Discussion Closed This discussion was created more than 6 months ago and has been closed. To start a new discussion with a link back to this one, click here.

Assistance on solving heat transfer transient problem

Please login with a confirmed email address before reporting spam

I was trying to solve the below mentioned differential eqn. through Finite element methods,

Its a heat transfer transient problem between two glasses in a window, were we have to find temperatures θi & θj (temperature of 2 glasses in window), θk( temperature of air in between this glasses). And they have mentioned, to compute these temperature we have to use below two differential eqn. :

k.(dθi/dt) =∑ hrij.(θj−θi)+hcij.(θk−θi)+αei.ϕ > for each gas element

k.dθk/dt=∑ hckj.(θk−θj) > for air gap between the 2 glasses

On applying above equation in our scenario i got 3 coupled System of differential equation as below:

(dθi/dt) = -.816666666666667e-2*θi(t)+.666666666666667e-3*θj(t)+.138888888888889e-2*θk(t)+2.04

(dθj/dt) = -.666666666666667e-3*θi(t)-.294444444444444e-2*θj(t)-.138888888888889e-2*θk(t)+1.59

(dθk/dt) = -(1.27/0.01060)*θj(t)+(1.27/0.01060)*θk(t)+1.59

Could you please assist me how to solve this kind of problem.

0 Replies Last Post 2017年5月4日 GMT-4 18:45
COMSOL Moderator

Hello Karthik Vengatesan

Your Discussion has gone 30 days without a reply. If you still need help with COMSOL and have an on-subscription license, please visit our Support Center for help.

If you do not hold an on-subscription license, you may find an answer in another Discussion or in the Knowledge Base.

Note that while COMSOL employees may participate in the discussion forum, COMSOL® software users who are on-subscription should submit their questions via the Support Center for a more comprehensive response from the Technical Support team.