^2)K

Well, I wish you will never need to calculate h theoretically. It is used when it exists a heat transferring due to fluids movement or fluid to solid boundary movement. It could be calculated in two ways:

i) solving Navier Stokes equation for the fluid motion. (it would be dangerous for your health).

ii) using heavies correlations involving the Fluid Mechanics Numbers (Reynolds, Prandtl, Nusselt, etc).

 

[Didd]

Go to http://encyclopedia.thefreedictionary.com/Newton's law of cooling
and find out about K. And also http://www.southwestern.edu/~richards/cool.html.

 

[maccaman]

dy/dx = k(y - C)