one dimensional unsteady heat conduction

vijeshjoshi23 · July 10, 2009, 13:26

Dear friends,
how to decide time step to solve one dimensional unsteady heat conduction through a slab by implicit scheme ?? I am writing a code in matlab to solve this. I am facing numerical oscillations. Plz help...

RenardP · July 10, 2009, 22:22

You can test your code by marching in time to a steady solution ( for which you can find an exact analytical solution ). Since you use an implicit scheme for your time integration the time step for a steady solution should not be a concern. If your code does not converge to the steady solution you should check again the implementation.

July 10, 2009, 13:26	one dimensional unsteady heat conduction	#1
vijeshjoshi23 New Member Vijesh Joshi Join Date: Mar 2009 Posts: 10 Rep Power: 17	Dear friends, how to decide time step to solve one dimensional unsteady heat conduction through a slab by implicit scheme ?? I am writing a code in matlab to solve this. I am facing numerical oscillations. Plz help...

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
calculating unsteady heat release due to comb	James	FLUENT	1	February 27, 2014 21:03
Conduction heat not balanced?	Nepal	CFX	7	May 31, 2005 12:51
Convective Heat Transfer - Heat Exchanger	Mark	CFX	6	November 15, 2004 16:55
Heat conduction through solid rib in periodic duct	Dieter Fauconnier	FLUENT	0	October 7, 2004 09:22
Unsteady Heat Transfer Modeling	Muller	FLUENT	5	June 7, 2003 02:28

July 10, 2009, 22:22		#2
RenardP Member Join Date: Mar 2009 Posts: 62 Rep Power: 17	You can test your code by marching in time to a steady solution ( for which you can find an exact analytical solution ). Since you use an implicit scheme for your time integration the time step for a steady solution should not be a concern. If your code does not converge to the steady solution you should check again the implementation.