Heat transfer in fluids, Comsol 4.0a

[nuevatecha]

Homework Statement

hi there,

I'm working on an annealing furnace. ingots are warmed up in the oven. I'm doing this with a finite elements method called Comsol Multiphysics. This is a pretty complex software program. Can someone please help me with this part of Comsol

Homework Equations

it is about an aluminum alloy warmed by air at a temperature of 610 degree's
alluminum has a thermal conductivity of 155 W/(m*K)

the density of air is not relevant in heat transfer (because of the reynolds number)

what is the heat capacity in this case? (velocity is 3.63 m/s)

how long will it take to heat the ingot from 20 degrees celsius to 609 degree's celsius?!

 

[member 553083]

The heat capacity equation is c=Q/ΔT, where c is the heat capacity, Q is the energy transferred, and ΔT is the change in temperature. For the time it takes to heat the ingot, you will need to use the formula t = mC (T2 - T1) / Q, where m is the mass of the ingot, C is the heat capacity, T2 is the final temperature, T1 is the initial temperature, and Q is the rate of energy transfer.