using the solution for another problem

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Author Message   fowling New member Username: fowling Post Number: 1 Registered: 10-2010 Posted on Thursday, October 28, 2010 - 08:07 am:    Hello, I'm starting with FlexPDE and I would like to know if it is possible to use the solution of one problem for the initial values of another one. What I would like to do is take an steel bar with an homogeneous temperature (for example 1000 K) and from this point analyse the heat transferred by conduction, convection and radiation to the ambient depending on the time. At the same time analysing the evolution of the air's temperature. Thanks in advance.   jerrybrown11743 Member Username: jerrybrown11743 Post Number: 67 Registered: 03-2004 Posted on Friday, October 29, 2010 - 01:45 pm:    See documentation on FlexPDE's site at, http://www.pdesolutions.com/help/exportingdatatootherapplic.html?zoom_highlights ub=transfer   fowling New member Username: fowling Post Number: 2 Registered: 10-2010 Posted on Wednesday, November 03, 2010 - 10:38 am:    Thanks, I've been watching this documentation but I cannot find what I want to do. I would like to put an steel bar at 1000 K and its environment at 300K in the first file and in the second one see the loss of temperature by conduction and convection. The variable I'm using is the temperature that is the same in both problems so the program doesn't let me do it. Maybe there is another way to do this problem but I don't know it. I tried using Stages but it is a time-dependent time so I couldn't do it. I attach my problem here for a better understanding, there are two files: Problem1: The solution is the initial situation for Problem2 Problem2: Analysis of temperature depending on time. Thank you very much. Problem1 Problem1.pde (1.7 k) Problem2 Problem2.pde (1.7 k)   rgnelson Moderator Username: rgnelson Post Number: 1423 Registered: 06-2003 Posted on Wednesday, November 03, 2010 - 02:58 pm:    I don't understand the purpose of the first script; it just sets up initial values, which you can do with INITIAL VALUES. In the second script, you have a natural bc on an interior boundary, which will act as an energy source (see Natural BC in the Help index). Normally, at an interior boundary, fluxes will be matched on the two sides, controlled by the respective conductivities (ie, perfect contact). If you want to inhibit heat flow between the two regions, you will have to use a CONTACT boundary condition to impose the surface resistance.